Added: Rate Contract Module. To implement: Checking this during purchase.

brewman/alembic/versions/0363f582ab28_rename_auth.py

@@ -5,10 +5,8 @@ Revises: ad8b2d208492
 Create Date: 2021-09-11 05:32:56.683107
 
 """
-import sqlalchemy as sa
 
 from alembic import op
-from sqlalchemy.dialects import postgresql
 
 
 # revision identifiers, used by Alembic.

brewman/alembic/versions/071e8f29d257_rate_contracts.py

@@ -0,0 +1,71 @@
+"""rate contracts
+
+Revision ID: 071e8f29d257
+Revises: 0363f582ab28
+Create Date: 2021-09-11 05:57:49.062468
+
+"""
+import sqlalchemy as sa
+
+from alembic import op
+
+# revision identifiers, used by Alembic.
+from brewman.models.permission import Permission
+from sqlalchemy.dialects import postgresql
+
+
+revision = "071e8f29d257"
+down_revision = "0363f582ab28"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.execute(Permission.__table__.insert().values(id="f97589c6-df9f-45d3-874d-4245a4d99ade", name="Rate Contracts"))
+    op.create_table(
+        "rate_contracts",
+        sa.Column("id", postgresql.UUID(as_uuid=True), nullable=False),
+        sa.Column("date", sa.Date(), nullable=False),
+        sa.Column("vendor_id", postgresql.UUID(as_uuid=True), nullable=False),
+        sa.Column("valid_from", sa.Date(), nullable=True),
+        sa.Column("valid_till", sa.Date(), nullable=True),
+        sa.Column("narration", sa.Unicode(length=1000), nullable=False),
+        sa.Column("user_id", postgresql.UUID(as_uuid=True), nullable=False),
+        sa.Column("creation_date", sa.DateTime(), nullable=False),
+        sa.Column("last_edit_date", sa.DateTime(), nullable=False),
+        sa.ForeignKeyConstraint(["user_id"], ["users.id"], name=op.f("fk_rate_contracts_user_id_users")),
+        sa.ForeignKeyConstraint(["vendor_id"], ["accounts.id"], name=op.f("fk_rate_contracts_vendor_id_accounts")),
+        sa.PrimaryKeyConstraint("id", name=op.f("pk_rate_contracts")),
+    )
+    op.create_index(op.f("ix_rate_contracts_date"), "rate_contracts", ["date"], unique=False)
+    op.create_table(
+        "rate_contract_items",
+        sa.Column("id", postgresql.UUID(as_uuid=True), nullable=False),
+        sa.Column("rate_contract_id", postgresql.UUID(as_uuid=True), nullable=False),
+        sa.Column("product_id", postgresql.UUID(as_uuid=True), nullable=False),
+        sa.Column("cost_price", sa.Numeric(precision=15, scale=2), nullable=False),
+        sa.ForeignKeyConstraint(
+            ["product_id"], ["products.id"], name=op.f("fk_rate_contract_items_product_id_products")
+        ),
+        sa.ForeignKeyConstraint(
+            ["rate_contract_id"],
+            ["rate_contracts.id"],
+            name=op.f("fk_rate_contract_items_rate_contract_id_rate_contracts"),
+        ),
+        sa.PrimaryKeyConstraint("id", name=op.f("pk_rate_contract_items")),
+        sa.UniqueConstraint("rate_contract_id", "product_id", name=op.f("uq_rate_contract_items_rate_contract_id")),
+    )
+    op.create_index(
+        op.f("ix_rate_contract_items_rate_contract_id"), "rate_contract_items", ["rate_contract_id"], unique=False
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index(op.f("ix_rate_contract_items_rate_contract_id"), table_name="rate_contract_items")
+    op.drop_table("rate_contract_items")
+    op.drop_index(op.f("ix_rate_contracts_date"), table_name="rate_contracts")
+    op.drop_table("rate_contracts")
+    # ### end Alembic commands ###

brewman/alembic/versions/eed0b382c287_lowercase_fastapi.py

@@ -273,7 +273,7 @@ def upgrade():
     )
     op.execute(permission.delete().where(permission.c.name.in_(["Payment", "Receipt"])))
 
-    ### end Alembic commands ###
+    # ### end Alembic commands ###
 
 
 def downgrade():

brewman/brewman/db/base.py

@@ -18,6 +18,8 @@ from ..models.login_history import LoginHistory  # noqa: F401
 from ..models.permission import Permission  # noqa: F401
 from ..models.product import Product  # noqa: F401
 from ..models.product_group import ProductGroup  # noqa: F401
+from ..models.rate_contract import RateContract  # noqa: F401
+from ..models.rate_contract_item import RateContractItem  # noqa: F401
 from ..models.recipe import Recipe  # noqa: F401
 from ..models.recipe_item import RecipeItem  # noqa: F401
 from ..models.role import Role  # noqa: F401

brewman/brewman/main.py

@@ -33,6 +33,7 @@ from .routers import (
     product_group,
     purchase,
     purchase_return,
+    rate_contract,
     rebase,
     recipe,
     reset_stock,
@@ -76,6 +77,7 @@ app.include_router(attendance_types.router, prefix="/api/attendance-types", tags
 app.include_router(employee_attendance.router, prefix="/api/employee-attendance", tags=["attendance"])
 app.include_router(employee_attendance.router, prefix="/api/employee-attendance", tags=["attendance"])
 app.include_router(attendance_report.router, prefix="/attendance-report", tags=["attendance"])
+app.include_router(rate_contract.router, prefix="/api/rate-contracts", tags=["products"])
 
 app.include_router(cost_centre.router, prefix="/api/cost-centres", tags=["cost-centres"])
 app.include_router(employee.router, prefix="/api/employees", tags=["employees"])

brewman/brewman/models/account_base.py

@@ -32,6 +32,8 @@ class AccountBase(Base):
     journals = relationship("Journal", back_populates="account")
     cost_centre = relationship("CostCentre", back_populates="accounts")
 
+    rate_contracts = relationship("RateContract", back_populates="vendor")
+
     @property
     def __name__(self):
         return self.name

brewman/brewman/models/rate_contract.py

@@ -1,124 +1,50 @@
 import uuid
 
-from sqlalchemy import (
-    Boolean,
-    Column,
-    ForeignKey,
-    Integer,
-    Numeric,
-    Unicode,
-    UniqueConstraint,
-    case,
-    func,
-    select,
-)
+from datetime import datetime
+
+from sqlalchemy import Column, Date, DateTime, ForeignKey, Unicode
 from sqlalchemy.dialects.postgresql import UUID
-from sqlalchemy.ext.hybrid import hybrid_property
-from sqlalchemy.orm import Session, relationship
+from sqlalchemy.orm import relationship
 
 from .meta import Base
 
 
-class Product(Base):
-    __tablename__ = "products"
-    __table_args__ = (UniqueConstraint("name", "units"),)
+class RateContract(Base):
+    __tablename__ = "rate_contracts"
 
     id = Column("id", UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
-    code = Column("code", Integer, unique=True)
-    name = Column("name", Unicode(255), nullable=False)
-    units = Column("units", Unicode(255), nullable=False)
-    fraction = Column("fraction", Numeric(precision=15, scale=5), nullable=False)
-    fraction_units = Column("fraction_units", Unicode(255), nullable=False)
-    product_yield = Column("product_yield", Numeric(precision=15, scale=5), nullable=False)
-    product_group_id = Column(
-        "product_group_id",
-        UUID(as_uuid=True),
-        ForeignKey("product_groups.id"),
-        nullable=False,
-    )
-    account_id = Column("account_id", UUID(as_uuid=True), ForeignKey("accounts.id"), nullable=False)
-    price = Column("cost_price", Numeric(precision=15, scale=2), nullable=False)
-    sale_price = Column("sale_price", Numeric(precision=15, scale=2), nullable=False)
-    is_active = Column("is_active", Boolean, nullable=False)
-    is_fixture = Column("is_fixture", Boolean, nullable=False)
-    is_purchased = Column("is_purchased", Boolean, nullable=False)
-    is_sold = Column("is_sold", Boolean, nullable=False)
+    date = Column("date", Date, nullable=False, index=True)
+    vendor_id = Column("vendor_id", UUID(as_uuid=True), ForeignKey("accounts.id"), nullable=False)
+    valid_from = Column("valid_from", Date(), nullable=True)
+    valid_till = Column("valid_till", Date(), nullable=True)
+    narration = Column("narration", Unicode(1000), nullable=False)
 
-    product_group = relationship("ProductGroup", back_populates="products")
-    batches = relationship("Batch", back_populates="product")
-    inventories = relationship("Inventory", back_populates="product")
-    recipes = relationship("Recipe", back_populates="product")
-    account = relationship("Account", primaryjoin="Account.id==Product.account_id", back_populates="products")
+    user_id = Column("user_id", UUID(as_uuid=True), ForeignKey("users.id"), nullable=False)
+    creation_date = Column("creation_date", DateTime(), nullable=False)
+    last_edit_date = Column("last_edit_date", DateTime(), nullable=False)
+
+    user = relationship("User")
+    vendor = relationship("AccountBase", back_populates="rate_contracts")
+    items = relationship("RateContractItem", back_populates="rate_contract")
 
     def __init__(
         self,
-        code=None,
-        name=None,
-        units=None,
-        fraction=None,
-        fraction_units=None,
-        product_yield=None,
-        product_group_id=None,
-        account_id=None,
-        price=None,
-        sale_price=None,
-        is_active=None,
-        is_purchased=None,
-        is_sold=None,
+        date=None,
+        vendor_id=None,
+        valid_from=None,
+        valid_till=None,
+        narration="",
+        user_id=None,
+        creation_date=None,
+        last_edit_date=None,
         id_=None,
-        is_fixture=False,
     ):
-        self.code = code
-        self.name = name
-        self.units = units
-        self.fraction = fraction
-        self.fraction_units = fraction_units
-        self.product_yield = product_yield
-        self.product_group_id = product_group_id
-        self.account_id = account_id
-        self.price = price
-        self.sale_price = sale_price
-        self.is_active = is_active
-        self.is_purchased = is_purchased
-        self.is_sold = is_sold
+        self.date = date
+        self.vendor_id = vendor_id
+        self.valid_from = valid_from
+        self.valid_till = valid_till
+        self.narration = narration
+        self.user_id = user_id
+        self.creation_date = creation_date or datetime.utcnow()
+        self.last_edit_date = last_edit_date or datetime.utcnow()
         self.id = id_
-        self.is_fixture = is_fixture
-
-    @hybrid_property
-    def full_name(self):
-        return f"{self.name} ({self.units})" if self.units else self.name
-
-    @full_name.expression
-    def full_name(cls):
-        return cls.name + case([(cls.units != "", " (" + cls.units + ")")], else_="")
-
-    def create(self, db: Session):
-        self.code = db.execute(select(func.coalesce(func.max(Product.code), 0) + 1)).scalar_one()
-        db.add(self)
-        return self
-
-    def can_delete(self, advanced_delete: bool):
-        if self.is_fixture:
-            return False, f"{self.name} is a fixture and cannot be edited or deleted."
-        if self.is_active:
-            return False, "Product is active"
-        if len(self.inventories) > 0 and not advanced_delete:
-            return False, "Product has entries"
-        return True, ""
-
-    @classmethod
-    def query(cls, q, is_purchased: bool = None, active: bool = None, db: Session = None):
-        query_ = select(cls)
-        if active is not None:
-            query_ = query_.filter(cls.is_active == active)
-        if is_purchased is not None:
-            query_ = query_.filter(cls.is_purchased == is_purchased)
-        if q is not None:
-            for item in q.split():
-                if item.strip() != "":
-                    query_ = query_.filter(cls.name.ilike(f"%{item}%"))
-        return db.execute(query_).scalars().all()
-
-    @classmethod
-    def suspense(cls):
-        return uuid.UUID("aa79a643-9ddc-4790-ac7f-a41f9efb4c15")

brewman/brewman/models/rate_contract_item.py

@@ -1,119 +1,38 @@
 import uuid
 
-from sqlalchemy import (
-    Boolean,
-    Column,
-    ForeignKey,
-    Integer,
-    Numeric,
-    Unicode,
-    UniqueConstraint,
-    case,
-    func,
-    select, DateTime, Date,
-)
+from sqlalchemy import Column, ForeignKey, Numeric, UniqueConstraint
 from sqlalchemy.dialects.postgresql import UUID
-from sqlalchemy.ext.hybrid import hybrid_property
-from sqlalchemy.orm import Session, relationship
+from sqlalchemy.orm import relationship
 
 from .meta import Base
 
 
-class RateContract(Base):
-    __tablename__ = "rate_contracts"
-    __table_args__ = (UniqueConstraint("name", "units"),)
+class RateContractItem(Base):
+    __tablename__ = "rate_contract_items"
+    __table_args__ = (UniqueConstraint("rate_contract_id", "product_id"),)
 
     id = Column("id", UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    rate_contract_id = Column(
+        "rate_contract_id",
+        UUID(as_uuid=True),
+        ForeignKey("rate_contracts.id"),
+        nullable=False,
+        index=True,
+    )
+    product_id = Column("product_id", UUID(as_uuid=True), ForeignKey("products.id"), nullable=False)
+    price = Column("cost_price", Numeric(precision=15, scale=2), nullable=False)
 
-    user = relationship("User", primaryjoin="User.id==Voucher.user_id", cascade=None)
-    creation_date = Column("creation_date", DateTime(), nullable=False)
-    last_edit_date = Column("last_edit_date", DateTime(), nullable=False)
-
-    vendor_id = Column("vendor_id", UUID(as_uuid=True), ForeignKey("accounts.id"), nullable=False)
-
-    # product_id = Column("product_id", UUID(as_uuid=True), ForeignKey("products.id"), nullable=False)
-    # price = Column("cost_price", Numeric(precision=15, scale=2), nullable=False)
-
-    valid_from = Column("valid_from", Date(), nullable=True)
-    valid_till = Column("valid_till", Date(), nullable=True)
-
-    user = relationship("User")
-    vendor = relationship("Account", back_populates="rate_contracts")
-
-    # batches = relationship("Batch", back_populates="product")
-    # inventories = relationship("Inventory", back_populates="product")
-    # recipes = relationship("Recipe", back_populates="product")
-    # account = relationship("Account", primaryjoin="Account.id==Product.account_id", back_populates="products")
+    rate_contract = relationship("RateContract", back_populates="items")
+    product = relationship("Product")
 
     def __init__(
         self,
-        code=None,
-        name=None,
-        units=None,
-        fraction=None,
-        fraction_units=None,
-        product_yield=None,
-        product_group_id=None,
-        account_id=None,
+        rate_contract_id=None,
+        product_id=None,
         price=None,
-        sale_price=None,
-        is_active=None,
-        is_purchased=None,
-        is_sold=None,
         id_=None,
-        is_fixture=False,
     ):
-        self.code = code
-        self.name = name
-        self.units = units
-        self.fraction = fraction
-        self.fraction_units = fraction_units
-        self.product_yield = product_yield
-        self.product_group_id = product_group_id
-        self.account_id = account_id
+        self.rate_contract_id = rate_contract_id
+        self.product_id = product_id
         self.price = price
-        self.sale_price = sale_price
-        self.is_active = is_active
-        self.is_purchased = is_purchased
-        self.is_sold = is_sold
         self.id = id_
-        self.is_fixture = is_fixture
-
-    @hybrid_property
-    def full_name(self):
-        return f"{self.name} ({self.units})" if self.units else self.name
-
-    @full_name.expression
-    def full_name(cls):
-        return cls.name + case([(cls.units != "", " (" + cls.units + ")")], else_="")
-
-    def create(self, db: Session):
-        self.code = db.execute(select(func.coalesce(func.max(Product.code), 0) + 1)).scalar_one()
-        db.add(self)
-        return self
-
-    def can_delete(self, advanced_delete: bool):
-        if self.is_fixture:
-            return False, f"{self.name} is a fixture and cannot be edited or deleted."
-        if self.is_active:
-            return False, "Product is active"
-        if len(self.inventories) > 0 and not advanced_delete:
-            return False, "Product has entries"
-        return True, ""
-
-    @classmethod
-    def query(cls, q, is_purchased: bool = None, active: bool = None, db: Session = None):
-        query_ = select(cls)
-        if active is not None:
-            query_ = query_.filter(cls.is_active == active)
-        if is_purchased is not None:
-            query_ = query_.filter(cls.is_purchased == is_purchased)
-        if q is not None:
-            for item in q.split():
-                if item.strip() != "":
-                    query_ = query_.filter(cls.name.ilike(f"%{item}%"))
-        return db.execute(query_).scalars().all()
-
-    @classmethod
-    def suspense(cls):
-        return uuid.UUID("aa79a643-9ddc-4790-ac7f-a41f9efb4c15")

brewman/brewman/routers/rate_contract.py

@@ -0,0 +1,187 @@
+import uuid
+
+from typing import List
+
+from fastapi import APIRouter, HTTPException, Request, Security, status
+from sqlalchemy import delete, select
+from sqlalchemy.exc import SQLAlchemyError
+from sqlalchemy.orm import Session
+
+from ..core.security import get_current_active_user as get_user
+from ..core.session import (
+    get_date,
+    get_finish_date,
+    get_start_date,
+    set_date,
+    set_period,
+)
+from ..db.session import SessionFuture
+from ..models.rate_contract import RateContract
+from ..models.rate_contract_item import RateContractItem
+from ..schemas.product import ProductLink
+from ..schemas.rate_contract import AccountLink
+from ..schemas.rate_contract import RateContract as RateContractSchema
+from ..schemas.rate_contract import RateContractIn as RateContractInSchema
+from ..schemas.rate_contract import RateContractItem as RateContractItemSchema
+from ..schemas.user import UserToken
+from ..schemas.user_link import UserLink
+
+
+router = APIRouter()
+
+
+@router.post("", response_model=RateContractSchema)
+async def save(
+    data: RateContractInSchema,
+    request: Request,
+    user: UserToken = Security(get_user, scopes=["rate-contracts"]),
+) -> RateContractSchema:
+    try:
+        with SessionFuture() as db:
+            item = RateContract(
+                date=data.date_,
+                vendor_id=data.vendor.id_,
+                valid_from=data.valid_from,
+                valid_till=data.valid_till,
+                narration=data.narration,
+                user_id=user.id_,
+            )
+            db.add(item)
+            add_items(item, data.items, db)
+            set_date(data.date_.strftime("%d-%b-%Y"), request.session)
+            set_period(data.valid_from.strftime("%d-%b-%Y"), data.valid_till.strftime("%d-%b-%Y"), request.session)
+            db.commit()
+            return rate_contract_info(item)
+    except SQLAlchemyError as e:
+        raise HTTPException(
+            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+            detail=str(e),
+        )
+
+
+def add_items(rate_contract: RateContract, items: List[RateContractItemSchema], db: Session) -> None:
+    for item in items:
+        rci = RateContractItem(rate_contract_id=rate_contract.id, product_id=item.product.id_, price=item.price)
+        rate_contract.items.append(rci)
+        db.add(rci)
+
+
+@router.put("/{id_}", response_model=RateContractSchema)
+async def update_route(
+    id_: uuid.UUID,
+    data: RateContractInSchema,
+    request: Request,
+    user: UserToken = Security(get_user, scopes=["rate-contracts"]),
+) -> RateContractSchema:
+    try:
+        with SessionFuture() as db:
+            item: RateContract = db.execute(select(RateContract).where(RateContract.id == id_)).scalar_one()
+            item.date = data.date_
+            item.vendor_id = data.vendor.id_
+            item.valid_from = data.valid_from
+            item.valid_till = data.valid_till
+            item.narration = data.narration
+            item.user_id = user.id_
+            update_items(item, data.items, db)
+            set_date(data.date_.strftime("%d-%b-%Y"), request.session)
+            set_period(data.valid_from.strftime("%d-%b-%Y"), data.valid_till.strftime("%d-%b-%Y"), request.session)
+            db.commit()
+            return rate_contract_info(item)
+    except SQLAlchemyError as e:
+        raise HTTPException(
+            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+            detail=str(e),
+        )
+
+
+def update_items(rate_contract: RateContract, items: List[RateContractItemSchema], db: Session):
+    for it in range(len(rate_contract.items), 0, -1):
+        item = rate_contract.items[it - 1]
+        for j in range(len(items), 0, -1):
+            new_item = items[j - 1]
+            if new_item.id_ == item.id:
+                item.product_id = new_item.product.id_
+                item.price = new_item.price
+                items.remove(new_item)
+                break
+        else:
+            db.delete(item)
+            rate_contract.items.remove(item)
+    for item in items:
+        rci = RateContractItem(rate_contract_id=rate_contract.id, product_id=item.product.id_, price=item.price)
+        rate_contract.items.append(rci)
+        db.add(rci)
+
+
+@router.delete("/{id_}", response_model=RateContractInSchema)
+async def delete_route(
+    id_: uuid.UUID,
+    request: Request,
+    user: UserToken = Security(get_user, scopes=["rate-contracts"]),
+) -> RateContractInSchema:
+    with SessionFuture() as db:
+        db.execute(delete(RateContractItem).where(RateContractItem.rate_contract_id == id_))
+        db.execute(delete(RateContract).where(RateContract.id == id_))
+        db.commit()
+        return rate_contract_blank(request.session)
+
+
+@router.get("", response_model=RateContractInSchema)
+async def show_blank(
+    request: Request,
+    user: UserToken = Security(get_user, scopes=["rate-contracts"]),
+) -> RateContractInSchema:
+    return rate_contract_blank(request.session)
+
+
+@router.get("/list", response_model=List[RateContractSchema])
+async def show_list(
+    user: UserToken = Security(get_user),
+) -> List[RateContractSchema]:
+    with SessionFuture() as db:
+        return [
+            rate_contract_info(item)
+            for item in db.execute(select(RateContract).order_by(RateContract.date)).scalars().all()
+        ]
+
+
+@router.get("/{id_}", response_model=RateContractSchema)
+async def show_id(
+    id_: uuid.UUID,
+    user: UserToken = Security(get_user, scopes=["rate-contracts"]),
+) -> RateContractSchema:
+    with SessionFuture() as db:
+        item: RateContract = db.execute(select(RateContract).where(RateContract.id == id_)).scalar_one()
+        return rate_contract_info(item)
+
+
+def rate_contract_info(item: RateContract) -> RateContractSchema:
+    return RateContractSchema(
+        id=item.id,
+        date=item.date,
+        vendor=AccountLink(id=item.vendor_id, name=item.vendor.name),
+        validFrom=item.valid_from,
+        validTill=item.valid_till,
+        narration=item.narration,
+        creationDate=item.creation_date,
+        lastEditDate=item.last_edit_date,
+        user=UserLink(id=item.user_id, name=item.user.name),
+        items=[
+            RateContractItemSchema(
+                id=i.id,
+                product=ProductLink(id=i.product_id, name=i.product.full_name),
+                price=i.price,
+            )
+            for i in item.items
+        ],
+    )
+
+
+def rate_contract_blank(session: dict) -> RateContractInSchema:
+    return RateContractInSchema(
+        date=get_date(session),
+        validFrom=get_start_date(session),
+        validTill=get_finish_date(session),
+        narration="",
+        items=[],
+    )

brewman/brewman/routers/voucher.py

@@ -1,8 +1,7 @@
 import uuid
 
-from datetime import date, datetime
+from datetime import datetime
 from decimal import Decimal
-from typing import List, Optional
 
 import brewman.schemas.voucher as output
 
@@ -16,7 +15,6 @@ from ..core.session import get_first_day
 from ..db.session import SessionFuture
 from ..models.account import Account
 from ..models.account_base import AccountBase
-from ..models.account_type import AccountType
 from ..models.attendance import Attendance
 from ..models.attendance_type import AttendanceType
 from ..models.cost_centre import CostCentre

brewman/brewman/schemas/rate_contract.py

@@ -0,0 +1,91 @@
+import uuid
+
+from datetime import date, datetime
+from typing import List, Optional
+
+from pydantic import BaseModel, validator
+
+from . import to_camel
+from .account import AccountLink
+from .rate_contract_item import RateContractItem
+from .user_link import UserLink
+
+
+class RateContractIn(BaseModel):
+    date_: date
+    vendor: Optional[AccountLink]
+    valid_from: date
+    valid_till: date
+    narration: str
+    items: List[RateContractItem]
+
+    class Config:
+        anystr_strip_whitespace = True
+        alias_generator = to_camel
+        json_encoders = {
+            date: lambda v: v.strftime("%d-%b-%Y"),
+            datetime: lambda v: v.strftime("%d-%b-%Y %H:%I"),
+        }
+
+    @validator("date_", pre=True)
+    def parse_date(cls, value):
+        if isinstance(value, date):
+            return value
+        return datetime.strptime(value, "%d-%b-%Y").date()
+
+    @validator("valid_from", pre=True)
+    def parse_creation_date(cls, value):
+        if isinstance(value, date):
+            return value
+        return datetime.strptime(value, "%d-%b-%Y")
+
+    @validator("valid_till", pre=True)
+    def parse_last_edit_date(cls, value):
+        if isinstance(value, date):
+            return value
+        return datetime.strptime(value, "%d-%b-%Y")
+
+
+class RateContract(RateContractIn):
+    id_: uuid.UUID
+    creation_date: Optional[datetime]
+    last_edit_date: Optional[datetime]
+    user: Optional[UserLink]
+
+    class Config:
+        anystr_strip_whitespace = True
+        alias_generator = to_camel
+        json_encoders = {
+            date: lambda v: v.strftime("%d-%b-%Y"),
+            datetime: lambda v: v.strftime("%d-%b-%Y %H:%I"),
+        }
+
+    # @validator("date_", pre=True)
+    # def parse_date(cls, value):
+    #     if isinstance(value, date):
+    #         return value
+    #     return datetime.strptime(value, "%d-%b-%Y").date()
+    #
+    # @validator("valid_from", pre=True)
+    # def parse_creation_date(cls, value):
+    #     if isinstance(value, datetime):
+    #         return value
+    #     return datetime.strptime(value, "%d-%b-%Y %H:%M")
+    #
+    # @validator("valid_till", pre=True)
+    # def parse_last_edit_date(cls, value):
+    #     if isinstance(value, datetime):
+    #         return value
+    #     return datetime.strptime(value, "%d-%b-%Y %H:%M")
+
+    @validator("creation_date", pre=True)
+    def parse_creation_date(cls, value):
+        if isinstance(value, datetime):
+            return value
+        return datetime.strptime(value, "%d-%b-%Y %H:%M")
+
+    @validator("last_edit_date", pre=True)
+    def parse_last_edit_date(cls, value):
+        if isinstance(value, datetime):
+            return value
+        return datetime.strptime(value, "%d-%b-%Y %H:%M")

brewman/brewman/schemas/rate_contract_item.py

@@ -0,0 +1,17 @@
+import uuid
+
+from decimal import Decimal
+from typing import Optional
+
+from brewman.schemas import to_camel
+from brewman.schemas.product import ProductLink
+from pydantic import BaseModel, Field
+
+
+class RateContractItem(BaseModel):
+    id_: Optional[uuid.UUID]
+    product: ProductLink
+    price: Decimal = Field(ge=0, multiple_of=0.01)
+
+    class Config:
+        alias_generator = to_camel

overlord/src/app/app-routing.module.ts

@@ -68,6 +68,11 @@ const appRoutes: Routes = [
         (mod) => mod.EmployeeFunctionsModule,
       ),
   },
+  {
+    path: 'rate-contracts',
+    loadChildren: () =>
+      import('./rate-contract/rate-contract.module').then((mod) => mod.RateContractModule),
+  },
   {
     path: 'roles',
     loadChildren: () => import('./role/role.module').then((mod) => mod.RoleModule),

overlord/src/app/core/nav-bar/nav-bar.component.html

@@ -30,6 +30,7 @@
     <a mat-menu-item routerLink="/purchases">Purchases</a>
     <a mat-menu-item routerLink="/closing-stock">Closing Stock</a>
     <a mat-menu-item routerLink="/stock-movement">Stock Movement</a>
+    <a mat-menu-item routerLink="/rate-contracts">Rate Contracts</a>
   </mat-menu>
   <button mat-button [matMenuTriggerFor]="productReportMenu">Product Reports</button>
 

overlord/src/app/rate-contract/rate-contact.module.spec.ts

@@ -0,0 +1,13 @@
+import { RateContractModule } from './rate-contract.module';
+
+describe('RateContractModule', () => {
+  let rateContractModule: RateContractModule;
+
+  beforeEach(() => {
+    rateContractModule = new RateContractModule();
+  });
+
+  it('should create an instance', () => {
+    expect(rateContractModule).toBeTruthy();
+  });
+});

overlord/src/app/rate-contract/rate-contract-detail/rate-contract-detail-datasource.ts

@@ -0,0 +1,16 @@
+import { DataSource } from '@angular/cdk/collections';
+import { Observable } from 'rxjs';
+
+import { RateContractItem } from '../rate-contract-item';
+
+export class RateContractDetailDatasource extends DataSource<RateContractItem> {
+  constructor(private data: Observable<RateContractItem[]>) {
+    super();
+  }
+
+  connect(): Observable<RateContractItem[]> {
+    return this.data;
+  }
+
+  disconnect() {}
+}

overlord/src/app/rate-contract/rate-contract-detail/rate-contract-detail.component.css

@@ -0,0 +1,3 @@
+.example-card {
+  max-width: 400px;
+}

overlord/src/app/rate-contract/rate-contract-detail/rate-contract-detail.component.html

@@ -0,0 +1,164 @@
+<div fxLayout="row" fxFlex="50%" fxLayoutAlign="space-around center" class="example-card">
+  <mat-card fxFlex>
+    <mat-card-title-group>
+      <mat-card-title>Rate Contract</mat-card-title>
+    </mat-card-title-group>
+    <mat-card-content>
+      <form [formGroup]="form" fxLayout="column">
+        <div
+          fxLayout="row"
+          fxLayoutAlign="space-around start"
+          fxLayout.lt-md="column"
+          fxLayoutGap="20px"
+          fxLayoutGap.lt-md="0px"
+        >
+          <mat-form-field fxFlex="40">
+            <input
+              matInput
+              [matDatepicker]="date"
+              placeholder="Date"
+              formControlName="date"
+              autocomplete="off"
+              #dateElement
+            />
+            <mat-datepicker-toggle matSuffix [for]="date"></mat-datepicker-toggle>
+            <mat-datepicker #date></mat-datepicker>
+          </mat-form-field>
+          <mat-form-field fxFlex="60">
+            <input
+              type="text"
+              matInput
+              placeholder="Account"
+              #accountElement
+              [matAutocomplete]="autoA"
+              formControlName="account"
+              autocomplete="off"
+            />
+            <mat-autocomplete
+              #autoA="matAutocomplete"
+              autoActiveFirstOption
+              [displayWith]="displayFn"
+              (optionSelected)="accountSelected($event)"
+            >
+              <mat-option *ngFor="let account of accounts | async" [value]="account">{{
+                account.name
+              }}</mat-option>
+            </mat-autocomplete>
+          </mat-form-field>
+        </div>
+        <div
+          fxLayout="row"
+          fxLayout.lt-md="column"
+          fxLayoutGap="20px"
+          fxLayoutGap.lt-md="0px"
+          fxLayoutAlign="space-around start"
+        >
+          <mat-form-field fxFlex>
+            <input
+              matInput
+              [matDatepicker]="validFrom"
+              placeholder="Valid From"
+              formControlName="validFrom"
+              autocomplete="off"
+            />
+            <mat-datepicker-toggle matSuffix [for]="validFrom"></mat-datepicker-toggle>
+            <mat-datepicker #validFrom></mat-datepicker>
+          </mat-form-field>
+          <mat-form-field fxFlex>
+            <input
+              matInput
+              [matDatepicker]="validTill"
+              placeholder="Valid Till"
+              formControlName="validTill"
+              autocomplete="off"
+            />
+            <mat-datepicker-toggle matSuffix [for]="validTill"></mat-datepicker-toggle>
+            <mat-datepicker #validTill></mat-datepicker>
+          </mat-form-field>
+        </div>
+        <div
+          formGroupName="addRow"
+          fxLayout="row"
+          fxLayoutAlign="space-around start"
+          fxLayout.lt-md="column"
+          fxLayoutGap="20px"
+          fxLayoutGap.lt-md="0px"
+        >
+          <mat-form-field fxFlex="60">
+            <input
+              type="text"
+              matInput
+              placeholder="Product"
+              #productElement
+              [matAutocomplete]="autoP"
+              formControlName="product"
+              autocomplete="off"
+            />
+            <mat-autocomplete
+              #autoP="matAutocomplete"
+              autoActiveFirstOption
+              [displayWith]="displayFn"
+              (optionSelected)="productSelected($event)"
+            >
+              <mat-option *ngFor="let product of products | async" [value]="product">{{
+                product.name
+              }}</mat-option>
+            </mat-autocomplete>
+          </mat-form-field>
+          <mat-form-field fxFlex="20">
+            <mat-label>Price</mat-label>
+            <input
+              type="text"
+              matInput
+              placeholder="Price"
+              formControlName="price"
+              autocomplete="off"
+            />
+          </mat-form-field>
+          <button mat-raised-button color="primary" (click)="addRow()" fxFlex="20">Add</button>
+        </div>
+        <mat-table #table [dataSource]="dataSource" matSort aria-label="Elements">
+          <!-- Product Column -->
+          <ng-container matColumnDef="product">
+            <mat-header-cell *matHeaderCellDef>Product</mat-header-cell>
+            <mat-cell *matCellDef="let row">{{ row.product.name }}</mat-cell>
+          </ng-container>
+
+          <!-- Price Column -->
+          <ng-container matColumnDef="price">
+            <mat-header-cell *matHeaderCellDef class="right">Price</mat-header-cell>
+            <mat-cell *matCellDef="let row" class="right">{{
+              row.price | currency: 'INR'
+            }}</mat-cell>
+          </ng-container>
+
+          <!-- Action Column -->
+          <ng-container matColumnDef="action">
+            <mat-header-cell *matHeaderCellDef class="center">Action</mat-header-cell>
+            <mat-cell *matCellDef="let row" class="center">
+              <button mat-icon-button tabindex="-1" color="warn" (click)="deleteRow(row)">
+                <mat-icon>delete</mat-icon>
+              </button>
+            </mat-cell>
+          </ng-container>
+
+          <mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>
+          <mat-row *matRowDef="let row; columns: displayedColumns"></mat-row>
+        </mat-table>
+        <mat-form-field>
+          <mat-label>Narration</mat-label>
+          <textarea
+            matInput
+            matAutosizeMinRows="5"
+            placeholder="Narration"
+            formControlName="narration"
+          ></textarea>
+        </mat-form-field>
+      </form>
+    </mat-card-content>
+    <mat-card-actions>
+      <button mat-raised-button color="primary" (click)="save()">Save</button>
+      <button mat-raised-button color="warn" (click)="confirmDelete()">Delete</button>
+    </mat-card-actions>
+  </mat-card>
+</div>

overlord/src/app/rate-contract/rate-contract-detail/rate-contract-detail.component.spec.ts

@@ -0,0 +1,29 @@
+import { ComponentFixture, TestBed, waitForAsync } from '@angular/core/testing';
+import { ReactiveFormsModule } from '@angular/forms';
+import { RouterTestingModule } from '@angular/router/testing';
+
+import { RateContractDetailComponent } from './rate-contract-detail.component';
+
+describe('RateContractDetailComponent', () => {
+  let component: RateContractDetailComponent;
+  let fixture: ComponentFixture<RateContractDetailComponent>;
+
+  beforeEach(
+    waitForAsync(() => {
+      TestBed.configureTestingModule({
+        imports: [ReactiveFormsModule, RouterTestingModule],
+        declarations: [RateContractDetailComponent],
+      }).compileComponents();
+    }),
+  );
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(RateContractDetailComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

overlord/src/app/rate-contract/rate-contract-detail/rate-contract-detail.component.ts

@@ -0,0 +1,219 @@
+import { AfterViewInit, Component, ElementRef, OnInit, ViewChild } from '@angular/core';
+import { FormBuilder, FormControl, FormGroup } from '@angular/forms';
+import { MatAutocompleteSelectedEvent } from '@angular/material/autocomplete';
+import { MatDialog } from '@angular/material/dialog';
+import { ActivatedRoute, Router } from '@angular/router';
+import * as moment from 'moment';
+import { BehaviorSubject, Observable, of as observableOf } from 'rxjs';
+import { debounceTime, distinctUntilChanged, map, startWith, switchMap } from 'rxjs/operators';
+
+import { Account } from '../../core/account';
+import { AccountService } from '../../core/account.service';
+import { Product } from '../../core/product';
+import { ToasterService } from '../../core/toaster.service';
+import { ProductService } from '../../product/product.service';
+import { ConfirmDialogComponent } from '../../shared/confirm-dialog/confirm-dialog.component';
+import { MathService } from '../../shared/math.service';
+import { RateContract } from '../rate-contract';
+import { RateContractItem } from '../rate-contract-item';
+import { RateContractService } from '../rate-contract.service';
+
+import { RateContractDetailDatasource } from './rate-contract-detail-datasource';
+
+@Component({
+  selector: 'app-rate-contract-detail',
+  templateUrl: './rate-contract-detail.component.html',
+  styleUrls: ['./rate-contract-detail.component.css'],
+})
+export class RateContractDetailComponent implements OnInit, AfterViewInit {
+  @ViewChild('accountElement', { static: true }) accountElement?: ElementRef;
+  @ViewChild('productElement', { static: true }) productElement?: ElementRef;
+  public itemsObservable = new BehaviorSubject<RateContractItem[]>([]);
+  dataSource: RateContractDetailDatasource = new RateContractDetailDatasource(this.itemsObservable);
+  form: FormGroup;
+  item: RateContract = new RateContract();
+
+  product: Product | null = null;
+
+  displayedColumns = ['product', 'price', 'action'];
+
+  accounts: Observable<Account[]>;
+  products: Observable<Product[]>;
+
+  constructor(
+    private route: ActivatedRoute,
+    private router: Router,
+    private fb: FormBuilder,
+    private toaster: ToasterService,
+    private dialog: MatDialog,
+    private math: MathService,
+    private ser: RateContractService,
+    private productSer: ProductService,
+    private accountSer: AccountService,
+  ) {
+    this.form = this.fb.group({
+      date: '',
+      account: '',
+      validFrom: '',
+      validTill: '',
+      addRow: this.fb.group({
+        product: '',
+        price: '',
+      }),
+      narration: '',
+    });
+    this.accounts = (this.form.get('account') as FormControl).valueChanges.pipe(
+      startWith(null),
+      map((x) => (x !== null && x.length >= 1 ? x : null)),
+      debounceTime(150),
+      distinctUntilChanged(),
+      switchMap((x) => (x === null ? observableOf([]) : this.accountSer.autocomplete(x))),
+    );
+    // Listen to Product Autocomplete Change
+    this.products = (
+      (this.form.get('addRow') as FormControl).get('product') as FormControl
+    ).valueChanges.pipe(
+      startWith(null),
+      map((x) => (x !== null && x.length >= 1 ? x : null)),
+      debounceTime(150),
+      distinctUntilChanged(),
+      switchMap((x) => (x === null ? observableOf([]) : this.productSer.autocomplete(x))),
+    );
+  }
+
+  ngOnInit() {
+    this.route.data.subscribe((value) => {
+      const data = value as { item: RateContract };
+      this.loadItem(data.item);
+    });
+  }
+
+  loadItem(item: RateContract) {
+    this.item = item;
+    this.form.setValue({
+      date: moment(this.item.date, 'DD-MMM-YYYY').toDate(),
+      validFrom: moment(this.item.validFrom, 'DD-MMM-YYYY').toDate(),
+      validTill: moment(this.item.validTill, 'DD-MMM-YYYY').toDate(),
+      account: this.item.vendor,
+      addRow: {
+        product: '',
+        price: '',
+      },
+      narration: this.item.narration,
+    });
+    this.dataSource = new RateContractDetailDatasource(this.itemsObservable);
+    this.updateView();
+  }
+
+  ngAfterViewInit() {
+    setTimeout(() => {
+      if (this.accountElement) {
+        this.accountElement.nativeElement.focus();
+      }
+    }, 0);
+  }
+
+  addRow() {
+    const formValue = (this.form.get('addRow') as FormControl).value;
+    const price = this.math.parseAmount(formValue.price, 2);
+    if (this.product === null || price <= 0) {
+      return;
+    }
+    const oldFiltered = this.item.items.filter(
+      (x) => x.product.id === (this.product as Product).id,
+    );
+    if (oldFiltered.length) {
+      this.toaster.show('Danger', 'Product already added');
+      return;
+    }
+    this.item.items.push(
+      new RateContractItem({
+        price,
+        product: this.product,
+      }),
+    );
+    this.resetAddRow();
+    this.updateView();
+  }
+
+  resetAddRow() {
+    (this.form.get('addRow') as FormControl).reset({
+      product: null,
+      price: '',
+    });
+    this.product = null;
+    setTimeout(() => {
+      if (this.productElement) {
+        this.productElement.nativeElement.focus();
+      }
+    }, 0);
+  }
+
+  displayFn(item?: Account | Product): string {
+    return item ? item.name : '';
+  }
+
+  updateView() {
+    this.itemsObservable.next(this.item.items);
+  }
+
+  accountSelected(event: MatAutocompleteSelectedEvent): void {
+    (this.form.get('account') as FormControl).setValue(event.option.value);
+  }
+
+  productSelected(event: MatAutocompleteSelectedEvent): void {
+    this.product = event.option.value;
+  }
+
+  deleteRow(row: RateContractItem) {
+    this.item.items.splice(this.item.items.indexOf(row), 1);
+    this.updateView();
+  }
+
+  save() {
+    this.ser.saveOrUpdate(this.getItem()).subscribe(
+      () => {
+        this.toaster.show('Success', '');
+        this.router.navigateByUrl('/rate-contracts');
+      },
+      (error) => {
+        this.toaster.show('Danger', error);
+      },
+    );
+  }
+
+  delete() {
+    this.ser.delete(this.item.id as string).subscribe(
+      () => {
+        this.toaster.show('Success', '');
+        this.router.navigateByUrl('/rate-contracts');
+      },
+      (error) => {
+        this.toaster.show('Danger', error);
+      },
+    );
+  }
+
+  confirmDelete(): void {
+    const dialogRef = this.dialog.open(ConfirmDialogComponent, {
+      width: '250px',
+      data: { title: 'Delete RateContract?', content: 'Are you sure? This cannot be undone.' },
+    });
+
+    dialogRef.afterClosed().subscribe((result: boolean) => {
+      if (result) {
+        this.delete();
+      }
+    });
+  }
+
+  getItem(): RateContract {
+    const formModel = this.form.value;
+    this.item.date = moment(formModel.date).format('DD-MMM-YYYY');
+    this.item.validFrom = moment(formModel.validFrom).format('DD-MMM-YYYY');
+    this.item.validTill = moment(formModel.validTill).format('DD-MMM-YYYY');
+    this.item.vendor = formModel.account;
+    this.item.narration = formModel.narration;
+    return this.item;
+  }
+}

overlord/src/app/rate-contract/rate-contract-item.ts

@@ -0,0 +1,13 @@
+import { Product } from '../core/product';
+
+export class RateContractItem {
+  id: string | undefined;
+  product: Product;
+  price: number;
+
+  public constructor(init?: Partial<RateContractItem>) {
+    this.product = new Product();
+    this.price = 0;
+    Object.assign(this, init);
+  }
+}

overlord/src/app/rate-contract/rate-contract-list-resolver.service.spec.ts

@@ -0,0 +1,21 @@
+import { HttpClientModule } from '@angular/common/http';
+import { inject, TestBed } from '@angular/core/testing';
+import { RouterTestingModule } from '@angular/router/testing';
+
+import { RateContractListResolver } from './rate-contract-list-resolver.service';
+
+describe('RateContractListResolver', () => {
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      imports: [HttpClientModule, RouterTestingModule],
+      providers: [RateContractListResolver],
+    });
+  });
+
+  it('should be created', inject(
+    [RateContractListResolver],
+    (service: RateContractListResolver) => {
+      expect(service).toBeTruthy();
+    },
+  ));
+});

overlord/src/app/rate-contract/rate-contract-list-resolver.service.ts

@@ -0,0 +1,17 @@
+import { Injectable } from '@angular/core';
+import { Resolve } from '@angular/router';
+import { Observable } from 'rxjs/internal/Observable';
+
+import { RateContract } from './rate-contract';
+import { RateContractService } from './rate-contract.service';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class RateContractListResolver implements Resolve<RateContract[]> {
+  constructor(private ser: RateContractService) {}
+
+  resolve(): Observable<RateContract[]> {
+    return this.ser.list();
+  }
+}

overlord/src/app/rate-contract/rate-contract-list/rate-contract-list-datasource.ts

@@ -0,0 +1,74 @@
+import { DataSource } from '@angular/cdk/collections';
+import { EventEmitter } from '@angular/core';
+import { MatPaginator, PageEvent } from '@angular/material/paginator';
+import { MatSort, Sort } from '@angular/material/sort';
+import { merge, Observable, of as observableOf } from 'rxjs';
+import { map } from 'rxjs/operators';
+
+import { RateContract } from '../rate-contract';
+
+/** Simple sort comparator for example ID/Name columns (for client-side sorting). */
+const compare = (a: string | number, b: string | number, isAsc: boolean) =>
+  (a < b ? -1 : 1) * (isAsc ? 1 : -1);
+export class RateContractListDatasource extends DataSource<RateContract> {
+  constructor(
+    public data: RateContract[],
+    private paginator?: MatPaginator,
+    private sort?: MatSort,
+  ) {
+    super();
+  }
+
+  connect(): Observable<RateContract[]> {
+    const dataMutations: (
+      | Observable<RateContract[]>
+      | EventEmitter<PageEvent>
+      | EventEmitter<Sort>
+    )[] = [observableOf(this.data)];
+    if (this.paginator) {
+      dataMutations.push((this.paginator as MatPaginator).page);
+    }
+    if (this.sort) {
+      dataMutations.push((this.sort as MatSort).sortChange);
+    }
+
+    // Set the paginators length
+    if (this.paginator) {
+      this.paginator.length = this.data.length;
+    }
+
+    return merge(...dataMutations).pipe(
+      map(() => this.getPagedData(this.getSortedData([...this.data]))),
+    );
+  }
+
+  disconnect() {}
+
+  private getPagedData(data: RateContract[]) {
+    if (this.paginator === undefined) {
+      return data;
+    }
+    const startIndex = this.paginator.pageIndex * this.paginator.pageSize;
+    return data.splice(startIndex, this.paginator.pageSize);
+  }
+
+  private getSortedData(data: RateContract[]) {
+    if (this.sort === undefined) {
+      return data;
+    }
+    if (!this.sort.active || this.sort.direction === '') {
+      return data;
+    }
+
+    const sort = this.sort as MatSort;
+    return data.sort((a, b) => {
+      const isAsc = sort.direction === 'asc';
+      switch (sort.active) {
+        case 'vendor':
+          return compare(a.vendor.name, b.vendor.name, isAsc);
+        default:
+          return 0;
+      }
+    });
+  }
+}

overlord/src/app/rate-contract/rate-contract-list/rate-contract-list.component.html

@@ -0,0 +1,52 @@
+<mat-card>
+  <mat-card-title-group>
+    <mat-card-title>Rate Contracts</mat-card-title>
+    <a mat-button [routerLink]="['/rate-contracts', 'new']">
+      <mat-icon>add_box</mat-icon>
+      Add
+    </a>
+  </mat-card-title-group>
+  <mat-card-content>
+    <mat-table #table [dataSource]="dataSource" matSort aria-label="Elements">
+      <!-- Vendor Column -->
+      <ng-container matColumnDef="vendor">
+        <mat-header-cell *matHeaderCellDef mat-sort-header>Vendor</mat-header-cell>
+        <mat-cell *matCellDef="let row"
+          ><a [routerLink]="['/rate-contracts', row.id]"
+            >{{ row.vendor.name }} // {{ row.date }}</a
+          ></mat-cell
+        >
+      </ng-container>
+
+      <!-- Validity Column -->
+      <ng-container matColumnDef="validity">
+        <mat-header-cell *matHeaderCellDef mat-sort-header>Validity</mat-header-cell>
+        <mat-cell *matCellDef="let row"> {{ row.validFrom }} - {{ row.validTill }} </mat-cell>
+      </ng-container>
+
+      <!-- Products Column -->
+      <ng-container matColumnDef="products">
+        <mat-header-cell *matHeaderCellDef mat-sort-header>Products</mat-header-cell>
+        <mat-cell *matCellDef="let row">
+          <ul>
+            <li *ngFor="let item of row.items">
+              {{ item.product.name }} @ {{ item.price | currency: 'INR' }}
+            </li>
+          </ul>
+        </mat-cell>
+      </ng-container>
+
+      <mat-header-row *matHeaderRowDef="displayedColumns"></mat-header-row>
+      <mat-row *matRowDef="let row; columns: displayedColumns"></mat-row>
+    </mat-table>
+
+    <mat-paginator
+      #paginator
+      [length]="dataSource.data.length"
+      [pageIndex]="0"
+      [pageSize]="50"
+      [pageSizeOptions]="[25, 50, 100, 250]"
+    >
+    </mat-paginator>
+  </mat-card-content>
+</mat-card>

overlord/src/app/rate-contract/rate-contract-list/rate-contract-list.component.spec.ts

@@ -0,0 +1,24 @@
+import { ComponentFixture, fakeAsync, TestBed } from '@angular/core/testing';
+import { RouterTestingModule } from '@angular/router/testing';
+
+import { RateContractListComponent } from './rate-contract-list.component';
+
+describe('RateContractListComponent', () => {
+  let component: RateContractListComponent;
+  let fixture: ComponentFixture<RateContractListComponent>;
+
+  beforeEach(fakeAsync(() => {
+    TestBed.configureTestingModule({
+      imports: [RouterTestingModule],
+      declarations: [RateContractListComponent],
+    }).compileComponents();
+
+    fixture = TestBed.createComponent(RateContractListComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  }));
+
+  it('should compile', () => {
+    expect(component).toBeTruthy();
+  });
+});

overlord/src/app/rate-contract/rate-contract-list/rate-contract-list.component.ts

@@ -0,0 +1,33 @@
+import { Component, OnInit, ViewChild } from '@angular/core';
+import { MatPaginator } from '@angular/material/paginator';
+import { MatSort } from '@angular/material/sort';
+import { ActivatedRoute } from '@angular/router';
+
+import { RateContract } from '../rate-contract';
+
+import { RateContractListDatasource } from './rate-contract-list-datasource';
+
+@Component({
+  selector: 'app-rate-contract-list',
+  templateUrl: './rate-contract-list.component.html',
+  styleUrls: ['./rate-contract-list.component.css'],
+})
+export class RateContractListComponent implements OnInit {
+  @ViewChild(MatPaginator, { static: true }) paginator?: MatPaginator;
+  @ViewChild(MatSort, { static: true }) sort?: MatSort;
+  list: RateContract[] = [];
+  dataSource: RateContractListDatasource = new RateContractListDatasource(this.list);
+  /** Columns displayed in the table. Columns IDs can be added, removed, or reordered. */
+  displayedColumns = ['vendor', 'validity', 'products'];
+
+  constructor(private route: ActivatedRoute) {}
+
+  ngOnInit() {
+    this.route.data.subscribe((value) => {
+      const data = value as { list: RateContract[] };
+
+      this.list = data.list;
+    });
+    this.dataSource = new RateContractListDatasource(this.list, this.paginator, this.sort);
+  }
+}

overlord/src/app/rate-contract/rate-contract-resolver.service.spec.ts

@@ -0,0 +1,18 @@
+import { HttpClientModule } from '@angular/common/http';
+import { inject, TestBed } from '@angular/core/testing';
+import { RouterTestingModule } from '@angular/router/testing';
+
+import { RateContractResolver } from './rate-contract-resolver.service';
+
+describe('RateContractResolver', () => {
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      imports: [HttpClientModule, RouterTestingModule],
+      providers: [RateContractResolver],
+    });
+  });
+
+  it('should be created', inject([RateContractResolver], (service: RateContractResolver) => {
+    expect(service).toBeTruthy();
+  }));
+});

overlord/src/app/rate-contract/rate-contract-resolver.service.ts

@@ -0,0 +1,18 @@
+import { Injectable } from '@angular/core';
+import { ActivatedRouteSnapshot, Resolve } from '@angular/router';
+import { Observable } from 'rxjs/internal/Observable';
+
+import { RateContract } from './rate-contract';
+import { RateContractService } from './rate-contract.service';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class RateContractResolver implements Resolve<RateContract> {
+  constructor(private ser: RateContractService) {}
+
+  resolve(route: ActivatedRouteSnapshot): Observable<RateContract> {
+    const id = route.paramMap.get('id');
+    return this.ser.get(id);
+  }
+}

overlord/src/app/rate-contract/rate-contract-routing.module.spec.ts

@@ -0,0 +1,13 @@
+import { RateContractRoutingModule } from './rate-contract-routing.module';
+
+describe('RateContractRoutingModule', () => {
+  let rateContractRoutingModule: RateContractRoutingModule;
+
+  beforeEach(() => {
+    rateContractRoutingModule = new RateContractRoutingModule();
+  });
+
+  it('should create an instance', () => {
+    expect(rateContractRoutingModule).toBeTruthy();
+  });
+});

overlord/src/app/rate-contract/rate-contract-routing.module.ts

@@ -0,0 +1,53 @@
+import { CommonModule } from '@angular/common';
+import { NgModule } from '@angular/core';
+import { RouterModule, Routes } from '@angular/router';
+
+import { AuthGuard } from '../auth/auth-guard.service';
+
+import { RateContractDetailComponent } from './rate-contract-detail/rate-contract-detail.component';
+import { RateContractListResolver } from './rate-contract-list-resolver.service';
+import { RateContractListComponent } from './rate-contract-list/rate-contract-list.component';
+import { RateContractResolver } from './rate-contract-resolver.service';
+
+const rateContractRoutes: Routes = [
+  {
+    path: '',
+    component: RateContractListComponent,
+    canActivate: [AuthGuard],
+    data: {
+      permission: 'Rate Contracts',
+    },
+    resolve: {
+      list: RateContractListResolver,
+    },
+  },
+  {
+    path: 'new',
+    component: RateContractDetailComponent,
+    canActivate: [AuthGuard],
+    data: {
+      permission: 'Rate Contracts',
+    },
+    resolve: {
+      item: RateContractResolver,
+    },
+  },
+  {
+    path: ':id',
+    component: RateContractDetailComponent,
+    canActivate: [AuthGuard],
+    data: {
+      permission: 'Rate Contracts',
+    },
+    resolve: {
+      item: RateContractResolver,
+    },
+  },
+];
+
+@NgModule({
+  imports: [CommonModule, RouterModule.forChild(rateContractRoutes)],
+  exports: [RouterModule],
+  providers: [RateContractListResolver, RateContractResolver],
+})
+export class RateContractRoutingModule {}

overlord/src/app/rate-contract/rate-contract.module.ts

@@ -0,0 +1,71 @@
+import { CdkTableModule } from '@angular/cdk/table';
+import { CommonModule } from '@angular/common';
+import { NgModule } from '@angular/core';
+import { FlexLayoutModule } from '@angular/flex-layout';
+import { ReactiveFormsModule } from '@angular/forms';
+import { MomentDateAdapter } from '@angular/material-moment-adapter';
+import { MatAutocompleteModule } from '@angular/material/autocomplete';
+import { MatButtonModule } from '@angular/material/button';
+import { MatCardModule } from '@angular/material/card';
+import { MatCheckboxModule } from '@angular/material/checkbox';
+import {
+  DateAdapter,
+  MAT_DATE_FORMATS,
+  MAT_DATE_LOCALE,
+  MatNativeDateModule,
+} from '@angular/material/core';
+import { MatDatepickerModule } from '@angular/material/datepicker';
+import { MatDividerModule } from '@angular/material/divider';
+import { MatIconModule } from '@angular/material/icon';
+import { MatInputModule } from '@angular/material/input';
+import { MatPaginatorModule } from '@angular/material/paginator';
+import { MatProgressSpinnerModule } from '@angular/material/progress-spinner';
+import { MatSortModule } from '@angular/material/sort';
+import { MatTableModule } from '@angular/material/table';
+
+import { SharedModule } from '../shared/shared.module';
+
+import { RateContractDetailComponent } from './rate-contract-detail/rate-contract-detail.component';
+import { RateContractListComponent } from './rate-contract-list/rate-contract-list.component';
+import { RateContractRoutingModule } from './rate-contract-routing.module';
+
+export const MY_FORMATS = {
+  parse: {
+    dateInput: 'DD-MMM-YYYY',
+  },
+  display: {
+    dateInput: 'DD-MMM-YYYY',
+    monthYearLabel: 'MMM YYYY',
+    dateA11yLabel: 'DD-MMM-YYYY',
+    monthYearA11yLabel: 'MMM YYYY',
+  },
+};
+
+@NgModule({
+  imports: [
+    CommonModule,
+    CdkTableModule,
+    FlexLayoutModule,
+    MatButtonModule,
+    MatCardModule,
+    MatCheckboxModule,
+    MatDividerModule,
+    MatIconModule,
+    MatInputModule,
+    MatPaginatorModule,
+    MatProgressSpinnerModule,
+    MatSortModule,
+    MatTableModule,
+    ReactiveFormsModule,
+    SharedModule,
+    RateContractRoutingModule,
+    MatDatepickerModule,
+    MatAutocompleteModule,
+  ],
+  declarations: [RateContractListComponent, RateContractDetailComponent],
+  providers: [
+    { provide: DateAdapter, useClass: MomentDateAdapter, deps: [MAT_DATE_LOCALE] },
+    { provide: MAT_DATE_FORMATS, useValue: MY_FORMATS },
+  ],
+})
+export class RateContractModule {}

overlord/src/app/rate-contract/rate-contract.service.spec.ts

@@ -0,0 +1,17 @@
+import { HttpClientModule } from '@angular/common/http';
+import { inject, TestBed } from '@angular/core/testing';
+
+import { RateContractService } from './rate-contract.service';
+
+describe('RateContractService', () => {
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      imports: [HttpClientModule],
+      providers: [RateContractService],
+    });
+  });
+
+  it('should be created', inject([RateContractService], (service: RateContractService) => {
+    expect(service).toBeTruthy();
+  }));
+});

overlord/src/app/rate-contract/rate-contract.service.ts

@@ -0,0 +1,58 @@
+import { HttpClient } from '@angular/common/http';
+import { Injectable } from '@angular/core';
+import { Observable } from 'rxjs/internal/Observable';
+import { catchError } from 'rxjs/operators';
+
+import { ErrorLoggerService } from '../core/error-logger.service';
+
+import { RateContract } from './rate-contract';
+
+const url = '/api/rate-contracts';
+const serviceName = 'RateContractService';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class RateContractService {
+  constructor(private http: HttpClient, private log: ErrorLoggerService) {}
+
+  get(id: string | null): Observable<RateContract> {
+    const getUrl: string = id === null ? `${url}` : `${url}/${id}`;
+    return this.http
+      .get<RateContract>(getUrl)
+      .pipe(
+        catchError(this.log.handleError(serviceName, `get id=${id}`)),
+      ) as Observable<RateContract>;
+  }
+
+  list(): Observable<RateContract[]> {
+    return this.http
+      .get<RateContract[]>(`${url}/list`)
+      .pipe(catchError(this.log.handleError(serviceName, 'list'))) as Observable<RateContract[]>;
+  }
+
+  save(rateContract: RateContract): Observable<RateContract> {
+    return this.http
+      .post<RateContract>(`${url}`, rateContract)
+      .pipe(catchError(this.log.handleError(serviceName, 'save'))) as Observable<RateContract>;
+  }
+
+  update(rateContract: RateContract): Observable<RateContract> {
+    return this.http
+      .put<RateContract>(`${url}/${rateContract.id}`, rateContract)
+      .pipe(catchError(this.log.handleError(serviceName, 'update'))) as Observable<RateContract>;
+  }
+
+  saveOrUpdate(rateContract: RateContract): Observable<RateContract> {
+    if (!rateContract.id) {
+      return this.save(rateContract);
+    }
+    return this.update(rateContract);
+  }
+
+  delete(id: string): Observable<RateContract> {
+    return this.http
+      .delete<RateContract>(`${url}/${id}`)
+      .pipe(catchError(this.log.handleError(serviceName, 'delete'))) as Observable<RateContract>;
+  }
+}

overlord/src/app/rate-contract/rate-contract.ts

@@ -0,0 +1,30 @@
+import { Account } from '../core/account';
+import { User } from '../core/user';
+
+import { RateContractItem } from './rate-contract-item';
+
+export class RateContract {
+  id: string | undefined;
+  date: string;
+  vendor: Account;
+  validFrom: string;
+  validTill: string;
+  narration: string;
+  creationDate: string;
+  lastEditDate: string;
+  user: User;
+  items: RateContractItem[];
+
+  public constructor(init?: Partial<RateContract>) {
+    this.date = '';
+    this.vendor = new Account();
+    this.validFrom = '';
+    this.validTill = '';
+    this.narration = '';
+    this.creationDate = '';
+    this.lastEditDate = '';
+    this.user = new User();
+    this.items = [];
+    Object.assign(this, init);
+  }
+}