added backend task services and endpoints (#61)

## Notion ticket link
<!-- Please replace with your ticket's URL -->
[Admin Dash - Task
Pages](https://www.notion.so/uwblueprintexecs/Admin-Dash-Tasks-Pages-27210f3fb1dc80a2a08ef9f3693429c8)


<!-- Give a quick summary of the implementation details, provide design
justifications if necessary -->
## Implementation description
* Added service to assign, create and list tasks


<!-- What should the reviewer do to verify your changes? Describe
expected results and include screenshots when appropriate -->
## Steps to test
1. Make a user, try the endpoints


<!-- Draw attention to the substantial parts of your PR or anything
you'd like a second opinion on -->
## What should reviewers focus on?
* Proper permission logic when assigning tasks (Should be for admins
only)
* Take a look at the current email verified logic
* Make sure only admins can access certain endpoints


## Checklist
- [x] My PR name is descriptive and in imperative tense
- [x] My commit messages are descriptive and in imperative tense. My
commits are atomic and trivial commits are squashed or fixup'd into
non-trivial commits
- [x] I have run the appropriate linter(s)
- [x] I have requested a review from the PL, as well as other devs who
have background knowledge on this PR or who will be building on top of
this PR

Author: richieb21

CLAUDE.md

@@ -157,8 +157,6 @@ import logging
 log = logging.getLogger(LOGGER_NAME("my_service"))
 ```
 
-New logger names must be added to `alembic.ini` under the logger section.
-
 ## Testing
 
 - Backend tests: `pdm run tests` (runs pytest in `backend/tests/`)

backend/app/interfaces/task_service.py

@@ -0,0 +1,116 @@
+from abc import ABC, abstractmethod
+from typing import List, Optional
+from uuid import UUID
+
+from app.schemas.task import TaskCreateRequest, TaskResponse, TaskUpdateRequest
+
+
+class ITaskService(ABC):
+    """
+    TaskService interface with task management methods
+    """
+
+    @abstractmethod
+    async def create_task(self, task: TaskCreateRequest) -> TaskResponse:
+        """
+        Create a new task
+
+        :param task: the task to be created
+        :type task: TaskCreateRequest
+        :return: the created task
+        :rtype: TaskResponse
+        :raises Exception: if task creation fails
+        """
+        pass
+
+    @abstractmethod
+    async def get_task_by_id(self, task_id: UUID) -> TaskResponse:
+        """
+        Get task associated with task_id
+
+        :param task_id: task's id
+        :type task_id: UUID
+        :return: a TaskResponse with task's information
+        :rtype: TaskResponse
+        :raises Exception: if task retrieval fails
+        """
+        pass
+
+    @abstractmethod
+    async def get_all_tasks(
+        self,
+        status: Optional[str] = None,
+        priority: Optional[str] = None,
+        task_type: Optional[str] = None,
+        assignee_id: Optional[UUID] = None,
+    ) -> List[TaskResponse]:
+        """
+        Get all tasks with optional filters
+
+        :param status: filter by task status
+        :type status: str, optional
+        :param priority: filter by task priority
+        :type priority: str, optional
+        :param task_type: filter by task type
+        :type task_type: str, optional
+        :param assignee_id: filter by assignee
+        :type assignee_id: UUID, optional
+        :return: list of TaskResponse
+        :rtype: List[TaskResponse]
+        :raises Exception: if task retrieval fails
+        """
+        pass
+
+    @abstractmethod
+    async def update_task(self, task_id: UUID, task_update: TaskUpdateRequest) -> TaskResponse:
+        """
+        Update a task
+
+        :param task_id: task's id
+        :type task_id: UUID
+        :param task_update: the task updates
+        :type task_update: TaskUpdateRequest
+        :return: the updated task
+        :rtype: TaskResponse
+        :raises Exception: if task update fails
+        """
+        pass
+
+    @abstractmethod
+    async def assign_task(self, task_id: UUID, assignee_id: UUID) -> TaskResponse:
+        """
+        Assign a task to an admin user
+
+        :param task_id: task's id
+        :type task_id: UUID
+        :param assignee_id: admin user's id to assign
+        :type assignee_id: UUID
+        :return: the updated task
+        :rtype: TaskResponse
+        :raises Exception: if task assignment fails
+        """
+        pass
+
+    @abstractmethod
+    async def complete_task(self, task_id: UUID) -> TaskResponse:
+        """
+        Mark a task as completed
+
+        :param task_id: task's id
+        :type task_id: UUID
+        :return: the completed task
+        :rtype: TaskResponse
+        :raises Exception: if task completion fails
+        """
+        pass
+
+    @abstractmethod
+    async def delete_task(self, task_id: UUID) -> None:
+        """
+        Delete a task by task_id
+
+        :param task_id: task_id of task to be deleted
+        :type task_id: UUID
+        :raises Exception: if task deletion fails
+        """
+        pass

backend/app/models/Task.py

@@ -0,0 +1,75 @@
+import uuid
+from datetime import datetime
+from enum import Enum as PyEnum
+
+from sqlalchemy import Column, DateTime, ForeignKey
+from sqlalchemy import Enum as SQLEnum
+from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.orm import relationship
+
+from .Base import Base
+
+
+class TaskType(str, PyEnum):
+    INTAKE_FORM_REVIEW = "intake_form_review"
+    VOLUNTEER_APP_REVIEW = "volunteer_app_review"
+    PROFILE_UPDATE = "profile_update"
+    MATCHING = "matching"
+
+
+class TaskPriority(str, PyEnum):
+    NO_STATUS = "no_status"
+    LOW = "low"
+    MEDIUM = "medium"
+    HIGH = "high"
+
+
+class TaskStatus(str, PyEnum):
+    PENDING = "pending"
+    IN_PROGRESS = "in_progress"
+    COMPLETED = "completed"
+
+
+class Task(Base):
+    __tablename__ = "tasks"
+
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    participant_id = Column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=True)
+    type = Column(
+        SQLEnum(
+            TaskType,
+            name="task_type_enum",
+            create_type=False,
+            values_callable=lambda enum_cls: [member.value for member in enum_cls],
+        ),
+        nullable=False,
+    )
+    priority = Column(
+        SQLEnum(
+            TaskPriority,
+            name="task_priority_enum",
+            create_type=False,
+            values_callable=lambda enum_cls: [member.value for member in enum_cls],
+        ),
+        nullable=False,
+        default=TaskPriority.NO_STATUS,
+    )
+    status = Column(
+        SQLEnum(
+            TaskStatus,
+            name="task_status_enum",
+            create_type=False,
+            values_callable=lambda enum_cls: [member.value for member in enum_cls],
+        ),
+        nullable=False,
+        default=TaskStatus.PENDING,
+    )
+    assignee_id = Column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=True)
+    start_date = Column(DateTime, nullable=False, default=datetime.utcnow)
+    end_date = Column(DateTime, nullable=True)
+    created_at = Column(DateTime, nullable=False, default=datetime.utcnow)
+    updated_at = Column(DateTime, nullable=False, default=datetime.utcnow, onupdate=datetime.utcnow)
+
+    # Relationships
+    participant = relationship("User", foreign_keys=[participant_id], backref="participant_tasks")
+    assignee = relationship("User", foreign_keys=[assignee_id], backref="assigned_tasks")

backend/app/models/__init__.py

@@ -19,6 +19,7 @@
 from .RankingPreference import RankingPreference
 from .Role import Role
 from .SuggestedTime import suggested_times
+from .Task import Task, TaskPriority, TaskStatus, TaskType
 from .TimeBlock import TimeBlock
 from .Treatment import Treatment
 from .User import FormStatus, User
@@ -43,6 +44,10 @@
     "Form",
     "FormSubmission",
     "FormStatus",
+    "Task",
+    "TaskType",
+    "TaskPriority",
+    "TaskStatus",
 ]
 
 log = logging.getLogger(LOGGER_NAME("models"))

backend/app/routes/task.py

@@ -0,0 +1,163 @@
+from typing import Optional
+from uuid import UUID
+
+from fastapi import APIRouter, Depends, HTTPException, Query
+
+from app.middleware.auth import has_roles
+from app.schemas.task import (
+    TaskAssignRequest,
+    TaskCreateRequest,
+    TaskListResponse,
+    TaskResponse,
+    TaskUpdateRequest,
+)
+from app.schemas.user import UserRole
+from app.services.implementations.task_service import TaskService
+from app.utilities.service_utils import get_task_service
+
+router = APIRouter(
+    prefix="/tasks",
+    tags=["tasks"],
+)
+
+
+@router.post("/", response_model=TaskResponse)
+async def create_task(
+    task: TaskCreateRequest,
+    task_service: TaskService = Depends(get_task_service),
+    authorized: bool = has_roles([UserRole.ADMIN]),
+):
+    """
+    Create a new task (admin only).
+    This endpoint can also be called internally from other services to automatically create tasks.
+    """
+    try:
+        return await task_service.create_task(task)
+    except HTTPException as http_ex:
+        raise http_ex
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@router.get("/", response_model=TaskListResponse)
+async def get_tasks(
+    status: Optional[str] = Query(None, description="Filter by task status"),
+    priority: Optional[str] = Query(None, description="Filter by task priority"),
+    task_type: Optional[str] = Query(None, description="Filter by task type"),
+    assignee_id: Optional[str] = Query(None, description="Filter by assignee ID"),
+    task_service: TaskService = Depends(get_task_service),
+    authorized: bool = has_roles([UserRole.ADMIN]),
+):
+    """
+    Get all tasks with optional filters (admin only)
+    """
+    try:
+        assignee_uuid = UUID(assignee_id) if assignee_id else None
+        tasks = await task_service.get_all_tasks(
+            status=status, priority=priority, task_type=task_type, assignee_id=assignee_uuid
+        )
+        return TaskListResponse(tasks=tasks, total=len(tasks))
+    except ValueError:
+        raise HTTPException(status_code=400, detail="Invalid assignee_id format")
+    except HTTPException as http_ex:
+        raise http_ex
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@router.get("/{task_id}", response_model=TaskResponse)
+async def get_task(
+    task_id: str,
+    task_service: TaskService = Depends(get_task_service),
+    authorized: bool = has_roles([UserRole.ADMIN]),
+):
+    """
+    Get a single task by ID (admin only)
+    """
+    try:
+        return await task_service.get_task_by_id(UUID(task_id))
+    except ValueError:
+        raise HTTPException(status_code=400, detail="Invalid task ID format")
+    except HTTPException as http_ex:
+        raise http_ex
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@router.put("/{task_id}", response_model=TaskResponse)
+async def update_task(
+    task_id: str,
+    task_update: TaskUpdateRequest,
+    task_service: TaskService = Depends(get_task_service),
+    authorized: bool = has_roles([UserRole.ADMIN]),
+):
+    """
+    Update a task (admin only)
+    """
+    try:
+        return await task_service.update_task(UUID(task_id), task_update)
+    except ValueError:
+        raise HTTPException(status_code=400, detail="Invalid task ID format")
+    except HTTPException as http_ex:
+        raise http_ex
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@router.put("/{task_id}/assign", response_model=TaskResponse)
+async def assign_task(
+    task_id: str,
+    assign_request: TaskAssignRequest,
+    task_service: TaskService = Depends(get_task_service),
+    authorized: bool = has_roles([UserRole.ADMIN]),
+):
+    """
+    Assign a task to an admin user (admin only)
+    """
+    try:
+        return await task_service.assign_task(UUID(task_id), assign_request.assignee_id)
+    except ValueError:
+        raise HTTPException(status_code=400, detail="Invalid task ID format")
+    except HTTPException as http_ex:
+        raise http_ex
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@router.put("/{task_id}/complete", response_model=TaskResponse)
+async def complete_task(
+    task_id: str,
+    task_service: TaskService = Depends(get_task_service),
+    authorized: bool = has_roles([UserRole.ADMIN]),
+):
+    """
+    Mark a task as completed (admin only)
+    """
+    try:
+        return await task_service.complete_task(UUID(task_id))
+    except ValueError:
+        raise HTTPException(status_code=400, detail="Invalid task ID format")
+    except HTTPException as http_ex:
+        raise http_ex
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@router.delete("/{task_id}")
+async def delete_task(
+    task_id: str,
+    task_service: TaskService = Depends(get_task_service),
+    authorized: bool = has_roles([UserRole.ADMIN]),
+):
+    """
+    Delete a task (admin only)
+    """
+    try:
+        await task_service.delete_task(UUID(task_id))
+        return {"message": "Task deleted successfully"}
+    except ValueError:
+        raise HTTPException(status_code=400, detail="Invalid task ID format")
+    except HTTPException as http_ex:
+        raise http_ex
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))