Added functions to fetch requirements from db.

Added functionality to create requirements on page

backend/src/main.py

@@ -1,15 +1,19 @@
 from contextlib import asynccontextmanager
-from typing import List
-from fastapi import FastAPI, Depends, Request
+from typing import List, Optional
+from fastapi import FastAPI, Depends, Request, HTTPException, status
 from fastapi.middleware.cors import CORSMiddleware
 from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
 from fastapi.responses import RedirectResponse
 from sqlalchemy.ext.asyncio import AsyncSession
-from src.models import TokenResponse, UserInfo, GroupResponse
+from src.models import (
+    TokenResponse, UserInfo, GroupResponse, 
+    TagResponse, RequirementResponse, PriorityResponse,
+    RequirementCreateRequest, RequirementUpdateRequest
+)
 from src.controller import AuthController
 from src.config import get_openid, get_settings
 from src.database import init_db, close_db, get_db
-from src.repositories import RoleRepository, GroupRepository
+from src.repositories import RoleRepository, GroupRepository, TagRepository, RequirementRepository, PriorityRepository
 import logging
 
 # Configure logging
@@ -176,3 +180,254 @@ async def get_groups(db: AsyncSession = Depends(get_db)):
     group_repo = GroupRepository(db)
     groups = await group_repo.get_all()
     return [GroupResponse.model_validate(g) for g in groups]
+
+
+# ===========================================
+# Tags Endpoints
+# ===========================================
+
+@app.get("/api/tags", response_model=List[TagResponse])
+async def get_tags(db: AsyncSession = Depends(get_db)):
+    """
+    Get all tags.
+
+    Returns:
+        List of all tags with their codes and descriptions.
+    """
+    tag_repo = TagRepository(db)
+    tags = await tag_repo.get_all()
+    return [TagResponse.model_validate(t) for t in tags]
+
+
+@app.get("/api/tags/{tag_id}", response_model=TagResponse)
+async def get_tag(tag_id: int, db: AsyncSession = Depends(get_db)):
+    """
+    Get a specific tag by ID.
+
+    Args:
+        tag_id: The tag ID
+
+    Returns:
+        The tag if found.
+    """
+    tag_repo = TagRepository(db)
+    tag = await tag_repo.get_by_id(tag_id)
+    if not tag:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail=f"Tag with id {tag_id} not found"
+        )
+    return TagResponse.model_validate(tag)
+
+
+# ===========================================
+# Priorities Endpoints
+# ===========================================
+
+@app.get("/api/priorities", response_model=List[PriorityResponse])
+async def get_priorities(db: AsyncSession = Depends(get_db)):
+    """
+    Get all priorities.
+
+    Returns:
+        List of all priorities ordered by priority_num.
+    """
+    priority_repo = PriorityRepository(db)
+    priorities = await priority_repo.get_all()
+    return [PriorityResponse.model_validate(p) for p in priorities]
+
+
+# ===========================================
+# Requirements Endpoints
+# ===========================================
+
+def _build_requirement_response(req) -> RequirementResponse:
+    """Helper function to build RequirementResponse from a Requirement model."""
+    # Determine validation status from latest validation
+    validation_status = "Not Validated"
+    if req.validations:
+        # Get the latest validation
+        latest_validation = max(req.validations, key=lambda v: v.created_at or req.created_at)
+        validation_status = latest_validation.status.status_name if latest_validation.status else "Not Validated"
+    
+    return RequirementResponse(
+        id=req.id,
+        req_name=req.req_name,
+        req_desc=req.req_desc,
+        version=req.version,
+        created_at=req.created_at,
+        updated_at=req.updated_at,
+        tag=TagResponse.model_validate(req.tag),
+        priority=req.priority if req.priority else None,
+        groups=[GroupResponse.model_validate(g) for g in req.groups],
+        validation_status=validation_status,
+    )
+
+
+@app.get("/api/requirements", response_model=List[RequirementResponse])
+async def get_requirements(
+    group_id: Optional[int] = None,
+    tag_id: Optional[int] = None,
+    db: AsyncSession = Depends(get_db)
+):
+    """
+    Get all requirements, optionally filtered by group or tag.
+
+    Args:
+        group_id: Optional group ID to filter by
+        tag_id: Optional tag ID to filter by
+
+    Returns:
+        List of all requirements with their related data.
+    """
+    req_repo = RequirementRepository(db)
+    
+    if group_id:
+        requirements = await req_repo.get_by_group_id(group_id)
+    elif tag_id:
+        requirements = await req_repo.get_by_tag_id(tag_id)
+    else:
+        requirements = await req_repo.get_all()
+    
+    return [_build_requirement_response(req) for req in requirements]
+
+
+@app.get("/api/requirements/{requirement_id}", response_model=RequirementResponse)
+async def get_requirement(requirement_id: int, db: AsyncSession = Depends(get_db)):
+    """
+    Get a specific requirement by ID.
+
+    Args:
+        requirement_id: The requirement ID
+
+    Returns:
+        The requirement if found.
+    """
+    req_repo = RequirementRepository(db)
+    requirement = await req_repo.get_by_id(requirement_id)
+    if not requirement:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail=f"Requirement with id {requirement_id} not found"
+        )
+    return _build_requirement_response(requirement)
+
+
+@app.post("/api/requirements", response_model=RequirementResponse, status_code=status.HTTP_201_CREATED)
+async def create_requirement(
+    request: Request,
+    req_data: RequirementCreateRequest,
+    db: AsyncSession = Depends(get_db)
+):
+    """
+    Create a new requirement.
+
+    Args:
+        req_data: The requirement data
+
+    Returns:
+        The created requirement.
+    """
+    # Get the current user from cookie
+    user_info = AuthController.get_current_user(request)
+    
+    # Get the user's database ID
+    from src.repositories import UserRepository
+    user_repo = UserRepository(db)
+    user = await user_repo.get_by_sub(user_info.sub)
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="User not found in database"
+        )
+    
+    req_repo = RequirementRepository(db)
+    requirement = await req_repo.create(
+        user_id=user.id,
+        tag_id=req_data.tag_id,
+        req_name=req_data.req_name,
+        req_desc=req_data.req_desc,
+        priority_id=req_data.priority_id,
+        group_ids=req_data.group_ids,
+    )
+    
+    await db.commit()
+    return _build_requirement_response(requirement)
+
+
+@app.put("/api/requirements/{requirement_id}", response_model=RequirementResponse)
+async def update_requirement(
+    requirement_id: int,
+    request: Request,
+    req_data: RequirementUpdateRequest,
+    db: AsyncSession = Depends(get_db)
+):
+    """
+    Update an existing requirement.
+
+    Args:
+        requirement_id: The requirement ID to update
+        req_data: The updated requirement data
+
+    Returns:
+        The updated requirement.
+    """
+    # Get the current user from cookie
+    user_info = AuthController.get_current_user(request)
+    
+    # Get the user's database ID
+    from src.repositories import UserRepository
+    user_repo = UserRepository(db)
+    user = await user_repo.get_by_sub(user_info.sub)
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="User not found in database"
+        )
+    
+    req_repo = RequirementRepository(db)
+    requirement = await req_repo.update(
+        requirement_id=requirement_id,
+        editor_id=user.id,
+        req_name=req_data.req_name,
+        req_desc=req_data.req_desc,
+        tag_id=req_data.tag_id,
+        priority_id=req_data.priority_id,
+        group_ids=req_data.group_ids,
+    )
+    
+    if not requirement:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail=f"Requirement with id {requirement_id} not found"
+        )
+    
+    await db.commit()
+    return _build_requirement_response(requirement)
+
+
+@app.delete("/api/requirements/{requirement_id}", status_code=status.HTTP_204_NO_CONTENT)
+async def delete_requirement(
+    requirement_id: int,
+    request: Request,
+    db: AsyncSession = Depends(get_db)
+):
+    """
+    Delete a requirement.
+
+    Args:
+        requirement_id: The requirement ID to delete
+    """
+    # Verify user is authenticated
+    AuthController.get_current_user(request)
+    
+    req_repo = RequirementRepository(db)
+    deleted = await req_repo.delete(requirement_id)
+    
+    if not deleted:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail=f"Requirement with id {requirement_id} not found"
+        )
+    
+    await db.commit()

backend/src/models.py

@@ -1,4 +1,5 @@
 from typing import Optional, List
+from datetime import datetime
 from pydantic import BaseModel, SecretStr
 
 
@@ -35,3 +36,84 @@ class GroupResponse(BaseModel):
 class GroupListResponse(BaseModel):
     """Response schema for list of groups."""
     groups: List[GroupResponse]
+
+
+# Tag schemas
+class TagResponse(BaseModel):
+    """Response schema for a single tag."""
+    id: int
+    tag_code: str
+    tag_description: str
+
+    class Config:
+        from_attributes = True
+
+
+class TagListResponse(BaseModel):
+    """Response schema for list of tags."""
+    tags: List[TagResponse]
+
+
+# Priority schemas
+class PriorityResponse(BaseModel):
+    """Response schema for a priority."""
+    id: int
+    priority_name: str
+    priority_num: int
+
+    class Config:
+        from_attributes = True
+
+
+# Validation schemas
+class ValidationResponse(BaseModel):
+    """Response schema for a validation."""
+    id: int
+    status_name: str
+    req_version_snapshot: int
+    comment: Optional[str] = None
+    created_at: Optional[datetime] = None
+
+    class Config:
+        from_attributes = True
+
+
+# Requirement schemas
+class RequirementResponse(BaseModel):
+    """Response schema for a single requirement."""
+    id: int
+    req_name: str
+    req_desc: Optional[str] = None
+    version: int
+    created_at: Optional[datetime] = None
+    updated_at: Optional[datetime] = None
+    tag: TagResponse
+    priority: Optional[PriorityResponse] = None
+    groups: List[GroupResponse] = []
+    validation_status: Optional[str] = None  # Computed from latest validation
+
+    class Config:
+        from_attributes = True
+
+
+class RequirementListResponse(BaseModel):
+    """Response schema for list of requirements."""
+    requirements: List[RequirementResponse]
+
+
+class RequirementCreateRequest(BaseModel):
+    """Request schema for creating a requirement."""
+    tag_id: int
+    req_name: str
+    req_desc: Optional[str] = None
+    priority_id: Optional[int] = None
+    group_ids: Optional[List[int]] = None
+
+
+class RequirementUpdateRequest(BaseModel):
+    """Request schema for updating a requirement."""
+    req_name: Optional[str] = None
+    req_desc: Optional[str] = None
+    tag_id: Optional[int] = None
+    priority_id: Optional[int] = None
+    group_ids: Optional[List[int]] = None

backend/src/repositories/__init__.py

@@ -3,9 +3,15 @@ Repository layer for database operations.
 """
 from src.repositories.user_repository import UserRepository, RoleRepository
 from src.repositories.group_repository import GroupRepository
+from src.repositories.tag_repository import TagRepository
+from src.repositories.requirement_repository import RequirementRepository
+from src.repositories.priority_repository import PriorityRepository
 
 __all__ = [
     "UserRepository",
     "RoleRepository", 
     "GroupRepository",
+    "TagRepository",
+    "RequirementRepository",
+    "PriorityRepository",
 ]

backend/src/repositories/priority_repository.py

@@ -0,0 +1,76 @@
+"""
+Repository layer for Priority database operations.
+"""
+from typing import List, Optional
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+from src.db_models import Priority
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+class PriorityRepository:
+    """Repository for Priority-related database operations."""
+
+    def __init__(self, session: AsyncSession):
+        self.session = session
+
+    async def get_all(self) -> List[Priority]:
+        """
+        Get all priorities ordered by priority_num.
+        
+        Returns:
+            List of all priorities
+        """
+        result = await self.session.execute(
+            select(Priority).order_by(Priority.priority_num)
+        )
+        return list(result.scalars().all())
+
+    async def get_by_id(self, priority_id: int) -> Optional[Priority]:
+        """
+        Get a priority by ID.
+        
+        Args:
+            priority_id: The priority ID
+            
+        Returns:
+            Priority if found, None otherwise
+        """
+        result = await self.session.execute(
+            select(Priority).where(Priority.id == priority_id)
+        )
+        return result.scalar_one_or_none()
+
+    async def get_by_name(self, priority_name: str) -> Optional[Priority]:
+        """
+        Get a priority by name.
+        
+        Args:
+            priority_name: The priority name
+            
+        Returns:
+            Priority if found, None otherwise
+        """
+        result = await self.session.execute(
+            select(Priority).where(Priority.priority_name == priority_name)
+        )
+        return result.scalar_one_or_none()
+
+    async def create(self, priority_name: str, priority_num: int) -> Priority:
+        """
+        Create a new priority.
+        
+        Args:
+            priority_name: The priority name
+            priority_num: The priority number for ordering
+            
+        Returns:
+            The created Priority
+        """
+        priority = Priority(priority_name=priority_name, priority_num=priority_num)
+        self.session.add(priority)
+        await self.session.flush()
+        await self.session.refresh(priority)
+        return priority

backend/src/repositories/requirement_repository.py

@@ -0,0 +1,227 @@
+"""
+Repository layer for Requirement database operations.
+"""
+from typing import List, Optional
+from sqlalchemy import select
+from sqlalchemy.orm import selectinload
+from sqlalchemy.ext.asyncio import AsyncSession
+from src.db_models import Requirement, Group, Tag, Priority, Validation
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+class RequirementRepository:
+    """Repository for Requirement-related database operations."""
+
+    def __init__(self, session: AsyncSession):
+        self.session = session
+
+    async def get_all(self) -> List[Requirement]:
+        """
+        Get all requirements with their related data (tag, priority, groups, validations).
+        
+        Returns:
+            List of all requirements with eager-loaded relationships
+        """
+        result = await self.session.execute(
+            select(Requirement)
+            .options(
+                selectinload(Requirement.tag),
+                selectinload(Requirement.priority),
+                selectinload(Requirement.groups),
+                selectinload(Requirement.validations).selectinload(Validation.status),
+            )
+            .order_by(Requirement.created_at.desc())
+        )
+        return list(result.scalars().all())
+
+    async def get_by_id(self, requirement_id: int) -> Optional[Requirement]:
+        """
+        Get a requirement by ID with its related data.
+        
+        Args:
+            requirement_id: The requirement ID
+            
+        Returns:
+            Requirement if found, None otherwise
+        """
+        result = await self.session.execute(
+            select(Requirement)
+            .options(
+                selectinload(Requirement.tag),
+                selectinload(Requirement.priority),
+                selectinload(Requirement.groups),
+                selectinload(Requirement.validations).selectinload(Validation.status),
+                selectinload(Requirement.user),
+                selectinload(Requirement.last_editor),
+            )
+            .where(Requirement.id == requirement_id)
+        )
+        return result.scalar_one_or_none()
+
+    async def get_by_group_id(self, group_id: int) -> List[Requirement]:
+        """
+        Get all requirements belonging to a specific group.
+        
+        Args:
+            group_id: The group ID
+            
+        Returns:
+            List of requirements in the group
+        """
+        result = await self.session.execute(
+            select(Requirement)
+            .options(
+                selectinload(Requirement.tag),
+                selectinload(Requirement.priority),
+                selectinload(Requirement.groups),
+                selectinload(Requirement.validations).selectinload(Validation.status),
+            )
+            .join(Requirement.groups)
+            .where(Group.id == group_id)
+            .order_by(Requirement.created_at.desc())
+        )
+        return list(result.scalars().all())
+
+    async def get_by_tag_id(self, tag_id: int) -> List[Requirement]:
+        """
+        Get all requirements with a specific tag.
+        
+        Args:
+            tag_id: The tag ID
+            
+        Returns:
+            List of requirements with the tag
+        """
+        result = await self.session.execute(
+            select(Requirement)
+            .options(
+                selectinload(Requirement.tag),
+                selectinload(Requirement.priority),
+                selectinload(Requirement.groups),
+                selectinload(Requirement.validations).selectinload(Validation.status),
+            )
+            .where(Requirement.tag_id == tag_id)
+            .order_by(Requirement.created_at.desc())
+        )
+        return list(result.scalars().all())
+
+    async def create(
+        self,
+        user_id: int,
+        tag_id: int,
+        req_name: str,
+        req_desc: Optional[str] = None,
+        priority_id: Optional[int] = None,
+        group_ids: Optional[List[int]] = None,
+    ) -> Requirement:
+        """
+        Create a new requirement.
+        
+        Args:
+            user_id: The creating user's ID
+            tag_id: The tag ID
+            req_name: The requirement name
+            req_desc: The requirement description (optional)
+            priority_id: The priority ID (optional)
+            group_ids: List of group IDs to associate (optional)
+            
+        Returns:
+            The created Requirement
+        """
+        requirement = Requirement(
+            user_id=user_id,
+            tag_id=tag_id,
+            req_name=req_name,
+            req_desc=req_desc,
+            priority_id=priority_id,
+        )
+        
+        # Add groups if provided
+        if group_ids:
+            groups_result = await self.session.execute(
+                select(Group).where(Group.id.in_(group_ids))
+            )
+            groups = list(groups_result.scalars().all())
+            requirement.groups = groups
+        
+        self.session.add(requirement)
+        await self.session.flush()
+        await self.session.refresh(requirement)
+        
+        # Reload with relationships
+        return await self.get_by_id(requirement.id)
+
+    async def update(
+        self,
+        requirement_id: int,
+        editor_id: int,
+        req_name: Optional[str] = None,
+        req_desc: Optional[str] = None,
+        tag_id: Optional[int] = None,
+        priority_id: Optional[int] = None,
+        group_ids: Optional[List[int]] = None,
+    ) -> Optional[Requirement]:
+        """
+        Update an existing requirement.
+        
+        Args:
+            requirement_id: The requirement ID to update
+            editor_id: The ID of the user making the edit
+            req_name: New requirement name (optional)
+            req_desc: New requirement description (optional)
+            tag_id: New tag ID (optional)
+            priority_id: New priority ID (optional)
+            group_ids: New list of group IDs (optional)
+            
+        Returns:
+            The updated Requirement, or None if not found
+        """
+        requirement = await self.get_by_id(requirement_id)
+        if not requirement:
+            return None
+        
+        # Update fields if provided
+        if req_name is not None:
+            requirement.req_name = req_name
+        if req_desc is not None:
+            requirement.req_desc = req_desc
+        if tag_id is not None:
+            requirement.tag_id = tag_id
+        if priority_id is not None:
+            requirement.priority_id = priority_id
+        
+        # Set the last editor
+        requirement.last_editor_id = editor_id
+        
+        # Update groups if provided
+        if group_ids is not None:
+            groups_result = await self.session.execute(
+                select(Group).where(Group.id.in_(group_ids))
+            )
+            groups = list(groups_result.scalars().all())
+            requirement.groups = groups
+        
+        await self.session.flush()
+        await self.session.refresh(requirement)
+        
+        return await self.get_by_id(requirement_id)
+
+    async def delete(self, requirement_id: int) -> bool:
+        """
+        Delete a requirement.
+        
+        Args:
+            requirement_id: The requirement ID to delete
+            
+        Returns:
+            True if deleted, False if not found
+        """
+        requirement = await self.get_by_id(requirement_id)
+        if not requirement:
+            return False
+        
+        await self.session.delete(requirement)
+        await self.session.flush()
+        return True

backend/src/repositories/tag_repository.py

@@ -0,0 +1,76 @@
+"""
+Repository layer for Tag database operations.
+"""
+from typing import List, Optional
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+from src.db_models import Tag
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+class TagRepository:
+    """Repository for Tag-related database operations."""
+
+    def __init__(self, session: AsyncSession):
+        self.session = session
+
+    async def get_all(self) -> List[Tag]:
+        """
+        Get all tags.
+        
+        Returns:
+            List of all tags
+        """
+        result = await self.session.execute(
+            select(Tag).order_by(Tag.tag_code)
+        )
+        return list(result.scalars().all())
+
+    async def get_by_id(self, tag_id: int) -> Optional[Tag]:
+        """
+        Get a tag by ID.
+        
+        Args:
+            tag_id: The tag ID
+            
+        Returns:
+            Tag if found, None otherwise
+        """
+        result = await self.session.execute(
+            select(Tag).where(Tag.id == tag_id)
+        )
+        return result.scalar_one_or_none()
+
+    async def get_by_code(self, tag_code: str) -> Optional[Tag]:
+        """
+        Get a tag by code.
+        
+        Args:
+            tag_code: The tag code (e.g., GSR, SFR)
+            
+        Returns:
+            Tag if found, None otherwise
+        """
+        result = await self.session.execute(
+            select(Tag).where(Tag.tag_code == tag_code)
+        )
+        return result.scalar_one_or_none()
+
+    async def create(self, tag_code: str, tag_description: str) -> Tag:
+        """
+        Create a new tag.
+        
+        Args:
+            tag_code: The tag code (e.g., GSR, SFR)
+            tag_description: The tag description
+            
+        Returns:
+            The created Tag
+        """
+        tag = Tag(tag_code=tag_code, tag_description=tag_description)
+        self.session.add(tag)
+        await self.session.flush()
+        await self.session.refresh(tag)
+        return tag

frontend/src/pages/RequirementsPage.tsx

@@ -1,140 +1,108 @@
-import { useState, useEffect } from 'react'
+import React, { useState, useEffect } from 'react'
 import { useAuth } from '@/hooks'
 import { useSearchParams, Link, useNavigate } from 'react-router-dom'
+import { groupService, tagService, requirementService, priorityService } from '@/services'
+import type { Group } from '@/services/groupService'
+import type { Tag } from '@/services/tagService'
+import type { Priority } from '@/services/priorityService'
+import type { Requirement, RequirementCreateRequest } from '@/services/requirementService'
 
-// Types for requirements
-interface Requirement {
-  id: string
-  tag: string
-  title: string
-  validation: string
-  priority: number
-  progress: number
-  group: RequirementGroup
+// Helper to lighten a hex color for backgrounds
+function lightenColor(hex: string, percent: number): string {
+  const num = parseInt(hex.replace('#', ''), 16)
+  const amt = Math.round(2.55 * percent)
+  const R = (num >> 16) + amt
+  const G = (num >> 8 & 0x00FF) + amt
+  const B = (num & 0x0000FF) + amt
+  return '#' + (
+    0x1000000 +
+    (R < 255 ? (R < 1 ? 0 : R) : 255) * 0x10000 +
+    (G < 255 ? (G < 1 ? 0 : G) : 255) * 0x100 +
+    (B < 255 ? (B < 1 ? 0 : B) : 255)
+  ).toString(16).slice(1)
 }
 
-type RequirementGroup = 
-  | 'Data Services' 
-  | 'Integration' 
-  | 'Intelligence' 
-  | 'User Experience' 
-  | 'Management' 
-  | 'Trustworthiness'
-
-// Color mapping for requirement groups
-const groupColors: Record<RequirementGroup, { bg: string; border: string }> = {
-  'Data Services': { bg: 'bg-blue-200', border: 'border-blue-300' },
-  'Integration': { bg: 'bg-amber-200', border: 'border-amber-300' },
-  'Intelligence': { bg: 'bg-purple-200', border: 'border-purple-300' },
-  'User Experience': { bg: 'bg-green-200', border: 'border-green-300' },
-  'Management': { bg: 'bg-red-200', border: 'border-red-300' },
-  'Trustworthiness': { bg: 'bg-teal-600', border: 'border-teal-700' },
-}
-
-// Static mock data
-const mockRequirements: Requirement[] = [
-  {
-    id: '1',
-    tag: 'GSR#7',
-    title: 'Controle e monitoramento em right-time',
-    validation: 'Not Validated',
-    priority: 0,
-    progress: 0,
-    group: 'Trustworthiness',
-  },
-  {
-    id: '2',
-    tag: 'GSR#10',
-    title: 'Interface de software DT-externo bem definida.',
-    validation: 'Not Validated',
-    priority: 1,
-    progress: 0,
-    group: 'Intelligence',
-  },
-  {
-    id: '3',
-    tag: 'GSR#12',
-    title: 'Visualizacao',
-    validation: 'Not Validated',
-    priority: 1,
-    progress: 0,
-    group: 'User Experience',
-  },
-  {
-    id: '4',
-    tag: 'GSR#1',
-    title: 'Estado corrente atualizado',
-    validation: 'Not Validated',
-    priority: 1,
-    progress: 0,
-    group: 'Data Services',
-  },
-  {
-    id: '5',
-    tag: 'GSR#5',
-    title: 'Sincronização de dados em tempo real',
-    validation: 'Not Validated',
-    priority: 2,
-    progress: 25,
-    group: 'Data Services',
-  },
-  {
-    id: '6',
-    tag: 'GSR#8',
-    title: 'Integração com sistemas legados',
-    validation: 'Not Validated',
-    priority: 1,
-    progress: 50,
-    group: 'Integration',
-  },
-  {
-    id: '7',
-    tag: 'GSR#15',
-    title: 'Dashboard de gestão',
-    validation: 'Not Validated',
-    priority: 3,
-    progress: 0,
-    group: 'Management',
-  },
-]
-
-// Caption types
-const captionItems = [
-  { abbr: 'SFR', description: 'Specific Functional Requirement', underline: true },
-  { abbr: 'SNFR', description: 'Specific Non-Functional Requirement', underline: true },
-  { abbr: 'GNFR', description: 'Generic Non-Functional Requirement', underline: true },
-  { abbr: 'GSR', description: 'Generic Service Requirement', underline: true },
-  { abbr: 'GDR', description: 'Generic Data Requirement', underline: true },
-  { abbr: 'GCR', description: 'Generic Connection Requirement', underline: true },
-]
-
 export default function RequirementsPage() {
   const { user, logout } = useAuth()
   const [searchParams, setSearchParams] = useSearchParams()
   const navigate = useNavigate()
   
-  // State
+  // Data state
+  const [groups, setGroups] = useState<Group[]>([])
+  const [tags, setTags] = useState<Tag[]>([])
+  const [priorities, setPriorities] = useState<Priority[]>([])
+  const [requirements, setRequirements] = useState<Requirement[]>([])
+  const [loading, setLoading] = useState(true)
+  const [error, setError] = useState<string | null>(null)
+  
+  // Filter state
   const [searchQuery, setSearchQuery] = useState('')
-  const [selectedGroups, setSelectedGroups] = useState<RequirementGroup[]>([])
+  const [selectedGroups, setSelectedGroups] = useState<number[]>([])
   const [orderBy, setOrderBy] = useState<'Date' | 'Priority' | 'Name'>('Date')
   const [viewMode, setViewMode] = useState<'grid' | 'list'>('list')
   
+  // Modal state
+  const [showCreateModal, setShowCreateModal] = useState(false)
+  const [createLoading, setCreateLoading] = useState(false)
+  const [createError, setCreateError] = useState<string | null>(null)
+  
+  // Form state for new requirement
+  const [newReqName, setNewReqName] = useState('')
+  const [newReqDesc, setNewReqDesc] = useState('')
+  const [newReqTagId, setNewReqTagId] = useState<number | ''>('')
+  const [newReqPriorityId, setNewReqPriorityId] = useState<number | ''>('')
+  const [newReqGroupIds, setNewReqGroupIds] = useState<number[]>([])
+  
+  // Fetch data on mount
+  useEffect(() => {
+    const fetchData = async () => {
+      try {
+        setLoading(true)
+        setError(null)
+        
+        // Fetch groups, tags, priorities, and requirements in parallel
+        const [groupsData, tagsData, prioritiesData, requirementsData] = await Promise.all([
+          groupService.getGroups(),
+          tagService.getTags(),
+          priorityService.getPriorities(),
+          requirementService.getRequirements(),
+        ])
+        
+        setGroups(groupsData)
+        setTags(tagsData)
+        setPriorities(prioritiesData)
+        setRequirements(requirementsData)
+      } catch (err) {
+        console.error('Failed to fetch data:', err)
+        setError('Failed to load data. Please try again.')
+      } finally {
+        setLoading(false)
+      }
+    }
+    
+    fetchData()
+  }, [])
+  
   // Initialize filters from URL params
   useEffect(() => {
     const groupParam = searchParams.get('group')
-    if (groupParam) {
-      setSelectedGroups([groupParam as RequirementGroup])
+    if (groupParam && groups.length > 0) {
+      const group = groups.find(g => g.group_name === groupParam)
+      if (group) {
+        setSelectedGroups([group.id])
+      }
     }
-  }, [searchParams])
+  }, [searchParams, groups])
 
   // Filter requirements based on search and selected groups
-  const filteredRequirements = mockRequirements.filter(req => {
+  const filteredRequirements = requirements.filter(req => {
+    const tagLabel = `${req.tag.tag_code}#${req.id}`
     const matchesSearch = searchQuery === '' || 
-      req.tag.toLowerCase().includes(searchQuery.toLowerCase()) ||
-      req.title.toLowerCase().includes(searchQuery.toLowerCase())
+      tagLabel.toLowerCase().includes(searchQuery.toLowerCase()) ||
+      req.req_name.toLowerCase().includes(searchQuery.toLowerCase())
     
     const matchesGroup = selectedGroups.length === 0 || 
-      selectedGroups.includes(req.group)
+      req.groups.some(g => selectedGroups.includes(g.id))
     
     return matchesSearch && matchesGroup
   })
@@ -143,19 +111,24 @@ export default function RequirementsPage() {
   const sortedRequirements = [...filteredRequirements].sort((a, b) => {
     switch (orderBy) {
       case 'Priority':
-        return b.priority - a.priority
+        const priorityA = a.priority?.priority_num ?? 0
+        const priorityB = b.priority?.priority_num ?? 0
+        return priorityB - priorityA
       case 'Name':
-        return a.title.localeCompare(b.title)
+        return a.req_name.localeCompare(b.req_name)
+      case 'Date':
       default:
-        return 0
+        const dateA = a.created_at ? new Date(a.created_at).getTime() : 0
+        const dateB = b.created_at ? new Date(b.created_at).getTime() : 0
+        return dateB - dateA
     }
   })
 
-  const handleGroupToggle = (group: RequirementGroup) => {
+  const handleGroupToggle = (groupId: number) => {
     setSelectedGroups(prev => 
-      prev.includes(group) 
-        ? prev.filter(g => g !== group)
-        : [...prev, group]
+      prev.includes(groupId) 
+        ? prev.filter(id => id !== groupId)
+        : [...prev, groupId]
     )
   }
 
@@ -166,18 +139,128 @@ export default function RequirementsPage() {
   }
 
   const handleSearch = () => {
-    // For now, filtering is automatic - this could trigger an API call later
+    // Filtering is automatic, but this could trigger a fresh API call
   }
 
-  const handleRemove = (id: string) => {
-    // For now, just a placeholder - will connect to backend later
-    console.log('Remove requirement:', id)
+  const handleRemove = async (id: number) => {
+    if (!confirm('Are you sure you want to delete this requirement?')) {
+      return
+    }
+    
+    try {
+      await requirementService.deleteRequirement(id)
+      // Remove from local state
+      setRequirements(prev => prev.filter(r => r.id !== id))
+    } catch (err) {
+      console.error('Failed to delete requirement:', err)
+      alert('Failed to delete requirement. Please try again.')
+    }
   }
 
-  const handleDetails = (id: string) => {
+  const handleDetails = (id: number) => {
     navigate(`/requirements/${id}`)
   }
 
+  // Get the primary group color for a requirement (first group or default)
+  const getRequirementColor = (req: Requirement): string => {
+    if (req.groups.length > 0) {
+      return req.groups[0].hex_color
+    }
+    return '#6B7280' // default gray
+  }
+
+  // Modal functions
+  const openCreateModal = () => {
+    setShowCreateModal(true)
+    setCreateError(null)
+    // Reset form
+    setNewReqName('')
+    setNewReqDesc('')
+    setNewReqTagId('')
+    setNewReqPriorityId('')
+    setNewReqGroupIds([])
+  }
+
+  const closeCreateModal = () => {
+    setShowCreateModal(false)
+    setCreateError(null)
+  }
+
+  const handleCreateGroupToggle = (groupId: number) => {
+    setNewReqGroupIds(prev =>
+      prev.includes(groupId)
+        ? prev.filter(id => id !== groupId)
+        : [...prev, groupId]
+    )
+  }
+
+  const handleCreateRequirement = async (e: React.FormEvent) => {
+    e.preventDefault()
+    
+    // Validation
+    if (!newReqName.trim()) {
+      setCreateError('Requirement name is required')
+      return
+    }
+    if (!newReqTagId) {
+      setCreateError('Please select a tag')
+      return
+    }
+    
+    try {
+      setCreateLoading(true)
+      setCreateError(null)
+      
+      const data: RequirementCreateRequest = {
+        tag_id: newReqTagId as number,
+        req_name: newReqName.trim(),
+        req_desc: newReqDesc.trim() || undefined,
+        priority_id: newReqPriorityId ? (newReqPriorityId as number) : undefined,
+        group_ids: newReqGroupIds.length > 0 ? newReqGroupIds : undefined,
+      }
+      
+      const newRequirement = await requirementService.createRequirement(data)
+      
+      // Add to local state
+      setRequirements(prev => [newRequirement, ...prev])
+      
+      // Close modal
+      closeCreateModal()
+    } catch (err) {
+      console.error('Failed to create requirement:', err)
+      setCreateError('Failed to create requirement. Please try again.')
+    } finally {
+      setCreateLoading(false)
+    }
+  }
+
+  if (loading) {
+    return (
+      <div className="min-h-screen bg-white flex items-center justify-center">
+        <div className="text-center">
+          <div className="animate-spin rounded-full h-12 w-12 border-b-2 border-teal-600 mx-auto"></div>
+          <p className="mt-4 text-gray-600">Loading requirements...</p>
+        </div>
+      </div>
+    )
+  }
+
+  if (error) {
+    return (
+      <div className="min-h-screen bg-white flex items-center justify-center">
+        <div className="text-center">
+          <p className="text-red-600 mb-4">{error}</p>
+          <button
+            onClick={() => window.location.reload()}
+            className="px-4 py-2 bg-teal-600 text-white rounded hover:bg-teal-700"
+          >
+            Retry
+          </button>
+        </div>
+      </div>
+    )
+  }
+
   return (
     <div className="min-h-screen bg-white">
       {/* Header */}
@@ -236,7 +319,10 @@ export default function RequirementsPage() {
           <div className="flex-1">
             {/* New Requirement Button */}
             <div className="mb-6">
-              <button className="px-4 py-2 border border-gray-400 rounded text-sm font-medium text-gray-700 hover:bg-gray-50">
+              <button 
+                onClick={openCreateModal}
+                className="px-4 py-2 border border-gray-400 rounded text-sm font-medium text-gray-700 hover:bg-gray-50"
+              >
                 New Requirement
               </button>
             </div>
@@ -268,15 +354,15 @@ export default function RequirementsPage() {
             <div className="mb-6">
               <p className="text-sm text-gray-600 mb-3">Filter Group</p>
               <div className="grid grid-cols-3 gap-x-8 gap-y-2">
-                {(['Data Services', 'Intelligence', 'Management', 'Integration', 'User Experience', 'Trustworthiness'] as RequirementGroup[]).map((group) => (
-                  <label key={group} className="flex items-center gap-2 cursor-pointer">
+                {groups.map((group) => (
+                  <label key={group.id} className="flex items-center gap-2 cursor-pointer">
                     <input
                       type="checkbox"
-                      checked={selectedGroups.includes(group)}
-                      onChange={() => handleGroupToggle(group)}
+                      checked={selectedGroups.includes(group.id)}
+                      onChange={() => handleGroupToggle(group.id)}
                       className="w-4 h-4 rounded border-gray-300 text-teal-600 focus:ring-teal-500"
                     />
-                    <span className="text-sm text-blue-600 underline">{group}</span>
+                    <span className="text-sm text-blue-600 underline">{group.group_name}</span>
                   </label>
                 ))}
               </div>
@@ -327,30 +413,39 @@ export default function RequirementsPage() {
             {/* Requirements List */}
             <div className="space-y-4">
               {sortedRequirements.map((req) => {
-                const colors = groupColors[req.group]
+                const primaryColor = getRequirementColor(req)
+                const bgColor = lightenColor(primaryColor, 60)
+                const tagLabel = `${req.tag.tag_code}#${req.id}`
+                const priorityNum = req.priority?.priority_num ?? 0
+                const validationStatus = req.validation_status || 'Not Validated'
+                
                 return (
                   <div
                     key={req.id}
-                    className={`flex items-center border ${colors.border} rounded overflow-hidden`}
+                    className="flex items-center rounded overflow-hidden"
+                    style={{ borderColor: primaryColor, borderWidth: '1px', borderStyle: 'solid' }}
                   >
                     {/* Colored tag section */}
-                    <div className={`${colors.bg} px-4 py-4 min-w-[320px]`}>
+                    <div 
+                      className="px-4 py-4 min-w-[320px]"
+                      style={{ backgroundColor: bgColor }}
+                    >
                       <span className="font-bold text-gray-800">
-                        {req.tag} - {req.title}
+                        {tagLabel} - {req.req_name}
                       </span>
                     </div>
                     
                     {/* Validation status */}
                     <div className="flex-1 px-6 py-4 text-center">
                       <span className="text-sm text-gray-600">
-                        Validation: {req.validation}
+                        Validation: {validationStatus}
                       </span>
                     </div>
                     
-                    {/* Priority and Progress */}
+                    {/* Priority and Version */}
                     <div className="px-6 py-4 text-right">
-                      <p className="text-sm text-gray-700">Priority: {req.priority}</p>
-                      <p className="text-sm text-gray-600">{req.progress.toFixed(2)}% Done</p>
+                      <p className="text-sm text-gray-700">Priority: {priorityNum}</p>
+                      <p className="text-sm text-gray-600">Version: {req.version}</p>
                     </div>
                     
                     {/* Action buttons */}
@@ -385,10 +480,10 @@ export default function RequirementsPage() {
             <div className="border-l border-gray-200 pl-6">
               <h3 className="font-semibold text-gray-800 mb-4">Caption:</h3>
               <div className="space-y-2">
-                {captionItems.map((item) => (
-                  <p key={item.abbr} className="text-sm">
-                    <span className="text-blue-600 underline">{item.abbr}</span>
-                    <span className="text-gray-600">: {item.description}</span>
+                {tags.map((tag) => (
+                  <p key={tag.id} className="text-sm">
+                    <span className="text-blue-600 underline">{tag.tag_code}</span>
+                    <span className="text-gray-600">: {tag.tag_description}</span>
                   </p>
                 ))}
               </div>
@@ -397,6 +492,145 @@ export default function RequirementsPage() {
           </div>
         </div>
       </div>
+
+      {/* Create Requirement Modal */}
+      {showCreateModal && (
+        <div className="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center z-50">
+          <div className="bg-white rounded-lg shadow-xl w-full max-w-lg mx-4">
+            {/* Modal Header */}
+            <div className="flex items-center justify-between px-6 py-4 border-b border-gray-200">
+              <h2 className="text-xl font-semibold text-gray-800">New Requirement</h2>
+              <button
+                onClick={closeCreateModal}
+                className="text-gray-400 hover:text-gray-600"
+              >
+                <svg className="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                  <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" />
+                </svg>
+              </button>
+            </div>
+
+            {/* Modal Body */}
+            <form onSubmit={handleCreateRequirement}>
+              <div className="px-6 py-4 space-y-4">
+                {/* Error message */}
+                {createError && (
+                  <div className="p-3 bg-red-100 border border-red-400 text-red-700 rounded text-sm">
+                    {createError}
+                  </div>
+                )}
+
+                {/* Tag Selection */}
+                <div>
+                  <label className="block text-sm font-medium text-gray-700 mb-1">
+                    Tag <span className="text-red-500">*</span>
+                  </label>
+                  <select
+                    value={newReqTagId}
+                    onChange={(e) => setNewReqTagId(e.target.value ? Number(e.target.value) : '')}
+                    className="w-full px-3 py-2 border border-gray-300 rounded text-sm focus:outline-none focus:ring-2 focus:ring-teal-500 focus:border-transparent"
+                    required
+                  >
+                    <option value="">Select a tag...</option>
+                    {tags.map((tag) => (
+                      <option key={tag.id} value={tag.id}>
+                        {tag.tag_code} - {tag.tag_description}
+                      </option>
+                    ))}
+                  </select>
+                </div>
+
+                {/* Requirement Name */}
+                <div>
+                  <label className="block text-sm font-medium text-gray-700 mb-1">
+                    Name <span className="text-red-500">*</span>
+                  </label>
+                  <input
+                    type="text"
+                    value={newReqName}
+                    onChange={(e) => setNewReqName(e.target.value)}
+                    placeholder="Enter requirement name"
+                    className="w-full px-3 py-2 border border-gray-300 rounded text-sm focus:outline-none focus:ring-2 focus:ring-teal-500 focus:border-transparent"
+                    required
+                  />
+                </div>
+
+                {/* Description */}
+                <div>
+                  <label className="block text-sm font-medium text-gray-700 mb-1">
+                    Description
+                  </label>
+                  <textarea
+                    value={newReqDesc}
+                    onChange={(e) => setNewReqDesc(e.target.value)}
+                    placeholder="Enter requirement description (optional)"
+                    rows={3}
+                    className="w-full px-3 py-2 border border-gray-300 rounded text-sm focus:outline-none focus:ring-2 focus:ring-teal-500 focus:border-transparent resize-none"
+                  />
+                </div>
+
+                {/* Priority Selection */}
+                <div>
+                  <label className="block text-sm font-medium text-gray-700 mb-1">
+                    Priority
+                  </label>
+                  <select
+                    value={newReqPriorityId}
+                    onChange={(e) => setNewReqPriorityId(e.target.value ? Number(e.target.value) : '')}
+                    className="w-full px-3 py-2 border border-gray-300 rounded text-sm focus:outline-none focus:ring-2 focus:ring-teal-500 focus:border-transparent"
+                  >
+                    <option value="">Select a priority (optional)...</option>
+                    {priorities.map((priority) => (
+                      <option key={priority.id} value={priority.id}>
+                        {priority.priority_name} ({priority.priority_num})
+                      </option>
+                    ))}
+                  </select>
+                </div>
+
+                {/* Groups Selection */}
+                <div>
+                  <label className="block text-sm font-medium text-gray-700 mb-2">
+                    Groups
+                  </label>
+                  <div className="grid grid-cols-2 gap-2 max-h-40 overflow-y-auto border border-gray-200 rounded p-3">
+                    {groups.map((group) => (
+                      <label key={group.id} className="flex items-center gap-2 cursor-pointer">
+                        <input
+                          type="checkbox"
+                          checked={newReqGroupIds.includes(group.id)}
+                          onChange={() => handleCreateGroupToggle(group.id)}
+                          className="w-4 h-4 rounded border-gray-300 text-teal-600 focus:ring-teal-500"
+                        />
+                        <span className="text-sm text-gray-700">{group.group_name}</span>
+                      </label>
+                    ))}
+                  </div>
+                </div>
+              </div>
+
+              {/* Modal Footer */}
+              <div className="flex justify-end gap-3 px-6 py-4 border-t border-gray-200 bg-gray-50 rounded-b-lg">
+                <button
+                  type="button"
+                  onClick={closeCreateModal}
+                  className="px-4 py-2 border border-gray-400 rounded text-sm font-medium text-gray-700 hover:bg-gray-100"
+                  disabled={createLoading}
+                >
+                  Cancel
+                </button>
+                <button
+                  type="submit"
+                  className="px-4 py-2 bg-teal-600 text-white rounded text-sm font-medium hover:bg-teal-700 disabled:opacity-50 disabled:cursor-not-allowed"
+                  disabled={createLoading}
+                >
+                  {createLoading ? 'Creating...' : 'Create Requirement'}
+                </button>
+              </div>
+            </form>
+          </div>
+        </div>
+      )}
     </div>
   )
 }

frontend/src/services/index.ts

@@ -1,3 +1,9 @@
 export { authService } from './authService'
 export { groupService } from './groupService'
 export type { Group } from './groupService'
+export { tagService } from './tagService'
+export type { Tag } from './tagService'
+export { priorityService } from './priorityService'
+export type { Priority } from './priorityService'
+export { requirementService } from './requirementService'
+export type { Requirement, RequirementCreateRequest, RequirementUpdateRequest } from './requirementService'

frontend/src/services/priorityService.ts

@@ -0,0 +1,36 @@
+const API_BASE_URL = '/api'
+
+export interface Priority {
+  id: number
+  priority_name: string
+  priority_num: number
+}
+
+class PriorityService {
+  /**
+   * Get all priorities from the API.
+   */
+  async getPriorities(): Promise<Priority[]> {
+    try {
+      const response = await fetch(`${API_BASE_URL}/priorities`, {
+        method: 'GET',
+        credentials: 'include',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+      })
+
+      if (!response.ok) {
+        throw new Error(`HTTP error! status: ${response.status}`)
+      }
+
+      const priorities: Priority[] = await response.json()
+      return priorities
+    } catch (error) {
+      console.error('Failed to fetch priorities:', error)
+      throw error
+    }
+  }
+}
+
+export const priorityService = new PriorityService()

frontend/src/services/requirementService.ts

@@ -0,0 +1,176 @@
+import { Group } from './groupService'
+import { Tag } from './tagService'
+import { Priority } from './priorityService'
+
+const API_BASE_URL = '/api'
+
+export interface Requirement {
+  id: number
+  req_name: string
+  req_desc: string | null
+  version: number
+  created_at: string | null
+  updated_at: string | null
+  tag: Tag
+  priority: Priority | null
+  groups: Group[]
+  validation_status: string | null
+}
+
+export interface RequirementCreateRequest {
+  tag_id: number
+  req_name: string
+  req_desc?: string
+  priority_id?: number
+  group_ids?: number[]
+}
+
+export interface RequirementUpdateRequest {
+  req_name?: string
+  req_desc?: string
+  tag_id?: number
+  priority_id?: number
+  group_ids?: number[]
+}
+
+class RequirementService {
+  /**
+   * Get all requirements from the API.
+   * Optionally filter by group_id or tag_id.
+   */
+  async getRequirements(params?: { group_id?: number; tag_id?: number }): Promise<Requirement[]> {
+    try {
+      let url = `${API_BASE_URL}/requirements`
+      
+      if (params) {
+        const queryParams = new URLSearchParams()
+        if (params.group_id) queryParams.append('group_id', params.group_id.toString())
+        if (params.tag_id) queryParams.append('tag_id', params.tag_id.toString())
+        
+        const queryString = queryParams.toString()
+        if (queryString) {
+          url += `?${queryString}`
+        }
+      }
+
+      const response = await fetch(url, {
+        method: 'GET',
+        credentials: 'include',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+      })
+
+      if (!response.ok) {
+        throw new Error(`HTTP error! status: ${response.status}`)
+      }
+
+      const requirements: Requirement[] = await response.json()
+      return requirements
+    } catch (error) {
+      console.error('Failed to fetch requirements:', error)
+      throw error
+    }
+  }
+
+  /**
+   * Get a specific requirement by ID.
+   */
+  async getRequirement(requirementId: number): Promise<Requirement> {
+    try {
+      const response = await fetch(`${API_BASE_URL}/requirements/${requirementId}`, {
+        method: 'GET',
+        credentials: 'include',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+      })
+
+      if (!response.ok) {
+        throw new Error(`HTTP error! status: ${response.status}`)
+      }
+
+      const requirement: Requirement = await response.json()
+      return requirement
+    } catch (error) {
+      console.error('Failed to fetch requirement:', error)
+      throw error
+    }
+  }
+
+  /**
+   * Create a new requirement.
+   */
+  async createRequirement(data: RequirementCreateRequest): Promise<Requirement> {
+    try {
+      const response = await fetch(`${API_BASE_URL}/requirements`, {
+        method: 'POST',
+        credentials: 'include',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        body: JSON.stringify(data),
+      })
+
+      if (!response.ok) {
+        throw new Error(`HTTP error! status: ${response.status}`)
+      }
+
+      const requirement: Requirement = await response.json()
+      return requirement
+    } catch (error) {
+      console.error('Failed to create requirement:', error)
+      throw error
+    }
+  }
+
+  /**
+   * Update an existing requirement.
+   */
+  async updateRequirement(requirementId: number, data: RequirementUpdateRequest): Promise<Requirement> {
+    try {
+      const response = await fetch(`${API_BASE_URL}/requirements/${requirementId}`, {
+        method: 'PUT',
+        credentials: 'include',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        body: JSON.stringify(data),
+      })
+
+      if (!response.ok) {
+        throw new Error(`HTTP error! status: ${response.status}`)
+      }
+
+      const requirement: Requirement = await response.json()
+      return requirement
+    } catch (error) {
+      console.error('Failed to update requirement:', error)
+      throw error
+    }
+  }
+
+  /**
+   * Delete a requirement.
+   */
+  async deleteRequirement(requirementId: number): Promise<void> {
+    try {
+      const response = await fetch(`${API_BASE_URL}/requirements/${requirementId}`, {
+        method: 'DELETE',
+        credentials: 'include',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+      })
+
+      if (!response.ok) {
+        throw new Error(`HTTP error! status: ${response.status}`)
+      }
+    } catch (error) {
+      console.error('Failed to delete requirement:', error)
+      throw error
+    }
+  }
+}
+
+export const requirementService = new RequirementService()

frontend/src/services/tagService.ts

@@ -0,0 +1,61 @@
+const API_BASE_URL = '/api'
+
+export interface Tag {
+  id: number
+  tag_code: string
+  tag_description: string
+}
+
+class TagService {
+  /**
+   * Get all tags from the API.
+   */
+  async getTags(): Promise<Tag[]> {
+    try {
+      const response = await fetch(`${API_BASE_URL}/tags`, {
+        method: 'GET',
+        credentials: 'include',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+      })
+
+      if (!response.ok) {
+        throw new Error(`HTTP error! status: ${response.status}`)
+      }
+
+      const tags: Tag[] = await response.json()
+      return tags
+    } catch (error) {
+      console.error('Failed to fetch tags:', error)
+      throw error
+    }
+  }
+
+  /**
+   * Get a specific tag by ID.
+   */
+  async getTag(tagId: number): Promise<Tag> {
+    try {
+      const response = await fetch(`${API_BASE_URL}/tags/${tagId}`, {
+        method: 'GET',
+        credentials: 'include',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+      })
+
+      if (!response.ok) {
+        throw new Error(`HTTP error! status: ${response.status}`)
+      }
+
+      const tag: Tag = await response.json()
+      return tag
+    } catch (error) {
+      console.error('Failed to fetch tag:', error)
+      throw error
+    }
+  }
+}
+
+export const tagService = new TagService()