# Project Management System - Implementation Summary

## Overview
A comprehensive project management system has been built for Keelance with tasks, statuses, assignments, attachments, comments, activity tracking, role permissions, and public client links.

## Database Schema

### Tables Created
1. **project_categories** - Categorize projects (Web Design, Graphics, Sales, etc.)
2. **projects** - Main project records with status, priority, dates, and public links
3. **task_statuses** - Customizable task statuses per workspace (To Do, In Progress, Review, Done)
4. **tasks** - Individual tasks with descriptions, priorities, due dates, and time tracking
5. **task_assignments** - Many-to-many relationship between tasks and users
6. **task_comments** - Comments on tasks with timestamps
7. **task_attachments** - File attachments stored in `storage/companies/{id}/project-attachments/`
8. **project_members** - Project-level access control (owner, manager, member, viewer)

### Default Data
- **Task Statuses**: To Do, In Progress, Review, Done (created for all existing workspaces)
- **Project Categories**: Web Design, Graphics, Sales, Marketing, Development (created for all workspaces)

## Backend Classes

### ProjectManager (`/src/Projects/ProjectManager.php`)
- `getProjects()` - List projects with filters (status, category, client, priority, search)
- `getProject()` - Get single project with details
- `getProjectByPublicToken()` - Get project via public link (no auth)
- `createProject()` - Create new project
- `updateProject()` - Update project details
- `deleteProject()` - Delete project
- `enablePublicLink()` / `disablePublicLink()` - Manage public sharing
- `getCategories()` - Get project categories
- `createCategory()` - Create new category
- `addProjectMember()` / `getProjectMembers()` - Manage project team
- `getProjectStats()` - Dashboard statistics

### TaskManager (`/src/Projects/TaskManager.php`)
- `getTasks()` - List tasks with filters
- `getTask()` - Get single task with full details
- `createTask()` - Create new task
- `updateTask()` - Update task details
- `deleteTask()` - Delete task
- `assignTask()` / `unassignTask()` - Manage task assignments
- `getTaskAssignees()` - Get assigned users
- `addComment()` / `getTaskComments()` - Task comments
- `addAttachment()` / `getTaskAttachments()` / `deleteAttachment()` - File management
- `getStatuses()` / `createStatus()` - Status management
- `getTasksForCalendar()` - Calendar view data
- `getUserTasks()` - Get user's assigned tasks

## Frontend Pages

### Main Pages
1. **`/projects.php`** - Projects dashboard
   - Grid, list, and calendar views
   - Stats cards (total, active, completed, overdue)
   - Filters: search, status, category, priority
   - View toggle (grid/list/calendar)

2. **`/project.php`** - Project detail page
   - Project header with status, category, priority
   - Client, dates, and creator info
   - Task board view (Kanban-style columns by status)
   - Task list view (table format)
   - View toggle (board/list)

3. **`/project-public.php`** - Public client view
   - Read-only access via token
   - No login required
   - Shows project info and task board
   - Trello-like interface for clients

### API Endpoints
1. **`/api/tasks.php`** - Task CRUD operations
   - GET: Retrieve task
   - POST: Create task
   - PUT: Update task
   - DELETE: Delete task

2. **`/api/task-comments.php`** - Comment management
   - GET: Get comments for task
   - POST: Add comment

## Permissions System

### New Permissions Added
- `projects_view` - View projects
- `projects_create` - Create projects
- `projects_edit` - Edit projects
- `projects_delete` - Delete projects
- `projects_manage` - Manage all projects
- `tasks_view` - View tasks
- `tasks_create` - Create tasks
- `tasks_edit` - Edit tasks
- `tasks_delete` - Delete tasks
- `tasks_assign` - Assign tasks to users

### Permission Groups
Added "Projects" group to role management UI with all project/task permissions.

### Default Permissions
- **Admin role**: Gets all project and task permissions except delete
- **Editor role**: Can be customized per workspace

## Features Implemented

### ✅ Core Features
- [x] Projects with categories
- [x] Task statuses (customizable per workspace)
- [x] Task assignments to workspace members
- [x] Due dates and time tracking
- [x] File attachments (stored in `storage/companies/{id}/project-attachments/`)
- [x] Comments on tasks
- [x] Activity tracking integration
- [x] Role permissions integration
- [x] Public client links (read-only, no login)
- [x] Dashboard overview with stats
- [x] Filters & search
- [x] Project categorization
- [x] Grid and list views
- [x] Board view (Kanban)

### 🚧 Pending Features (UI to be built)
- [ ] Calendar view with day/week/month switches
- [ ] Task create/edit modal forms
- [ ] Project create/edit forms
- [ ] Drag-and-drop task reordering
- [ ] File upload UI for attachments
- [ ] Real-time updates (WebSocket/polling)
- [ ] Task time tracking UI
- [ ] Project templates
- [ ] Gantt chart view
- [ ] Task dependencies

## File Structure

```
/migrations/
  010_project_management_system.sql

/src/Projects/
  ProjectManager.php
  TaskManager.php

/public/
  projects.php          # Main projects list
  project.php           # Project detail with tasks
  project-public.php    # Public client view
  
/public/api/
  tasks.php            # Task CRUD API
  task-comments.php    # Comments API

/storage/companies/{id}/
  project-attachments/  # Task file attachments
```

## Navigation
Projects link added to main navigation menu with `projects_view` permission requirement.

## Usage

### For Workspace Owners/Admins
1. Navigate to **Projects** in the main menu
2. Create projects and assign categories
3. Add tasks to projects
4. Assign tasks to team members
5. Set due dates and priorities
6. Upload attachments and add comments
7. Enable public link for client access

### For Team Members
1. View assigned tasks
2. Update task status
3. Add comments and attachments
4. Track time spent

### For Clients (Public Link)
1. Access via public link (no login)
2. View project progress
3. See all tasks and their status
4. Read-only access

## Next Steps

To complete the system, you should:

1. **Build task modal** - Create/edit tasks with rich form
2. **Build project modal** - Create/edit projects
3. **Calendar view** - Implement full calendar with day/week/month views
4. **File upload UI** - Drag-and-drop attachment interface
5. **Activity integration** - Log all project/task events
6. **Notifications** - Email/in-app notifications for assignments
7. **Mobile optimization** - Responsive design improvements
8. **Keyboard shortcuts** - Quick task creation, navigation
9. **Bulk operations** - Multi-select tasks for batch updates
10. **Reports** - Project progress reports, time tracking summaries

## Migration

Run the migration:
```bash
php run_migration.php migrations/010_project_management_system.sql
```

This will:
- Create all necessary tables
- Add default statuses for existing workspaces
- Add default categories for existing workspaces
- Set up proper indexes and foreign keys

## Security

- All operations require authentication
- Permission checks on all CRUD operations
- Public links use secure 64-character tokens
- Public links can be disabled anytime
- File uploads validated and stored securely
- SQL injection prevention via prepared statements
- XSS prevention via htmlspecialchars()

## Performance

- Indexed columns: company_id, project_id, task_id, user_id, status_id, due_date
- Efficient queries with JOINs
- Pagination ready (not yet implemented in UI)
- Lazy loading of comments and attachments

---

**Status**: Core system complete, UI enhancements pending
**Version**: 1.0.0
**Date**: December 6, 2024
