platform/docs/assets/diagrams/flows/README.md

Flow Diagrams

Request Lifecycle

The request_lifecycle.mmd diagram shows the complete lifecycle of an HTTP request through our framework, including:

1. Entry Points

• Client HTTP Request
• Server Reception
• Kernel Handling

2. Middleware Processing

1. Global Middleware

   • Maintenance Mode Check
   • Post Size Validation
   • String Trimming
   • Empty to Null Conversion

2. Route Middleware

   • Authentication
   • Authorization
   • Throttling
   • CSRF Protection

3. Response Middleware

   • Session Handling
   • Cookie Processing
   • Header Management
   • Response Compression

3. Core Processing

1. Route Resolution

   • Pattern Matching
   • Parameter Binding
   • Controller Resolution

2. Controller Handling

   • Action Execution
   • Parameter Injection
   • Response Generation

4. Service Layer

1. Business Logic

   • Service Processing
   • Data Validation
   • Business Rules

2. Data Operations

   • Database Queries
   • Cache Access
   • File Operations

5. Event System

1. Event Types

   • Model Events
   • Custom Events
   • System Events

2. Event Processing

   • Synchronous Events
   • Queued Events
   • Broadcast Events

Event Processing

The event_processing.mmd diagram shows the complete lifecycle of events through our framework, including:

1. Event Sources

• System Components
• User Actions
• External Triggers
• Scheduled Tasks

2. Event Types

1. Immediate Events

   • Synchronous Processing
   • Direct Response
   • In-Memory Handling

2. Queued Events

   • Asynchronous Processing
   • Background Jobs
   • Delayed Execution

3. Broadcast Events

   • Real-time Updates
   • WebSocket Integration
   • Channel Broadcasting

3. Processing Components

1. Event Dispatcher

   • Event Creation
   • Type Detection
   • Handler Resolution
   • Event Routing

2. Queue System

   • Job Queuing
   • Background Processing
   • Retry Handling
   • Failed Job Management

3. Broadcaster

   • Channel Management
   • Real-time Delivery
   • Client Connections
   • Message Formatting

4. Event Listeners

   • Event Handling
   • Business Logic
   • Response Generation
   • Error Handling

4. Integration Points

1. Database Operations

   • Transaction Management
   • Data Persistence
   • State Changes
   • Audit Logging

2. Cache Operations

   • Cache Invalidation
   • Cache Updates
   • Performance Optimization
   • State Management

3. Event Subscribers

   • Multiple Event Handling
   • Event Grouping
   • Subscriber Management
   • Event Filtering

5. Channel Types

1. Public Channels

   • Open Access
   • Public Events
   • General Updates

2. Private Channels

   • Authentication Required
   • User-Specific Events
   • Secure Communication

3. Presence Channels

   • User Presence
   • Online Status
   • User Lists
   • Real-time State

Queue Processing

The queue_processing.mmd diagram shows the complete lifecycle of queued jobs through our framework, including:

1. Job Sources

• Application Code
• Event Listeners
• Scheduled Tasks
• External Triggers

2. Job States

1. Pending

   • Initial State
   • Awaiting Processing
   • In Queue

2. Reserved

   • Worker Assigned
   • Being Processed
   • Locked for Processing

3. Released

   • Failed Attempt
   • Ready for Retry
   • Back in Queue

4. Failed

   • Max Retries Exceeded
   • Permanent Failure
   • Requires Attention

3. Processing Components

1. Queue Manager

   • Job Registration
   • Queue Selection
   • Job Scheduling
   • State Management

2. Queue Worker

   • Job Processing
   • Error Handling
   • Retry Management
   • Resource Cleanup

3. Job Handler

   • Business Logic
   • Data Processing
   • Event Dispatching
   • Error Reporting

4. Failed Jobs

   • Failure Logging
   • Retry Tracking
   • Error Analysis
   • Admin Notification

4. Integration Points

1. Database Operations

   • Job Storage
   • State Tracking
   • Transaction Management
   • Failure Logging

2. Event System

   • Job Events
   • Status Updates
   • Error Notifications
   • Progress Tracking

3. Queue Monitor

   • Health Checks
   • Performance Metrics
   • Worker Status
   • Error Rates

5. Processing Types

1. Immediate Processing

   • Direct Execution
   • No Delay
   • Synchronous Option

2. Delayed Processing

   • Scheduled Execution
   • Time-based Delays
   • Future Processing

3. Batch Processing

   • Multiple Jobs
   • Grouped Execution
   • Bulk Operations

4. Chained Processing

   • Sequential Jobs
   • Dependent Tasks
   • Pipeline Processing

6. Retry Strategy

1. Exponential Backoff

   • Increasing Delays
   • Retry Limits
   • Failure Thresholds

2. Custom Delays

   • Job-specific Timing
   • Conditional Delays
   • Priority-based

3. Max Attempts

   • Attempt Limits
   • Failure Handling
   • Final State

Model Lifecycle

The model_lifecycle.mmd diagram shows the complete lifecycle of models through our framework, including:

1. Model Operations

1. Creation

   • Instance Creation
   • Event Dispatching
   • Database Insertion
   • Cache Management

2. Retrieval

   • Cache Checking
   • Database Query
   • Relationship Loading
   • Model Hydration

3. Update

   • Change Tracking
   • Event Dispatching
   • Database Update
   • Cache Invalidation

4. Deletion

   • Event Dispatching
   • Database Deletion
   • Cache Clearing
   • Relationship Cleanup

2. Event Integration

1. Lifecycle Events

   • Creating/Created
   • Updating/Updated
   • Deleting/Deleted
   • Retrieved/Saving

2. Relationship Events

   • Loading Relations
   • Relation Loaded
   • Relation Updated
   • Relation Deleted

3. Cache Events

   • Cache Hit/Miss
   • Cache Stored
   • Cache Invalidated
   • Cache Cleared

3. Processing Components

1. Model Instance

   • Attribute Management
   • Change Tracking
   • Event Dispatching
   • State Management

2. Event System

   • Event Creation
   • Observer Notification
   • Queue Integration
   • Event Broadcasting

3. Cache Layer

   • Cache Checking
   • Cache Storage
   • Cache Invalidation
   • Cache Strategy

4. Database Layer

   • Query Execution
   • Record Management
   • Transaction Handling
   • Relationship Loading

4. Integration Points

1. Observer System

   • Lifecycle Hooks
   • Event Handling
   • State Tracking
   • Custom Logic

2. Cache Strategy

   • Read Through
   • Write Behind
   • Cache Invalidation
   • Cache Tags

3. Queue Integration

   • Event Queueing
   • Job Processing
   • Async Operations
   • Retry Handling

5. Model States

1. Pending

   • New Instance
   • Not Persisted
   • No Events

2. Active

   • Persisted
   • Trackable
   • Observable

3. Modified

   • Changes Tracked
   • Events Pending
   • Cache Invalid

4. Deleted

   • Soft Deleted
   • Hard Deleted
   • Cache Cleared

6. Performance Features

1. Eager Loading

   • Relationship Loading
   • Query Optimization
   • N+1 Prevention

2. Cache Management

   • Query Cache
   • Model Cache
   • Relationship Cache

3. Batch Operations

   • Bulk Insert
   • Bulk Update
   • Bulk Delete

Rendering the Diagrams

Using Mermaid CLI

# Install Mermaid CLI
npm install -g @mermaid-js/mermaid-cli

# Generate SVG
mmdc -i request_lifecycle.mmd -o request_lifecycle.svg
mmdc -i event_processing.mmd -o event_processing.svg
mmdc -i queue_processing.mmd -o queue_processing.svg
mmdc -i model_lifecycle.mmd -o model_lifecycle.svg

# Generate PNG
mmdc -i request_lifecycle.mmd -o request_lifecycle.png
mmdc -i event_processing.mmd -o event_processing.png
mmdc -i queue_processing.mmd -o queue_processing.png
mmdc -i model_lifecycle.mmd -o model_lifecycle.png

Using Online Tools

1. Visit Mermaid Live Editor
2. Copy content of .mmd files
3. Export as SVG or PNG

Using VSCode

1. Install "Markdown Preview Mermaid Support" extension
2. Open .mmd files
3. Use preview to view diagrams

Modifying the Diagrams

Sequence Structure

sequenceDiagram
    participant A
    participant B
    
    A->>B: Message
    activate B
    B-->>A: Response
    deactivate B
    
    Note over A,B: Description

Style Definitions

style Client fill:#f9f,stroke:#333,stroke-width:2px
style Server fill:#bbf,stroke:#333,stroke-width:2px
style Kernel fill:#bbf,stroke:#333,stroke-width:2px
style Pipeline fill:#bfb,stroke:#333,stroke-width:2px

Adding Components

1. Add participant declaration
2. Add message sequences
3. Add activation/deactivation
4. Add notes and descriptions

Component Interactions

1. Request Processing

sequenceDiagram
    Client->>Server: Request
    Server->>Kernel: Handle
    Kernel->>Pipeline: Process

2. Middleware Chain

sequenceDiagram
    Kernel->>Pipeline: Global Middleware
    Pipeline->>Pipeline: Route Middleware
    Pipeline->>Pipeline: Response Middleware

3. Business Logic

sequenceDiagram
    Controller->>Services: Process
    Services->>DB: Query
    Services->>Events: Dispatch

4. Event Flow

sequenceDiagram
    Source->>Dispatcher: Dispatch Event
    Dispatcher->>Queue: Queue Event
    Queue->>Listeners: Process Later

5. Broadcasting

sequenceDiagram
    Dispatcher->>Broadcast: Send Event
    Broadcast->>Clients: Real-time Update
    Clients-->>Broadcast: Received

6. Queue Processing

sequenceDiagram
    Source->>Queue: Dispatch Job
    Queue->>Worker: Process Job
    Worker->>Handler: Execute Job
    Handler-->>Worker: Job Complete

7. Model Operations

sequenceDiagram
    Client->>Model: Create/Update/Delete
    Model->>Events: Dispatch Event
    Events->>Observer: Handle Event
    Model->>DB: Persist Changes
    Model->>Cache: Update Cache

Component Details

HTTP Layer

• Server: Handles raw HTTP requests
• Kernel: Manages request processing
• Pipeline: Executes middleware chain
• Router: Matches routes to controllers

Processing Layer

• Controller: Handles business logic
• Services: Processes domain logic
• Events: Manages system events
• Database: Handles data persistence

Event System

• Dispatcher: Central event hub
• Queue: Async processing
• Broadcast: Real-time updates
• Listeners: Event handlers

Queue System

• Manager: Queue management
• Worker: Job processing
• Handler: Job execution
• Monitor: Health checks

Model System

• Model: Data representation
• Observer: Event handling
• Cache: Performance layer
• Relations: Relationship management

Integration Points

• Database: Data persistence
• Cache: Performance layer
• Subscribers: Event consumers
• External Systems: Third-party services

Processing Types

• Synchronous: Immediate processing
• Asynchronous: Queued processing
• Real-time: Broadcast processing
• Batch: Grouped processing

Event Categories

• System Events: Framework operations
• Domain Events: Business logic
• User Events: User actions
• Integration Events: External systems

Best Practices

1. Adding Sequences

• Use clear message names
• Show activation state
• Add relevant notes
• Group related actions

2. Updating Flow

• Maintain sequence order
• Show parallel operations
• Indicate async processes
• Document timing

3. Maintaining Style

• Use consistent colors
• Keep clear spacing
• Add helpful notes
• Use proper arrows

4. Documentation

• Update README.md
• Explain changes
• Document new flows
• Keep synchronized

5. Event Design

• Use clear event names
• Include necessary data
• Consider async needs
• Plan broadcast strategy

6. Queue Management

• Set appropriate delays
• Handle failures
• Monitor queue size
• Implement retries

7. Broadcast Strategy

• Choose correct channels
• Manage authentication
• Handle disconnections
• Optimize payload

8. Error Handling

• Log failures
• Implement retries
• Notify administrators
• Maintain state

9. Model Operations

• Track changes
• Manage cache
• Handle events
• Optimize queries

Questions?

For questions about flow diagrams:

1. Check diagram documentation
2. Review Mermaid syntax
3. Consult team leads
4. Update documentation