ng-alain-component-development

What this skill does

# ng-alain Component Development Skill

This skill helps create enterprise UI components using ng-alain and ng-zorro-antd.

## Core Libraries

### @delon Packages
- **@delon/abc**: Business components (ST, SV, SEModule, etc.)
- **@delon/form**: Dynamic schema-based forms (SF)
- **@delon/auth**: Authentication and authorization
- **@delon/acl**: Access Control List
- **@delon/theme**: Theming and layout system
- **@delon/util**: Utility functions

### ng-zorro-antd
- Complete Ant Design component library
- Icons, layouts, forms, tables, modals, etc.

## Common Patterns

### 1. ST (Simple Table) Component

```typescript
import { Component, signal, inject } from '@angular/core';
import { STColumn, STData, STComponent } from '@delon/abc/st';
import { SHARED_IMPORTS } from '@shared';

@Component({
  selector: 'app-task-table',
  standalone: true,
  imports: [SHARED_IMPORTS, STComponent],
  template: `
    <st 
      [data]="tasks()" 
      [columns]="columns"
      [loading]="loading()"
      [page]="{ show: true, showSize: true }"
      (change)="handleChange($event)"
    />
  `
})
export class TaskTableComponent {
  private taskService = inject(TaskService);
  
  loading = signal(false);
  tasks = signal<STData[]>([]);
  
  columns: STColumn[] = [
    { 
      title: 'ID', 
      index: 'id', 
      width: 80,
      fixed: 'left'
    },
    { 
      title: 'Title', 
      index: 'title',
      width: 200
    },
    { 
      title: 'Status', 
      index: 'status', 
      type: 'badge',
      badge: {
        pending: { text: 'Pending', color: 'processing' },
        'in-progress': { text: 'In Progress', color: 'warning' },
        completed: { text: 'Completed', color: 'success' }
      }
    },
    {
      title: 'Assignee',
      index: 'assigneeName',
      width: 150
    },
    {
      title: 'Due Date',
      index: 'dueDate',
      type: 'date',
      dateFormat: 'yyyy-MM-dd'
    },
    {
      title: 'Actions',
      buttons: [
        {
          text: 'Edit',
          icon: 'edit',
          click: (record: any) => this.edit(record)
        },
        {
          text: 'Delete',
          icon: 'delete',
          type: 'del',
          pop: {
            title: 'Confirm delete?',
            okType: 'danger'
          },
          click: (record: any) => this.delete(record)
        }
      ]
    }
  ];
  
  ngOnInit(): void {
    this.loadTasks();
  }
  
  async loadTasks(): Promise<void> {
    this.loading.set(true);
    try {
      const tasks = await this.taskService.getTasks();
      this.tasks.set(tasks);
    } finally {
      this.loading.set(false);
    }
  }
  
  handleChange(event: any): void {
    console.log('Table change:', event);
  }
  
  edit(record: any): void {
    console.log('Edit:', record);
  }
  
  delete(record: any): void {
    console.log('Delete:', record);
  }
}
```

### 2. SF (Schema Form) Component

```typescript
import { Component, signal, inject, output } from '@angular/core';
import { SFSchema, SFComponent } from '@delon/form';
import { SHARED_IMPORTS } from '@shared';

@Component({
  selector: 'app-task-form',
  standalone: true,
  imports: [SHARED_IMPORTS, SFComponent],
  template: `
    <sf 
      [schema]="schema" 
      [loading]="loading()"
      (formSubmit)="handleSubmit($event)"
      (formChange)="handleChange($event)"
    />
  `
})
export class TaskFormComponent {
  loading = signal(false);
  taskSubmit = output<any>();
  
  schema: SFSchema = {
    properties: {
      title: {
        type: 'string',
        title: 'Task Title',
        maxLength: 200,
        ui: {
          placeholder: 'Enter task title',
          grid: { span: 24 }
        }
      },
      description: {
        type: 'string',
        title: 'Description',
        ui: {
          widget: 'textarea',
          autosize: { minRows: 3, maxRows: 6 },
          grid: { span: 24 }
        }
      },
      status: {
        type: 'string',
        title: 'Status',
        enum: [
          { label: 'Pending', value: 'pending' },
          { label: 'In Progress', value: 'in-progress' },
          { label: 'Completed', value: 'completed' }
        ],
        default: 'pending',
        ui: {
          widget: 'select',
          grid: { span: 12 }
        }
      },
      priority: {
        type: 'string',
        title: 'Priority',
        enum: [
          { label: 'Low', value: 'low' },
          { label: 'Medium', value: 'medium' },
          { label: 'High', value: 'high' }
        ],
        default: 'medium',
        ui: {
          widget: 'radio',
          grid: { span: 12 }
        }
      },
      assignee: {
        type: 'string',
        title: 'Assignee',
        ui: {
          widget: 'select',
          asyncData: () => this.loadUsers(),
          grid: { span: 12 }
        }
      },
      dueDate: {
        type: 'string',
        title: 'Due Date',
        format: 'date',
        ui: {
          widget: 'date',
          grid: { span: 12 }
        }
      },
      tags: {
        type: 'array',
        title: 'Tags',
        items: {
          type: 'string'
        },
        ui: {
          widget: 'select',
          mode: 'tags',
          grid: { span: 24 }
        }
      }
    },
    required: ['title', 'assignee'],
    ui: {
      grid: { gutter: 16 }
    }
  };
  
  handleSubmit(value: any): void {
    console.log('Form submitted:', value);
    this.taskSubmit.emit(value);
  }
  
  handleChange(value: any): void {
    console.log('Form changed:', value);
  }
  
  private async loadUsers(): Promise<any[]> {
    // Load users for assignee dropdown
    return [
      { label: 'User 1', value: 'user1' },
      { label: 'User 2', value: 'user2' }
    ];
  }
}
```

### 3. Page Header with Actions

```typescript
import { Component } from '@angular/core';
import { PageHeaderComponent } from '@delon/abc/page-header';
import { SHARED_IMPORTS } from '@shared';

@Component({
  selector: 'app-task-page',
  standalone: true,
  imports: [SHARED_IMPORTS, PageHeaderComponent],
  template: `
    <page-header 
      [title]="'Task Management'"
      [subtitle]="'Manage tasks for ' + blueprintName()"
      [breadcrumb]="breadcrumb"
    >
      <ng-template #extra>
        <button nz-button nzType="primary" (click)="createTask()">
          <i nz-icon nzType="plus"></i>
          New Task
        </button>
        <button nz-button (click)="refresh()">
          <i nz-icon nzType="reload"></i>
          Refresh
        </button>
      </ng-template>
    </page-header>
    
    <nz-card>
      <app-task-table />
    </nz-card>
  `
})
export class TaskPageComponent {
  blueprintName = signal('My Blueprint');
  
  breadcrumb = [
    { title: 'Home', link: '/' },
    { title: 'Blueprints', link: '/blueprints' },
    { title: 'Tasks' }
  ];
  
  createTask(): void {
    console.log('Create new task');
  }
  
  refresh(): void {
    console.log('Refresh tasks');
  }
}
```

### 4. ACL (Access Control)

```typescript
import { Component, inject } from '@angular/core';
import { ACLService } from '@delon/acl';
import { SHARED_IMPORTS } from '@shared';

@Component({
  selector: 'app-task-actions',
  standalone: true,
  imports: [SHARED_IMPORTS],
  template: `
    <nz-space>
      <!-- Show button only if user has permission -->
      <button 
        *nzSpaceItem
        *aclIf="'task:create'"
        nz-button 
        nzType="primary"
        (click)="create()"
      >
        Create Task
      </button>
      
      <button 
        *nzSpaceItem
        *aclIf="'task:delete'"
        nz-button 
        nzDanger
        (click)="delete()"
      >
        Delete
      </button>
      
      <!-- Check permission in code -->
      @if (canEdit()) {
        <button 
          *nzSpaceItem
          nz-button 
          (click)="edit()"
        >
          Edit
        </button>
      }
    </nz-space>
  `
})
export class TaskActionsComponent {
  private aclService = inject(ACLService);
  
  canEdit = signal(false);
  
  ngOnInit(): vo