import { Component } from '@angular/core';

@Component({
  selector: 'column-toggle-demo',
  template: `
    <div>
      <h3>
        Column Toggling
        <small>
          <a href="https://github.com/swimlane/ngx-datatable/blob/master/demo/columns/column-toggle.component.ts" target="_blank">
            Source
          </a>
        </small>
      </h3>
      <div style='float:left;width:75%'>
        <ngx-datatable
          class='material'
          [rows]='rows'
          [columns]="columns"
          [columnMode]="'force'"
          [headerHeight]="50"
          [footerHeight]="50"
          [rowHeight]="'auto'">
        </ngx-datatable>
      </div>
      <div class='selected-column'>
        <h4>Available Columns</h4>
        <ul>
          <li *ngFor='let col of allColumns'>
            <input
              type='checkbox'
              [id]="col.name"
              (click)='toggle(col)'
              [checked]='isChecked(col)'
            />
            <label [attr.for]="col.name">{{col.name}}</label>
          </li>
        </ul>
      </div>
    </div>
  `
})
export class ColumnToggleComponent {

  rows = [
    {
      name: 'Claudine Neal',
      gender: 'female',
      company: 'Sealoud'
    },
    {
      name: 'Beryl Rice',
      gender: 'female',
      company: 'Velity'
    }
  ];

  columns = [
    { name: 'Name' },
    { name: 'Gender' },
    { name: 'Company' }
  ];

  allColumns = [
    { name: 'Name' },
    { name: 'Gender' },
    { name: 'Company' }
  ];

  toggle(col) {
    const isChecked = this.isChecked(col);

    if(isChecked) {
      this.columns = this.columns.filter(c => { 
        return c.name !== col.name; 
      });
    } else {
      this.columns = [...this.columns, col];
    }
  }

  isChecked(col) {
    return this.columns.find(c => {
      return c.name === col.name;
    });
  }

}