angular-crud/src/utils/crud-model-utils.ts

Generate CRUD applications with Angular, the CLI, and Schematics

import { CrudModel, Field, ShowOptions } from '../crud-module/model';
import { SchematicsException } from '@angular-devkit/schematics/src/exception/exception';
import { camelize } from '@angular-devkit/core/src/utils/strings';

export function filterField(field: Field): boolean {

  let show: string[];
  if (!field) return false;
  if (!field.show) return true;

  if (typeof field.show === 'string') {
    show = field.show.split(' ');
  } else {
    show = field.show;
  }

  const filter: ShowOptions = 'filter';
  return show.indexOf(filter) > -1;

}

export function getFilterFields(model: CrudModel): Field[] {
  if (!model.filter) return model.fields;

  return model.fields.filter(
    field => model.filter.indexOf(field.name) > -1);
}

export function getId(model: CrudModel): Field {
  let id = model.fields.find(f => f.isId);
  if (!id) throw new SchematicsException('No id found');
  return id;
}

/**
 Returns the plural form of a string
 ```javascript
 'innerHTML'.pluralize()         // 'InnerHTMLs'
 'action_name'.pluralize()       // 'actionNames'
 'css-class-name'.pluralize()    // 'cssClassNames'
 'regex'.pluralize()            // 'regexes'
 'user'.pluralize()             // 'users'
 ```
 */
export function pluralize(str: string): string {
  return camelize(
    [/([^aeiou])y$/, /()fe?$/, /([^aeiou]o|[sxz]|[cs]h)$/].map(
      (c, i) => (str = str.replace(c, `$1${'iv'[i] || ''}e`))
    ) && str + 's'
  );
}