Month: May 2019

<div class="container">
  <div class="row">
    <div class="col-xs-12 col-sm-10 col-md-8 col-sm-offset-1 col-md-offset-2">
      <ul class="list-group">
        <li
          class="list-group-item"
          *ngFor="let server of servers"
          [ngClass]="getStatusClasses(server)">
          <span
            class="badge">
            {{ server.status }}
          </span>
          <strong>{{ server.name }}</strong> |
          {{ server.instanceType | uppercase }} |
          {{ server.started | date:'fullDate' }}
        </li>
      </ul>
    </div>
  </div>
</div>

References
https://angular.io/guide/pipes#parameterizing-a-pipe

app.component.html

<div class="container">
  <div class="row">
    <div class="col-xs-12 col-sm-10 col-md-8 col-sm-offset-1 col-md-offset-2">
      <ul class="list-group">
        <li
          class="list-group-item"
          *ngFor="let server of servers"
          [ngClass]="getStatusClasses(server)">
          <span
            class="badge">
            {{ server.status }}
          </span>
          <strong>{{ server.name }}</strong> |
          {{ server.instanceType | uppercase }} |
          {{ server.started | date }}
        </li>
      </ul>
    </div>
  </div>
</div>

References
https://angular.io/guide/pipes#using-pipes

app.component.ts

import {Component, OnInit} from '@angular/core';
import {FormArray, FormControl, FormGroup, Validators} from '@angular/forms';
import {MyValidators} from './MyValidators';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit {
  genders = ['male', 'female'];
  signupForm: FormGroup;

  ngOnInit(): void {
    this.signupForm = new FormGroup({
      'userData': new FormGroup({
        'username': new FormControl(null, [Validators.required, MyValidators.forbiddenNames]),
        'email': new FormControl(null, [Validators.required, Validators.email],
          [MyValidators.forbiddenEmails])
      }),
      'gender': new FormControl('male'), // default value for radiobutton => male
      'hobbies': new FormArray([])
    });

    this.signupForm.valueChanges.subscribe(value => {
      console.log(value);
    });

    this.signupForm.get('userData.email').valueChanges.subscribe(value => {
      console.log(value);
    });

    this.signupForm.statusChanges.subscribe(value => {
      console.log(value);
    });

    this.signupForm.get('userData.email').statusChanges.subscribe(value => {
      console.log(value);
    });

    this.signupForm.setValue({
      'userData': {
        'username': 'mahmood',
        'email': '[email protected]'
      },
      'gender': 'male',
      'hobbies': []
    });

    this.signupForm.patchValue({
      'userData': {
        'username': 'mahmood2'
      }
    });
  }

  onSubmit() {
    console.log(this.signupForm);
  }

  onAddHobby() {
    const newControl = new FormControl(null, Validators.required);
    (<FormArray>this.signupForm.get('hobbies')).push(newControl);
  }

}

app.component.ts

import {Component, OnInit} from '@angular/core';
import {FormArray, FormControl, FormGroup, Validators} from '@angular/forms';
import {MyValidators} from './MyValidators';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit {
  genders = ['male', 'female'];
  signupForm: FormGroup;

  ngOnInit(): void {
    this.signupForm = new FormGroup({
      'userData': new FormGroup({
        'username': new FormControl(null, [Validators.required, MyValidators.forbiddenNames]),
        'email': new FormControl(null, [Validators.required, Validators.email],
          [MyValidators.forbiddenEmails])
      }),
      'gender': new FormControl('male'), // default value for radiobutton => male
      'hobbies': new FormArray([])
    });

    this.signupForm.valueChanges.subscribe(value => {
      console.log(value);
    });

    this.signupForm.get('userData.email').valueChanges.subscribe(value => {
      console.log(value);
    });

    this.signupForm.statusChanges.subscribe(value => {
      console.log(value);
    });

    this.signupForm.get('userData.email').statusChanges.subscribe(value => {
      console.log(value);
    });
  }

  onSubmit() {
    console.log(this.signupForm);
  }

  onAddHobby() {
    const newControl = new FormControl(null, Validators.required);
    (<FormArray>this.signupForm.get('hobbies')).push(newControl);
  }

}

MyValidators.ts

import {FormControl} from '@angular/forms';
import {Observable} from 'rxjs/Observable';

export class MyValidators {
  static forbiddenNames(control: FormControl): { [s: string]: boolean } {

    const forbidden = ['Mahmood', 'Reza', 'Ahmad'];

    if (forbidden.indexOf(control.value) !== -1) {
      return {'nameIsForbidden': true};
    }

    return null;
  }

  static forbiddenEmails(control: FormControl): Promise<any> | Observable<any> {
    const promise = new Promise<any>(((resolve, reject) => {
      setTimeout(() => {
        if (control.value === '[email protected]') {
          resolve({'emailIsForbidden': true});
        } else {
          resolve(null);
        }
      }, 1500);
    }));

    return promise;
  }
}

app.component.ts

import {Component, OnInit} from '@angular/core';
import {FormArray, FormControl, FormGroup, Validators} from '@angular/forms';
import {MyValidators} from './MyValidators';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit {
  genders = ['male', 'female'];
  signupForm: FormGroup;

  ngOnInit(): void {
    this.signupForm = new FormGroup({
      'userData': new FormGroup({
        'username': new FormControl(null, [Validators.required, MyValidators.forbiddenNames]),
        'email': new FormControl(null, [Validators.required, Validators.email],
          [MyValidators.forbiddenEmails])
      }),
      'gender': new FormControl('male'), // default value for radiobutton => male
      'hobbies': new FormArray([])
    })
    ;
  }

  onSubmit() {
    console.log(this.signupForm);
  }

  onAddHobby() {
    const newControl = new FormControl(null, Validators.required);
    (<FormArray>this.signupForm.get('hobbies')).push(newControl);
  }

}

MyValidators.ts

import {FormControl} from '@angular/forms';

export class MyValidators {
  static forbiddenNames(control: FormControl): { [s: string]: boolean } {

    const forbidden = ['Mahmood', 'Reza', 'Ahmad'];

    if (forbidden.indexOf(control.value) !== -1) {
      return {'nameIsForbidden': true};
    }

    return null;
  }
}

app.component.html

<div class="container">
  <div class="row">
    <div class="col-xs-12 col-sm-10 col-md-8 col-sm-offset-1 col-md-offset-2">
      <form [formGroup]="signupForm" (ngSubmit)="onSubmit()">
        <div formGroupName="userData">
          <div class="form-group">
            <label for="username">Username</label>
            <input
              type="text"
              id="username"
              class="form-control"
              formControlName="username">
            <span
              *ngIf="!signupForm.get('userData.username').valid && signupForm.get('userData.username').touched"
              class="help-block">
              <span *ngIf="signupForm.get('userData.username').errors['nameIsForbidden']">
              This name is invalid!
              </span>
              <span *ngIf="signupForm.get('userData.username').errors['required']">
              This field is required!
            </span>
            </span>
          </div>
          <div class="form-group">
            <label for="email">email</label>
            <input
              type="text"
              id="email"
              class="form-control"
              formControlName="email">
            <span
              *ngIf="!signupForm.get('userData.email').valid && signupForm.get('userData.email').touched"
              class="help-block">Please enter a valid email</span>
          </div>
        </div>
        <div class="radio" *ngFor="let gender of genders">
          <label>
            <input
              type="radio"
              [value]="gender"
              formControlName="gender">{{ gender }}
          </label>
        </div>
        <div formArrayName="hobbies">
          <h4>Your hobbies</h4>
          <button class="btn btn-default" type="button"
                  (click)="onAddHobby()">Add Hobby
          </button>
          <div class="form-group"
               *ngFor="let hobbyControl of signupForm.get('hobbies').controls;let i=index">
            <input type="text" class="form-control" [formControlName]="i"/>
          </div>
        </div>
        <span
          *ngIf="!signupForm.valid && signupForm.touched"
          class="help-block">Please enter valid data</span>
        <button class="btn btn-primary" type="submit">Submit</button>
      </form>
    </div>
  </div>
</div>

MyValidators.ts

import {FormControl} from '@angular/forms';

export class MyValidators {
  static forbiddenNames(control: FormControl): { [s: string]: boolean } {

    const forbidden = ['Mahmood', 'Reza', 'Ahmad'];

    if (forbidden.indexOf(control.value) !== -1) {
      return {'nameIsForbidden': true};
    }

    return null;
  }
}

app.component.ts

import {Component, OnInit} from '@angular/core';
import {FormArray, FormControl, FormGroup, Validators} from '@angular/forms';
import {MyValidators} from './MyValidators';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit {
  genders = ['male', 'female'];
  signupForm: FormGroup;

  ngOnInit(): void {
    this.signupForm = new FormGroup({
      'userData': new FormGroup({
        'username': new FormControl(null, [Validators.required, MyValidators.forbiddenNames]),
        'email': new FormControl(null, [Validators.required, Validators.email])
      }),
      'gender': new FormControl('male'), // default value for radiobutton => male
      'hobbies': new FormArray([])
    })
    ;
  }

  onSubmit() {
    console.log(this.signupForm);
  }

  onAddHobby() {
    const newControl = new FormControl(null, Validators.required);
    (<FormArray>this.signupForm.get('hobbies')).push(newControl);
  }

}

app.component.ts

import {Component, OnInit} from '@angular/core';
import {FormArray, FormControl, FormGroup, Validators} from '@angular/forms';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit {
  genders = ['male', 'female'];
  signupForm: FormGroup;

  ngOnInit(): void {
    this.signupForm = new FormGroup({
      'userData': new FormGroup({
        'username': new FormControl(null, Validators.required),
        'email': new FormControl(null, [Validators.required, Validators.email])
      }),
      'gender': new FormControl('male'), // default value for radiobutton => male
      'hobbies': new FormArray([])
    })
    ;
  }

  onSubmit() {
    console.log(this.signupForm);
  }

  onAddHobby() {
    const newControl = new FormControl(null, Validators.required);
    (<FormArray>this.signupForm.get('hobbies')).push(newControl);
  }
}

app.component.html

<div class="container">
  <div class="row">
    <div class="col-xs-12 col-sm-10 col-md-8 col-sm-offset-1 col-md-offset-2">
      <form [formGroup]="signupForm" (ngSubmit)="onSubmit()">
        <div formGroupName="userData">
          <div class="form-group">
            <label for="username">Username</label>
            <input
              type="text"
              id="username"
              class="form-control"
              formControlName="username">
            <span
              *ngIf="!signupForm.get('userData.username').valid && signupForm.get('userData.username').touched"
              class="help-block">Please enter a valid username</span>
          </div>
          <div class="form-group">
            <label for="email">email</label>
            <input
              type="text"
              id="email"
              class="form-control"
              formControlName="email">
            <span
              *ngIf="!signupForm.get('userData.email').valid && signupForm.get('userData.email').touched"
              class="help-block">Please enter a valid email</span>
          </div>
        </div>
        <div class="radio" *ngFor="let gender of genders">
          <label>
            <input
              type="radio"
              [value]="gender"
              formControlName="gender">{{ gender }}
          </label>
        </div>
        <div formArrayName="hobbies">
          <h4>Your hobbies</h4>
          <button class="btn btn-default" type="button"
                  (click)="onAddHobby()">Add Hobby
          </button>
          <div class="form-group"
               *ngFor="let hobbyControl of signupForm.get('hobbies').controls;let i=index">
            <input type="text" class="form-control" [formControlName]="i"/>
          </div>
        </div>
        <span
          *ngIf="!signupForm.valid && signupForm.touched"
          class="help-block">Please enter valid data</span>
        <button class="btn btn-primary" type="submit">Submit</button>
      </form>
    </div>
  </div>
</div>

app.component.html

<div class="container">
  <div class="row">
    <div class="col-xs-12 col-sm-10 col-md-8 col-sm-offset-1 col-md-offset-2">
      <form [formGroup]="signupForm" (ngSubmit)="onSubmit()">
        <div formGroupName="userData">
          <div class="form-group">
            <label for="username">Username</label>
            <input
              type="text"
              id="username"
              class="form-control"
              formControlName="username">
            <span
              *ngIf="!signupForm.get('userData.username').valid && signupForm.get('userData.username').touched"
              class="help-block">Please enter a valid username</span>
          </div>
          <div class="form-group">
            <label for="email">email</label>
            <input
              type="text"
              id="email"
              class="form-control"
              formControlName="email">
            <span
              *ngIf="!signupForm.get('userData.email').valid && signupForm.get('userData.email').touched"
              class="help-block">Please enter a valid email</span>
          </div>
        </div>
        <div class="radio" *ngFor="let gender of genders">
          <label>
            <input
              type="radio"
              [value]="gender"
              formControlName="gender">{{ gender }}
          </label>
        </div>
        <span
          *ngIf="!signupForm.valid && signupForm.touched"
          class="help-block">Please enter valid data</span>
        <button class="btn btn-primary" type="submit">Submit</button>
      </form>
    </div>
  </div>
</div>

app.component.ts

import {Component, OnInit} from '@angular/core';
import {FormControl, FormGroup, Validators} from '@angular/forms';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit {
  genders = ['male', 'female'];
  signupForm: FormGroup;

  ngOnInit(): void {
    this.signupForm = new FormGroup({
      'userData': new FormGroup({
        'username': new FormControl(null, Validators.required),
        'email': new FormControl(null, [Validators.required, Validators.email])
      }),
      'gender': new FormControl('male') // default value for radiobutton => male
    })
    ;
  }

  onSubmit() {
    console.log(this.signupForm);
  }
}