This is my first major form with validations and more. I've set up a Registration form and I'm utilizing ng-messages for validation. The issue arises when I have to check the username, whether it already exists in the JSON server we are using or if it's available. If it's taken, a warning message appears in the HTML near the username input; if it's available, the submit button becomes enabled (as the form will be $valid) allowing the user to proceed with the registration process. I intend to use angular-sanitize because I discovered this snippet of code:
ngModel.$asyncValidators.uniqueUsername = function(modelValue, viewValue) {
var value = modelValue || viewValue;
// Looking up user by username
return $http.get('/api/users/' + value).
then(function resolved() {
// Username exists, meaning validation fails
return $q.reject('exists');
}, function rejected() {
// Username does not exist, therefore this validation passes
return true;
});
};
Below is the current code I am using (registration form, controller, and service):
// Controller:
export default class registerPageController {
constructor(userService, authenticationService, $location) {
this.register = "Register";
this.userService = userService;
this.$location = $location;
this.authenticationService = authenticationService;
this.hasLoggedIn = false;
}
onSubmit(user) {
let self = this;
let {
name,
age,
email,
username,
password
} = user;
self.userService.register(name, age, email, username, password).then((res) => {
self.userService.login(username, password).then(function (response) {
let data = response.data;
if (data.length) {
let user = data[0];
self.hasLoggedIn = true;
self.authenticationService.setCredentials(username, password);
self.$location.path('/');
}
});
})
.catch(err => {
// WHAT TO PUT HERE AFTER THE USERNAME EXISTS VALIDATION ?
})
}
}
// Service:
export class UserService {
constructor($http) {
this.$http = $http;
}
login(username, password) {
return this.$http({
method: 'GET',
url: 'http://localhost:3000/users',
params: {
username: username,
password: password
}
});
}
register(name, age, email, username, password) {
return this.$http({
method: 'POST',
url: 'http://localhost:3000/users',
data: {
name: name,
age: age,
email: email,
username: username,
password: password
}
});
}
// SHOULD I PUT THE USERNAME EXISTS VALIDATION LOGIC HERE?
}<div class="container main-content">
<form class="registrationForm" name="registerForm" ng-submit="register.onSubmit(register.user)" novalidate="novalidate">
<!-- Enter Name -->
<div class="form-group">
<label for="name" class="control-label"><span id="reqInfo">*</span> Name</label>
<input type="text" name="name" class="form-control" ng-model="register.user.name" ng-pattern="/[a-zA-Zа-яА-Я]+/" id="name"
required="" placeholder="Example: Petar Petrov">
<div ng-messages="registerForm.name.$error" ng-show="registerForm.name.$touched" style="color:maroon" role="alert">
<div ng-message="required">Your name is required</div>
</div>
</div>
<!-- User Age-->
<div class="form-group">
<label for="age" class="control-label"><span id="reqInfo">*</span> Age</label>
<input type="number" name="age" class="form-control" ng-model="register.user.age" ng-min="18" min="18" id="age" required=""
placeholder="Enter your age">
<div ng-messages="registerForm.age.$error" ng-show="registerForm.age.$touched" style="color:maroon" role="alert">
<div ng-message="min">You must be at least 18 years old</div>
</div>
</div>
<!-- Enter E-mail -->
<div class="form-group">
<label for="email" class="control-label"><span id="reqInfo">*</span> E-mail</label>
<input type="email" name="email" class="form-control" ng-model="register.user.email" ng-pattern="/((([A-Za-z]{3,9}:(?:\/\/)?)(?:[\-;:&=\+\$,\w]+@)?[A-Za-z0-9\.\-]+|(?:www\.|[\-;:&=\+\$,\w]+@)[A-Za-z0-9\.\-]+)((?:\/[\+~%\/\.\w\-_]*)?\??(?:[\-\+=&;%@\.\w_]*)#?(?:[\.\!\/\\\w]*))?)/"
id="email" required="" placeholder="Example: <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="6805090104280509010446060d1c">[email protected]</a>">
<div ng-messages="registerForm.email.$error" ng-show="registerForm.email.$touched" style="color:maroon" role="alert">
<div ng-message="required">Your valid e-mail is required</div>
</div>
<br>
<!-- Enter Username -->
<div class="form-group">
<label for="username" class="control-label"><span id="reqInfo">*</span> Username</label>
<input type="text" name="username" ng-minlength="5" ng-maxlength="20" class="form-control" ng-model="register.user.username"
ng-pattern="/^[A-Za-z0-9_]{1,32}$/" ng-minlength="7" id="username" required="" placeholder="Enter your username">
<div ng-messages="registerForm.username.$error" style="color:maroon" role="alert">
<div ng-message="minlength">Your Username must be between 7 and 20 characters long</div>
</div>
<br>
<!-- Enter Password -->
<div class="form-group">
<label for="password" class="control-label"><span id="reqInfo">*</span> Password</label>
<input type="password" name="password" class="form-control" ng-model="register.user.password" ng-minlength="7" id="password"
required="" placeholder="Enter your password">
<div ng-messages="registerForm.password.$error" style="color:maroon" role="alert">
<div ng-message="minlength">Your Password must be at least 7 symbols long</div>
</div>
</div>
<!-- Register button -->
<div class="form-group">
<button class="btn btn-primary" type="submit" ng-disabled="!registerForm.name.$valid || !registerForm.age.$valid || !registerForm.email.$valid || !registerForm.username.$valid || !registerForm.password.$valid">Register</button>
</div>
<p>Fields with <span id="reqInfo">*</span> must be filled.</p>
</form>
</div>I have been instructed to write in ES6 specifically and I am facing issues with the logic. Please review my code and provide guidance on how to complete it so that I can use it effectively and most importantly, learn from it. Thank you very much in advance!