Improve registration

 * Add ability to set the user display name
 * Use display name to guess the username/channel name
 * Add explanations about what is the purpose of a username/channel name
 * Add a loader at the "done" step

12 files changed, 153 insertions, 46 deletions

diff --git a/client/src/app/+my-account/my-account-settings/my-account-profile/my-account-profile.component.ts b/client/src/app/+my-account/my-account-settings/my-account-profile/my-account-profile.component.ts
index a9503ed1b..fcad5a6c2 100644
--- a/client/src/app/+my-account/my-account-settings/my-account-profile/my-account-profile.component.ts
+++ b/client/src/app/+my-account/my-account-settings/my-account-profile/my-account-profile.component.ts
@@ -30,7 +30,7 @@ export class MyAccountProfileComponent extends FormReactive implements OnInit {
 
   ngOnInit () {
     this.buildForm({
-      'display-name': this.userValidatorsService.USER_DISPLAY_NAME,
+      'display-name': this.userValidatorsService.USER_DISPLAY_NAME_REQUIRED,
       description: this.userValidatorsService.USER_DESCRIPTION
     })
 
diff --git a/client/src/app/+signup/+register/register-step-channel.component.html b/client/src/app/+signup/+register/register-step-channel.component.html
index 68ea4473a..253374f87 100644
--- a/client/src/app/+signup/+register/register-step-channel.component.html
+++ b/client/src/app/+signup/+register/register-step-channel.component.html
@@ -12,6 +12,21 @@
   </div>
 
   <div class="form-group">
+    <label for="displayName" i18n>Channel display name</label>
+
+    <div class="input-group">
+      <input
+        type="text" id="displayName"
+        formControlName="displayName" [ngClass]="{ 'input-error': formErrors['displayName'] }"
+      >
+    </div>
+
+    <div *ngIf="formErrors.displayName" class="form-error">
+      {{ formErrors.displayName }}
+    </div>
+  </div>
+
+  <div class="form-group">
     <label for="name" i18n>Channel name</label>
 
     <div class="input-group">
@@ -24,6 +39,10 @@
       </div>
     </div>
 
+    <div class="name-information" i18n>
+      The channel name is a unique identifier of your channel on this instance. It's like an address mail, so other people can find your channel.
+    </div>
+
     <div *ngIf="formErrors.name" class="form-error">
       {{ formErrors.name }}
     </div>
@@ -32,19 +51,4 @@
       Channel name cannot be the same than your account name. You can click on the first step to update your account name.
     </div>
   </div>
-
-  <div class="form-group">
-    <label for="displayName" i18n>Channel display name</label>
-
-    <div class="input-group">
-      <input
-        type="text" id="displayName"
-        formControlName="displayName" [ngClass]="{ 'input-error': formErrors['displayName'] }"
-      >
-    </div>
-
-    <div *ngIf="formErrors.displayName" class="form-error">
-      {{ formErrors.displayName }}
-    </div>
-  </div>
 </form>
diff --git a/client/src/app/+signup/+register/register-step-channel.component.ts b/client/src/app/+signup/+register/register-step-channel.component.ts
index 9e13f75b3..e434b91a7 100644
--- a/client/src/app/+signup/+register/register-step-channel.component.ts
+++ b/client/src/app/+signup/+register/register-step-channel.component.ts
@@ -1,8 +1,10 @@
 import { Component, EventEmitter, Input, OnInit, Output } from '@angular/core'
 import { AuthService } from '@app/core'
-import { FormReactive, VideoChannelValidatorsService } from '@app/shared'
+import { FormReactive, UserService, VideoChannelValidatorsService } from '@app/shared'
 import { FormValidatorService } from '@app/shared/forms/form-validators/form-validator.service'
 import { FormGroup } from '@angular/forms'
+import { pairwise } from 'rxjs/operators'
+import { concat, of } from 'rxjs'
 
 @Component({
   selector: 'my-register-step-channel',
@@ -16,6 +18,7 @@ export class RegisterStepChannelComponent extends FormReactive implements OnInit
   constructor (
     protected formValidatorService: FormValidatorService,
     private authService: AuthService,
+    private userService: UserService,
     private videoChannelValidatorsService: VideoChannelValidatorsService
   ) {
     super()
@@ -25,16 +28,29 @@ export class RegisterStepChannelComponent extends FormReactive implements OnInit
     return window.location.host
   }
 
-  isSameThanUsername () {
-    return this.username && this.username === this.form.value['name']
-  }
-
   ngOnInit () {
     this.buildForm({
-      name: this.videoChannelValidatorsService.VIDEO_CHANNEL_NAME,
-      displayName: this.videoChannelValidatorsService.VIDEO_CHANNEL_DISPLAY_NAME
+      displayName: this.videoChannelValidatorsService.VIDEO_CHANNEL_DISPLAY_NAME,
+      name: this.videoChannelValidatorsService.VIDEO_CHANNEL_NAME
     })
 
     setTimeout(() => this.formBuilt.emit(this.form))
+
+    concat(
+      of(''),
+      this.form.get('displayName').valueChanges
+    ).pipe(pairwise())
+     .subscribe(([ oldValue, newValue ]) => this.onDisplayNameChange(oldValue, newValue))
+  }
+
+  isSameThanUsername () {
+    return this.username && this.username === this.form.value['name']
+  }
+
+  private onDisplayNameChange (oldDisplayName: string, newDisplayName: string) {
+    const name = this.form.value['name'] || ''
+
+    const newName = this.userService.getNewUsername(oldDisplayName, newDisplayName, name)
+    this.form.patchValue({ name: newName })
   }
 }
diff --git a/client/src/app/+signup/+register/register-step-user.component.html b/client/src/app/+signup/+register/register-step-user.component.html
index cd0c78bfa..47b3be8cc 100644
--- a/client/src/app/+signup/+register/register-step-user.component.html
+++ b/client/src/app/+signup/+register/register-step-user.component.html
@@ -1,6 +1,21 @@
 <form role="form" [formGroup]="form">
 
   <div class="form-group">
+    <label for="displayName" i18n>Display name</label>
+
+    <div class="input-group">
+      <input
+        type="text" id="displayName" placeholder="John Doe"
+        formControlName="displayName" [ngClass]="{ 'input-error': formErrors['displayName'] }"
+      >
+    </div>
+
+    <div *ngIf="formErrors.displayName" class="form-error">
+      {{ formErrors.displayName }}
+    </div>
+  </div>
+
+  <div class="form-group">
     <label for="username" i18n>Username</label>
 
     <div class="input-group">
@@ -13,6 +28,10 @@
       </div>
     </div>
 
+    <div class="name-information" i18n>
+      The username is a unique identifier of your account on this instance. It's like an address mail, so other people can find you.
+    </div>
+
     <div *ngIf="formErrors.username" class="form-error">
       {{ formErrors.username }}
     </div>
diff --git a/client/src/app/+signup/+register/register-step-user.component.ts b/client/src/app/+signup/+register/register-step-user.component.ts
index 3825ae371..3b71fd3c4 100644
--- a/client/src/app/+signup/+register/register-step-user.component.ts
+++ b/client/src/app/+signup/+register/register-step-user.component.ts
@@ -1,8 +1,10 @@
 import { Component, EventEmitter, OnInit, Output } from '@angular/core'
 import { AuthService } from '@app/core'
-import { FormReactive, UserValidatorsService } from '@app/shared'
+import { FormReactive, UserService, UserValidatorsService } from '@app/shared'
 import { FormValidatorService } from '@app/shared/forms/form-validators/form-validator.service'
 import { FormGroup } from '@angular/forms'
+import { pairwise } from 'rxjs/operators'
+import { concat, of } from 'rxjs'
 
 @Component({
   selector: 'my-register-step-user',
@@ -15,6 +17,7 @@ export class RegisterStepUserComponent extends FormReactive implements OnInit {
   constructor (
     protected formValidatorService: FormValidatorService,
     private authService: AuthService,
+    private userService: UserService,
     private userValidatorsService: UserValidatorsService
   ) {
     super()
@@ -26,6 +29,7 @@ export class RegisterStepUserComponent extends FormReactive implements OnInit {
 
   ngOnInit () {
     this.buildForm({
+      displayName: this.userValidatorsService.USER_DISPLAY_NAME_REQUIRED,
       username: this.userValidatorsService.USER_USERNAME,
       password: this.userValidatorsService.USER_PASSWORD,
       email: this.userValidatorsService.USER_EMAIL,
@@ -33,5 +37,18 @@ export class RegisterStepUserComponent extends FormReactive implements OnInit {
     })
 
     setTimeout(() => this.formBuilt.emit(this.form))
+
+    concat(
+      of(''),
+      this.form.get('displayName').valueChanges
+    ).pipe(pairwise())
+     .subscribe(([ oldValue, newValue ]) => this.onDisplayNameChange(oldValue, newValue))
+  }
+
+  private onDisplayNameChange (oldDisplayName: string, newDisplayName: string) {
+    const username = this.form.value['username'] || ''
+
+    const newUsername = this.userService.getNewUsername(oldDisplayName, newDisplayName, username)
+    this.form.patchValue({ username: newUsername })
   }
 }
diff --git a/client/src/app/+signup/+register/register.component.html b/client/src/app/+signup/+register/register.component.html
index 24def68c1..d7e47c1a8 100644
--- a/client/src/app/+signup/+register/register.component.html
+++ b/client/src/app/+signup/+register/register.component.html
@@ -27,6 +27,12 @@
         </cdk-step>
 
         <cdk-step i18n-label label="Done" editable="false">
+          <div *ngIf="!signupDone && !error" class="done-loader">
+            <my-loader [loading]="true"></my-loader>
+
+            <div i18n>PeerTube is creating your account...</div>
+          </div>
+
           <div *ngIf="error" class="alert alert-danger">{{ error }}</div>
         </cdk-step>
       </my-custom-stepper>
diff --git a/client/src/app/+signup/+register/register.component.scss b/client/src/app/+signup/+register/register.component.scss
index 6f61b78f7..8d14992e7 100644
--- a/client/src/app/+signup/+register/register.component.scss
+++ b/client/src/app/+signup/+register/register.component.scss
@@ -56,3 +56,26 @@ button {
   @include peertube-button;
   @include orange-button;
 }
+
+.name-information {
+  margin-top: 10px;
+}
+
+.done-loader {
+  display: flex;
+  justify-content: center;
+  flex-direction: column;
+  align-items: center;
+
+  my-loader {
+    margin-bottom: 20px;
+
+    /deep/ .loader div {
+      border-color: var(--mainColor) transparent transparent transparent;
+    }
+
+    & + div {
+      font-size: 15px;
+    }
+  }
+}
diff --git a/client/src/app/shared/forms/form-validators/user-validators.service.ts b/client/src/app/shared/forms/form-validators/user-validators.service.ts
index 6589b2580..2dafb1816 100644
--- a/client/src/app/shared/forms/form-validators/user-validators.service.ts
+++ b/client/src/app/shared/forms/form-validators/user-validators.service.ts
@@ -12,7 +12,7 @@ export class UserValidatorsService {
   readonly USER_VIDEO_QUOTA: BuildFormValidator
   readonly USER_VIDEO_QUOTA_DAILY: BuildFormValidator
   readonly USER_ROLE: BuildFormValidator
-  readonly USER_DISPLAY_NAME: BuildFormValidator
+  readonly USER_DISPLAY_NAME_REQUIRED: BuildFormValidator
   readonly USER_DESCRIPTION: BuildFormValidator
   readonly USER_TERMS: BuildFormValidator
 
@@ -85,18 +85,7 @@ export class UserValidatorsService {
       }
     }
 
-    this.USER_DISPLAY_NAME = {
-      VALIDATORS: [
-        Validators.required,
-        Validators.minLength(1),
-        Validators.maxLength(50)
-      ],
-      MESSAGES: {
-        'required': this.i18n('Display name is required.'),
-        'minlength': this.i18n('Display name must be at least 1 character long.'),
-        'maxlength': this.i18n('Display name cannot be more than 50 characters long.')
-      }
-    }
+    this.USER_DISPLAY_NAME_REQUIRED = this.getDisplayName(true)
 
     this.USER_DESCRIPTION = {
       VALIDATORS: [
@@ -129,4 +118,22 @@ export class UserValidatorsService {
       }
     }
   }
+
+  private getDisplayName (required: boolean) {
+    const control = {
+      VALIDATORS: [
+        Validators.minLength(1),
+        Validators.maxLength(120)
+      ],
+      MESSAGES: {
+        'required': this.i18n('Display name is required.'),
+        'minlength': this.i18n('Display name must be at least 1 character long.'),
+        'maxlength': this.i18n('Display name cannot be more than 50 characters long.')
+      }
+    }
+
+    if (required) control.VALIDATORS.push(Validators.required)
+
+    return control
+  }
 }
diff --git a/client/src/app/shared/misc/loader.component.html b/client/src/app/shared/misc/loader.component.html
index b8b7ad343..ca8ed063e 100644
--- a/client/src/app/shared/misc/loader.component.html
+++ b/client/src/app/shared/misc/loader.component.html
@@ -1,5 +1,5 @@
 <div *ngIf="loading">
-  <div class="lds-ring">
+  <div class="loader">
     <div></div>
     <div></div>
     <div></div>
diff --git a/client/src/app/shared/misc/loader.component.scss b/client/src/app/shared/misc/loader.component.scss
index ddb64f07a..ffac9c707 100644
--- a/client/src/app/shared/misc/loader.component.scss
+++ b/client/src/app/shared/misc/loader.component.scss
@@ -3,14 +3,14 @@
 
 // Thanks to https://loading.io/css/ (CC0 License)
 
-.lds-ring {
+.loader {
   display: inline-block;
   position: relative;
   width: 50px;
   height: 50px;
 }
 
-.lds-ring div {
+.loader div {
   box-sizing: border-box;
   display: block;
   position: absolute;
@@ -19,23 +19,23 @@
   margin: 6px;
   border: 4px solid;
   border-radius: 50%;
-  animation: lds-ring 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
+  animation: loader 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
   border-color: #999999 transparent transparent transparent;
 }
 
-.lds-ring div:nth-child(1) {
+.loader div:nth-child(1) {
   animation-delay: -0.45s;
 }
 
-.lds-ring div:nth-child(2) {
+.loader div:nth-child(2) {
   animation-delay: -0.3s;
 }
 
-.lds-ring div:nth-child(3) {
+.loader div:nth-child(3) {
   animation-delay: -0.15s;
 }
 
-@keyframes lds-ring {
+@keyframes loader {
   0% {
     transform: rotate(0deg);
   }
diff --git a/client/src/app/shared/users/user.service.ts b/client/src/app/shared/users/user.service.ts
index 20883456f..70ff9a058 100644
--- a/client/src/app/shared/users/user.service.ts
+++ b/client/src/app/shared/users/user.service.ts
@@ -136,6 +136,22 @@ export class UserService {
       .pipe(catchError(res => this.restExtractor.handleError(res)))
   }
 
+  getNewUsername (oldDisplayName: string, newDisplayName: string, currentUsername: string) {
+    // Don't update display name, the user seems to have changed it
+    if (this.displayNameToUsername(oldDisplayName) !== currentUsername) return currentUsername
+
+    return this.displayNameToUsername(newDisplayName)
+  }
+
+  displayNameToUsername (displayName: string) {
+    if (!displayName) return ''
+
+    return displayName
+      .toLowerCase()
+      .replace(/\s/g, '_')
+      .replace(/[^a-z0-9_.]/g, '')
+  }
+
   /* ###### Admin methods ###### */
 
   addUser (userCreate: UserCreate) {
diff --git a/client/src/app/videos/+video-edit/video-add-components/video-import-torrent.component.ts b/client/src/app/videos/+video-edit/video-add-components/video-import-torrent.component.ts
index ed9cb5840..e47624dd6 100644
--- a/client/src/app/videos/+video-edit/video-add-components/video-import-torrent.component.ts
+++ b/client/src/app/videos/+video-edit/video-add-components/video-import-torrent.component.ts
@@ -100,7 +100,6 @@ export class VideoImportTorrentComponent extends VideoSend implements OnInit, Ca
           previewUrl: null
         }))
 
-
         this.hydrateFormFromVideo()
       },