2 files changed, 32 insertions, 8 deletions

diff --git a/client/src/app/shared/form-validators/video-chapter-validators.ts b/client/src/app/shared/form-validators/video-chapter-validators.ts
new file mode 100644
index 000000000..cbbd9291e
--- /dev/null
+++ b/client/src/app/shared/form-validators/video-chapter-validators.ts
@@ -0,0 +1,32 @@
+import { AbstractControl, ValidationErrors, ValidatorFn, Validators } from '@angular/forms'
+import { BuildFormValidator } from './form-validator.model'
+
+export const VIDEO_CHAPTER_TITLE_VALIDATOR: BuildFormValidator = {
+  VALIDATORS: [ Validators.minLength(2), Validators.maxLength(100) ], // Required is set dynamically
+  MESSAGES: {
+    required: $localize`A chapter title is required.`,
+    minlength: $localize`A chapter title should be more than 2 characters long.`,
+    maxlength: $localize`A chapter title should be less than 100 characters long.`
+  }
+}
+
+export const VIDEO_CHAPTERS_ARRAY_VALIDATOR: BuildFormValidator = {
+  VALIDATORS: [ uniqueTimecodeValidator() ],
+  MESSAGES: {}
+}
+
+function uniqueTimecodeValidator (): ValidatorFn {
+  return (control: AbstractControl): ValidationErrors => {
+    const array = control.value as { timecode: number, title: string }[]
+
+    for (const chapter of array) {
+      if (!chapter.title) continue
+
+      if (array.filter(c => c.title && c.timecode === chapter.timecode).length > 1) {
+        return { uniqueTimecode: $localize`Multiple chapters have the same timecode ${chapter.timecode}` }
+      }
+    }
+
+    return null
+  }
+}
diff --git a/client/src/app/shared/form-validators/video-validators.ts b/client/src/app/shared/form-validators/video-validators.ts
index 090a76e43..a434c777f 100644
--- a/client/src/app/shared/form-validators/video-validators.ts
+++ b/client/src/app/shared/form-validators/video-validators.ts
@@ -70,14 +70,6 @@ export const VIDEO_DESCRIPTION_VALIDATOR: BuildFormValidator = {
   }
 }
 
-export const VIDEO_TAG_VALIDATOR: BuildFormValidator = {
-  VALIDATORS: [ Validators.minLength(2), Validators.maxLength(30) ],
-  MESSAGES: {
-    minlength: $localize`A tag should be more than 2 characters long.`,
-    maxlength: $localize`A tag should be less than 30 characters long.`
-  }
-}
-
 export const VIDEO_TAGS_ARRAY_VALIDATOR: BuildFormValidator = {
   VALIDATORS: [ Validators.maxLength(5), arrayTagLengthValidator() ],
   MESSAGES: {