feat: introduce Joi validation schemas and integrate them across various controllers for categories, lessons, courses, chapters, announcements, and admin course approvals.

Backend/src/validators/ChaptersLesson.validator.ts

@@ -0,0 +1,186 @@
+import Joi from 'joi';
+
+// Multi-language validation schema
+const multiLangSchema = Joi.object({
+    th: Joi.string().required().messages({
+        'any.required': 'Thai text is required'
+    }),
+    en: Joi.string().required().messages({
+        'any.required': 'English text is required'
+    })
+}).required();
+
+const multiLangOptionalSchema = Joi.object({
+    th: Joi.string().optional(),
+    en: Joi.string().optional()
+}).optional();
+
+// ============================================
+// Chapter Validators
+// ============================================
+
+/**
+ * Validator for creating a chapter
+ */
+export const CreateChapterValidator = Joi.object({
+    title: multiLangSchema.messages({
+        'any.required': 'Title is required'
+    }),
+    description: multiLangOptionalSchema,
+    sort_order: Joi.number().integer().min(0).optional()
+});
+
+/**
+ * Validator for updating a chapter
+ */
+export const UpdateChapterValidator = Joi.object({
+    title: multiLangOptionalSchema,
+    description: multiLangOptionalSchema,
+    sort_order: Joi.number().integer().min(0).optional(),
+    is_published: Joi.boolean().optional()
+});
+
+/**
+ * Validator for reordering a chapter
+ */
+export const ReorderChapterValidator = Joi.object({
+    sort_order: Joi.number().integer().min(0).required().messages({
+        'any.required': 'Sort order is required',
+        'number.min': 'Sort order must be at least 0'
+    })
+});
+
+// ============================================
+// Lesson Validators
+// ============================================
+
+/**
+ * Validator for creating a lesson
+ */
+export const CreateLessonValidator = Joi.object({
+    title: multiLangSchema.messages({
+        'any.required': 'Title is required'
+    }),
+    content: multiLangOptionalSchema,
+    type: Joi.string().valid('VIDEO', 'QUIZ').required().messages({
+        'any.only': 'Type must be either VIDEO or QUIZ',
+        'any.required': 'Type is required'
+    }),
+    sort_order: Joi.number().integer().min(0).optional()
+});
+
+/**
+ * Validator for updating a lesson
+ */
+export const UpdateLessonValidator = Joi.object({
+    title: multiLangOptionalSchema,
+    content: multiLangOptionalSchema,
+    duration_minutes: Joi.number().min(0).optional().messages({
+        'number.min': 'Duration must be at least 0'
+    }),
+    sort_order: Joi.number().integer().min(0).optional(),
+    prerequisite_lesson_ids: Joi.array().items(Joi.number().integer().positive()).optional(),
+    is_published: Joi.boolean().optional()
+});
+
+/**
+ * Validator for reordering lessons
+ */
+export const ReorderLessonsValidator = Joi.object({
+    lesson_id: Joi.number().integer().positive().required().messages({
+        'any.required': 'Lesson ID is required'
+    }),
+    sort_order: Joi.number().integer().min(0).required().messages({
+        'any.required': 'Sort order is required'
+    })
+});
+
+// ============================================
+// Quiz Question Validators
+// ============================================
+
+/**
+ * Validator for quiz choice
+ */
+const QuizChoiceValidator = Joi.object({
+    text: multiLangSchema.messages({
+        'any.required': 'Choice text is required'
+    }),
+    is_correct: Joi.boolean().required().messages({
+        'any.required': 'is_correct is required'
+    }),
+    sort_order: Joi.number().integer().min(0).optional()
+});
+
+/**
+ * Validator for adding a question to a quiz
+ */
+export const AddQuestionValidator = Joi.object({
+    question: multiLangSchema.messages({
+        'any.required': 'Question is required'
+    }),
+    explanation: multiLangOptionalSchema,
+    question_type: Joi.string()
+        .valid('MULTIPLE_CHOICE', 'TRUE_FALSE', 'SHORT_ANSWER')
+        .required()
+        .messages({
+            'any.only': 'Question type must be MULTIPLE_CHOICE, TRUE_FALSE, or SHORT_ANSWER',
+            'any.required': 'Question type is required'
+        }),
+    sort_order: Joi.number().integer().min(0).optional(),
+    choices: Joi.array().items(QuizChoiceValidator).min(1).optional().messages({
+        'array.min': 'At least one choice is required for multiple choice questions'
+    })
+});
+
+/**
+ * Validator for updating a question
+ */
+export const UpdateQuestionValidator = Joi.object({
+    question: multiLangOptionalSchema,
+    explanation: multiLangOptionalSchema,
+    question_type: Joi.string()
+        .valid('MULTIPLE_CHOICE', 'TRUE_FALSE', 'SHORT_ANSWER')
+        .optional()
+        .messages({
+            'any.only': 'Question type must be MULTIPLE_CHOICE, TRUE_FALSE, or SHORT_ANSWER'
+        }),
+    sort_order: Joi.number().integer().min(0).optional(),
+    choices: Joi.array().items(QuizChoiceValidator).min(1).optional().messages({
+        'array.min': 'At least one choice is required'
+    })
+});
+
+/**
+ * Validator for reordering a question
+ */
+export const ReorderQuestionValidator = Joi.object({
+    sort_order: Joi.number().integer().min(0).required().messages({
+        'any.required': 'Sort order is required',
+        'number.min': 'Sort order must be at least 0'
+    })
+});
+
+// ============================================
+// Quiz Settings Validator
+// ============================================
+
+/**
+ * Validator for updating quiz settings
+ */
+export const UpdateQuizValidator = Joi.object({
+    title: multiLangOptionalSchema,
+    description: multiLangOptionalSchema,
+    passing_score: Joi.number().min(0).max(100).optional().messages({
+        'number.min': 'Passing score must be at least 0',
+        'number.max': 'Passing score must not exceed 100'
+    }),
+    time_limit: Joi.number().min(0).optional().messages({
+        'number.min': 'Time limit must be at least 0'
+    }),
+    shuffle_questions: Joi.boolean().optional(),
+    shuffle_choices: Joi.boolean().optional(),
+    show_answers_after_completion: Joi.boolean().optional(),
+    is_skippable: Joi.boolean().optional(),
+    allow_multiple_attempts: Joi.boolean().optional()
+});