added new requirements for lessons and units

Signed-off-by: Kenneth Obsequio <k80308392@gmail.com>

controllers/admin/units.controller.js

@@ -37,6 +37,8 @@ const {
   UnitQuiz, QuizQuestion, QuizOption,
   UnitReadingProgress, LessonReadingProgress,
 } = require("../../models/courses/courses.associations");
+const CompletionRequirement = require("../../models/courses/completion_requirement.mdl");
+const { VALID_ENTITY_TYPES } = require("../../utils/courses/completion_requirements.registry");
 
 const mdl_Users = require("../../models/users/users.mdl");
 
@@ -248,6 +250,17 @@ exports.createUnitFull = async (req, res) => {
       if (lessonInput.blocks?.length > CREATE_UNIT_FULL_LIMITS.maxBlocks) {
         return R.error(res, `A lesson page can have at most ${CREATE_UNIT_FULL_LIMITS.maxBlocks} blocks.`, 400);
       }
+      if (lessonInput.requirements !== undefined) {
+        if (!Array.isArray(lessonInput.requirements)) return R.error(res, "Lesson requirements must be a list.", 400);
+        const seenTypes = new Set();
+        for (const r of lessonInput.requirements) {
+          const allowedEntityTypes = VALID_ENTITY_TYPES[r.type];
+          if (!allowedEntityTypes) return R.error(res, `Unknown requirement type "${r.type}".`, 400);
+          if (!allowedEntityTypes.includes("lesson")) return R.error(res, `"${r.type}" cannot be configured on a lesson.`, 400);
+          if (seenTypes.has(r.type)) return R.error(res, `Duplicate "${r.type}" requirement — only one per lesson is allowed.`, 400);
+          seenTypes.add(r.type);
+        }
+      }
     }
 
     const by = createdBy ?? req.user?.user_id ?? null;
@@ -278,6 +291,21 @@ exports.createUnitFull = async (req, res) => {
 
       await syncObjectivesCreate(LessonObjective, "lesson_id", lesson.lesson_id, lessonInput.objectives ?? [], t);
 
+      if (lessonInput.requirements?.length) {
+        const rows = lessonInput.requirements.map((r, ri) => ({
+          entity_type:  "lesson",
+          entity_id:    lesson.lesson_id,
+          type:         r.type,
+          order:        r.order ?? ri,
+          min_percent:  r.type === "watch_percent"   ? (r.min_percent ?? 100) : null,
+          button_label: r.type === "manual_complete" ? (r.button_label || null) : null,
+          is_required:  r.is_required ?? true,
+          createdBy:    by,
+          updatedBy:    by,
+        }));
+        await CompletionRequirement.bulkCreate(rows, { transaction: t });
+      }
+
       await UnitLesson.create({
         unit_id:     unit.unit_id,
         lesson_id:   lesson.lesson_id,