remove codeigniter

app/Models/TeacherClass.php

@@ -56,7 +56,7 @@ class TeacherClass extends BaseModel
 
     public function classSection(): BelongsTo
     {
-        // CI frequently joins on classSection.class_section_id
+        // legacy frequently joins on classSection.class_section_id
         return $this->belongsTo(ClassSection::class, 'class_section_id', 'class_section_id');
     }
 
@@ -95,18 +95,18 @@ class TeacherClass extends BaseModel
     }
 
     /* ============================================================
-     * CI-compatible methods (converted)
+     * legacy-compatible methods (converted)
      * ============================================================
      */
 
-    /** CI: getClassSectionIdByUserId() */
+    /** legacy: getClassSectionIdByUserId() */
     public static function getClassSectionIdByUserId(int $userId): ?self
     {
         return static::query()->forTeacher($userId)->first();
     }
 
     /**
-     * CI: getClassAssignmentsByUserId()
+     * legacy: getClassAssignmentsByUserId()
      * Returns array rows with:
      * class_section_pk, class_section_id, class_section_name, class_id, class_name, teacher_id, teacher_role, school_year, semester
      */
@@ -171,7 +171,7 @@ class TeacherClass extends BaseModel
             ->all();
     }
 
-    /** CI: getClassSectionsByTeacherId() */
+    /** legacy: getClassSectionsByTeacherId() */
     public static function getClassSectionsByTeacherId(int $teacherId): array
     {
         $rows = DB::table('teacher_class as tc')
@@ -194,7 +194,7 @@ class TeacherClass extends BaseModel
         ];
     }
 
-    /** CI: getClassByTeacherId() */
+    /** legacy: getClassByTeacherId() */
     public static function getClassByTeacherId(int $teacherId): array
     {
         return DB::table('teacher_class as tc')
@@ -207,7 +207,7 @@ class TeacherClass extends BaseModel
             ->all();
     }
 
-    /** CI: getTeacherIdByClassSection($classSectionName, $semester, $schoolYear) */
+    /** legacy: getTeacherIdByClassSection($classSectionName, $semester, $schoolYear) */
     public static function getTeacherIdByClassSection(string $classSectionName, string $semester, string $schoolYear): ?int
     {
         $classSectionName = trim($classSectionName);
@@ -232,12 +232,12 @@ class TeacherClass extends BaseModel
         return $teacherId ? (int) $teacherId : null;
     }
 
-    /** CI: getMainTeacherBySection($classSectionName, $semester, $schoolYear) */
+    /** legacy: getMainTeacherBySection($classSectionName, $semester, $schoolYear) */
     public static function getMainTeacherBySection(string $classSectionName, string $semester, string $schoolYear): ?array
     {
         $row = DB::table('classSection as cs')
             ->selectRaw('u.id AS teacher_id, u.firstname, u.lastname')
-            // IMPORTANT: your CI code had tc.class_section_id = cs.id in one place (PK join),
+            // IMPORTANT: your legacy code had tc.class_section_id = cs.id in one place (PK join),
             // but most of your code uses class_section_id code join.
             // Here we keep the "code join" for consistency:
             ->join('teacher_class as tc', 'tc.class_section_id', '=', 'cs.class_section_id')
@@ -251,7 +251,7 @@ class TeacherClass extends BaseModel
     }
 
     /**
-     * CI: assignTeacherToClass()
+     * legacy: assignTeacherToClass()
      * Upsert by (teacher_id, class_section_id, school_year, position) and touch updated_at.
      */
     public static function assignTeacherToClass(
@@ -286,8 +286,8 @@ class TeacherClass extends BaseModel
     }
 
     /**
-     * CI: getAssignedClassSections()
-     * NOTE: your CI joins classSection.id = teacher_class.class_section_id (PK join).
+     * legacy: getAssignedClassSections()
+     * NOTE: your legacy joins classSection.id = teacher_class.class_section_id (PK join).
      * If your teacher_class.class_section_id is actually a section CODE, change join to cs.class_section_id.
      */
     public static function getAssignedClassSections(int $teacherId, string $schoolYear, string $semester): array
@@ -304,7 +304,7 @@ class TeacherClass extends BaseModel
     }
 
     /**
-     * CI: assignedForSectionTerm()
+     * legacy: assignedForSectionTerm()
      * Returns rows: class_section_id, teacher_id, position, firstname, lastname
      *
      * @param  int|null  $alsoSectionCode  When teacher_class rows use the section PK while $sectionCode
@@ -347,7 +347,7 @@ class TeacherClass extends BaseModel
             ->all();
     }
 
-    /** CI: assignedMapForSectionTerm() */
+    /** legacy: assignedMapForSectionTerm() */
     public static function assignedMapForSectionTerm(
         int $sectionCode,
         string $semester,
@@ -363,7 +363,7 @@ class TeacherClass extends BaseModel
     }
 
     /**
-     * CI: assignedBySectionForTerm()
+     * legacy: assignedBySectionForTerm()
      * Returns: [sectionCode] => [rows...]
      */
     public static function assignedBySectionForTerm(string $semester, string $schoolYear, ?array $onlySectionCodes = null): array