{
  "database": {
    "schema": "attendance_system",
    "source": "src-backup/attendance_system.sql",
    "engine": "MariaDB 10.4.32",
    "tables": [
      {
        "name": "activities",
        "purpose": "Defines school activities/events that require attendance tracking and can be scoped to all students, specific courses, or departments.",
        "primary_key": "id",
        "important_fields": [
          "name",
          "date",
          "time_in",
          "time_out",
          "required_students",
          "course_id",
          "department_id",
          "status"
        ],
        "relationships": [
          {
            "column": "created_by",
            "references": "users.id",
            "on_delete": "RESTRICT"
          },
          {
            "column": "course_id",
            "references": "courses.id",
            "on_delete": "SET NULL"
          },
          {
            "column": "department_id",
            "references": "departments.id",
            "on_delete": "SET NULL"
          }
        ]
      },
      {
        "name": "attendance",
        "purpose": "Records per-student participation in a given activity, capturing time-in/out, status, and notes.",
        "primary_key": "id",
        "important_fields": [
          "student_id",
          "activity_id",
          "time_in",
          "time_out",
          "status"
        ],
        "relationships": [
          {
            "column": "student_id",
            "references": "students.id",
            "on_delete": "CASCADE"
          },
          {
            "column": "activity_id",
            "references": "activities.id",
            "on_delete": "CASCADE"
          }
        ]
      },
      {
        "name": "attendance_logs",
        "purpose": "Audit trail for changes to attendance entries (time in/out, manual overrides, status changes).",
        "primary_key": "id",
        "important_fields": [
          "attendance_id",
          "action",
          "old_value",
          "new_value",
          "changed_by",
          "changed_at"
        ],
        "relationships": [
          {
            "column": "attendance_id",
            "references": "attendance.id",
            "on_delete": "CASCADE"
          },
          {
            "column": "changed_by",
            "references": "users.id",
            "on_delete": "RESTRICT"
          }
        ]
      },
      {
        "name": "attendance_records",
        "purpose": "Aggregated attendance summary per student/course combination when manual recording (outside activities) is needed.",
        "primary_key": "id",
        "important_fields": [
          "student_id",
          "course_id",
          "status",
          "date_recorded",
          "created_by"
        ],
        "relationships": [
          {
            "column": "student_id",
            "references": "students.id",
            "on_delete": "RESTRICT"
          },
          {
            "column": "course_id",
            "references": "courses.id",
            "on_delete": "RESTRICT"
          },
          {
            "column": "created_by",
            "references": "users.id",
            "on_delete": "RESTRICT"
          }
        ]
      },
      {
        "name": "courses",
        "purpose": "Catalog of academic programs, linked to departments and used to scope activities and students.",
        "primary_key": "id",
        "important_fields": [
          "code",
          "name",
          "department_id",
          "duration_years",
          "status"
        ],
        "relationships": [
          {
            "column": "department_id",
            "references": "departments.id",
            "on_delete": "RESTRICT"
          }
        ]
      },
      {
        "name": "departments",
        "purpose": "Defines school departments under which courses and students are organized.",
        "primary_key": "id",
        "important_fields": [
          "code",
          "name",
          "school_id",
          "status"
        ],
        "relationships": [
          {
            "column": "school_id",
            "references": "schools.id",
            "on_delete": "RESTRICT"
          }
        ]
      },
      {
        "name": "genders",
        "purpose": "Lookup table for student gender classifications.",
        "primary_key": "id",
        "important_fields": [
          "code",
          "name"
        ]
      },
      {
        "name": "schools",
        "purpose": "Stores root institution profile information (name, address, contacts).",
        "primary_key": "id",
        "important_fields": [
          "code",
          "name",
          "address",
          "contact_number",
          "status"
        ]
      },
      {
        "name": "students",
        "purpose": "Master list of students with QR credentials, demographic data, and enrollment metadata.",
        "primary_key": "id",
        "important_fields": [
          "student_id",
          "qr_code",
          "full_name",
          "gender_id",
          "year_level",
          "course_id",
          "department_id",
          "school_id",
          "status"
        ],
        "relationships": [
          {
            "column": "gender_id",
            "references": "genders.id",
            "on_delete": "RESTRICT"
          },
          {
            "column": "course_id",
            "references": "courses.id",
            "on_delete": "RESTRICT"
          },
          {
            "column": "department_id",
            "references": "departments.id",
            "on_delete": "RESTRICT"
          },
          {
            "column": "school_id",
            "references": "schools.id",
            "on_delete": "RESTRICT"
          }
        ]
      },
      {
        "name": "system_settings",
        "purpose": "Key-value configuration store for system-wide toggles (branding, cutoff times, etc.).",
        "primary_key": "id",
        "important_fields": [
          "setting_key",
          "setting_value",
          "description",
          "updated_by",
          "updated_at"
        ],
        "relationships": [
          {
            "column": "updated_by",
            "references": "users.id",
            "on_delete": "SET NULL"
          }
        ]
      },
      {
        "name": "users",
        "purpose": "System user accounts (admins/teachers) with authentication credentials and contact info.",
        "primary_key": "id",
        "important_fields": [
          "username",
          "password",
          "role",
          "full_name",
          "email",
          "status"
        ]
      }
    ]
  },
  "systems": [
    {
      "name": "Admin Panel",
      "path": "src-backup/admin",
      "purpose": "Web dashboard for managing students, activities, users, and attendance reports.",
      "entry_points": [
        "dashboard.php",
        "manage_students.php",
        "manage_activities.php",
        "attendance.php",
        "users.php",
        "reports.php"
      ],
      "primary_tables": [
        "students",
        "activities",
        "attendance",
        "users"
      ],
      "dependencies": [
        "auth/login.php",
        "includes/database.php",
        "includes/auth.php"
      ]
    },
    {
      "name": "Public Portal",
      "path": "src-backup/index.php",
      "purpose": "Front-facing landing/entry page that ties into assets/ for styling and qr/ for QR workflows.",
      "primary_tables": [
        "students",
        "attendance",
        "activities"
      ],
      "dependencies": [
        "assets/css|js",
        "auth/login.php",
        "api/*"
      ]
    },
    {
      "name": "API Endpoints",
      "path": "src-backup/api",
      "purpose": "AJAX-style endpoints for scanning QR codes, manual attendance entry, and fetching reference data.",
      "key_scripts": [
        "scan_qr.php",
        "manual_entry.php",
        "get_courses.php",
        "get_departments.php",
        "export_activities.php",
        "export_reports.php"
      ],
      "primary_tables": [
        "students",
        "attendance",
        "activities",
        "courses",
        "departments"
      ],
      "dependencies": [
        "includes/database.php",
        "includes/config.php"
      ]
    },
    {
      "name": "Authentication",
      "path": "src-backup/auth",
      "purpose": "Session handling (login/logout) that protects admin and API surfaces.",
      "key_scripts": [
        "login.php",
        "logout.php"
      ],
      "primary_tables": [
        "users"
      ],
      "dependencies": [
        "includes/auth.php",
        "includes/database.php"
      ]
    },
    {
      "name": "Shared Includes",
      "path": "src-backup/includes",
      "purpose": "Reusable bootstrap/config files (database connector, auth helper, headers/footers, QR library).",
      "key_scripts": [
        "database.php",
        "config.php",
        "auth.php",
        "header.php",
        "footer.php"
      ],
      "primary_tables": [
        "users",
        "students",
        "activities"
      ]
    },
    {
      "name": "QR Utilities",
      "path": "src-backup/qr",
      "purpose": "Handles QR code generation, printing, and cleanup jobs tied to student credentials.",
      "key_scripts": [
        "generate.php",
        "print.php",
        "cleanup_qrcodes.php",
        "simple_cleanup.php"
      ],
      "primary_tables": [
        "students"
      ],
      "dependencies": [
        "includes/phpqrcode",
        "assets/image"
      ]
    },
    {
      "name": "Reporting",
      "path": "src-backup/reports",
      "purpose": "Generates printable reports for attendance summaries and student listings.",
      "key_scripts": [
        "print_report.php",
        "students_report.php"
      ],
      "primary_tables": [
        "attendance",
        "students",
        "activities",
        "courses"
      ]
    },
    {
      "name": "Assets",
      "path": "src-backup/assets",
      "purpose": "Static resources (CSS/JS/images) shared by public and admin interfaces.",
      "subdirectories": [
        "css",
        "js",
        "image"
      ]
    },
    {
      "name": "Setup & Diagnostics",
      "path": "src-backup/setup.php | src-backup/test_connection.php | src-backup/test_db.php",
      "purpose": "Environment bootstrap scripts used to verify database connectivity and initial configuration.",
      "primary_tables": [
        "system_settings",
        "users"
      ]
    },
    {
      "name": "Exports",
      "path": "src-backup/exports",
      "purpose": "Designated output directory (currently empty) where generated CSV/PDF exports are saved by API/export scripts."
    }
  ]
}