Implement user-specific question numbering and update database schema. Added triggers for automatic question numbering and adjustments upon deletion. Enhanced CRUD operations to manage user_question_number effectively.

database/schema.sql

@@ -31,6 +31,7 @@ CREATE TABLE questions (
     answered_at DATETIME,
     is_read BOOLEAN DEFAULT FALSE,
     status TEXT DEFAULT 'pending' CHECK (status IN ('pending', 'answered', 'rejected', 'deleted')),
+    user_question_number INTEGER,
     
     -- Внешние ключи
     FOREIGN KEY (from_user_id) REFERENCES users(telegram_id) ON DELETE CASCADE,
@@ -76,6 +77,8 @@ CREATE INDEX idx_questions_from_user_id ON questions(from_user_id);
 CREATE INDEX idx_questions_status ON questions(status);
 CREATE INDEX idx_questions_created_at ON questions(created_at);
 CREATE INDEX idx_questions_is_read ON questions(is_read);
+CREATE INDEX idx_questions_user_question_number ON questions(to_user_id, user_question_number);
+CREATE UNIQUE INDEX idx_questions_user_number_unique ON questions(to_user_id, user_question_number) WHERE status != 'deleted';
 
 CREATE INDEX idx_user_blocks_blocker_id ON user_blocks(blocker_id);
 CREATE INDEX idx_user_blocks_blocked_id ON user_blocks(blocked_id);
@@ -106,3 +109,39 @@ FOR EACH ROW
 BEGIN
     INSERT OR IGNORE INTO user_settings (user_id) VALUES (NEW.telegram_id);
 END;
+
+-- Триггер для автоматического вычисления user_question_number при вставке
+CREATE TRIGGER calculate_user_question_number
+AFTER INSERT ON questions
+FOR EACH ROW
+WHEN NEW.user_question_number IS NULL
+BEGIN
+    UPDATE questions 
+    SET user_question_number = (
+        SELECT COALESCE(MAX(user_question_number), 0) + 1 
+        FROM questions q2 
+        WHERE q2.to_user_id = NEW.to_user_id
+        AND q2.status != 'deleted'
+    )
+    WHERE id = NEW.id;
+END;
+
+-- Триггер для пересчета номеров при удалении вопроса
+CREATE TRIGGER recalculate_user_question_numbers_on_delete
+AFTER UPDATE ON questions
+FOR EACH ROW
+WHEN NEW.status = 'deleted' AND OLD.status != 'deleted'
+BEGIN
+    -- Устанавливаем user_question_number в NULL для удаленного вопроса
+    UPDATE questions 
+    SET user_question_number = NULL
+    WHERE id = NEW.id;
+    
+    -- Пересчитываем номера для всех вопросов пользователя после удаленного
+    UPDATE questions 
+    SET user_question_number = user_question_number - 1
+    WHERE to_user_id = NEW.to_user_id 
+    AND user_question_number > OLD.user_question_number
+    AND status != 'deleted'
+    AND id != NEW.id;
+END;