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{ sqlite } from \"https://esm.town/v/stevekrouse/sqlite\";\nimport type { Student, User, Message, CreateStudentRequest, CreateMessageRequest } from \"../../shared/types.ts\";\n\n// User queries\nexport async function getUserByUsername(username: string): Promise {\n const result = await sqlite.execute(\n \"SELECT id, username, email, role, first_name, last_name, created_at FROM users WHERE username = ?\",\n [username]\n );\n \n if (result.length === 0) return null;\n \n const row = result[0];\n return {\n id: row.id,\n username: row.username,\n email: row.email,\n role: row.role,\n firstName: row.first_name,\n lastName: row.last_name,\n createdAt: row.created_at\n };\n}\n\nexport async function getUserById(id: number): Promise {\n const result = await sqlite.execute(\n \"SELECT id, username, email, role, first_name, last_name, created_at FROM users WHERE id = ?\",\n [id]\n );\n \n if (result.length === 0) return null;\n \n const row = result[0];\n return {\n id: row.id,\n username: row.username,\n email: row.email,\n role: row.role,\n firstName: row.first_name,\n lastName: row.last_name,\n createdAt: row.created_at\n };\n}\n\nexport async function validateUserPassword(username: string, password: string): Promise {\n const result = await sqlite.execute(\n \"SELECT id, username, email, role, first_name, last_name, created_at FROM users WHERE username = ? AND password_hash = ?\",\n [username, password]\n );\n \n if (result.length === 0) return null;\n \n const row = result[0];\n return {\n id: row.id,\n username: row.username,\n email: row.email,\n role: row.role,\n firstName: row.first_name,\n lastName: row.last_name,\n createdAt: row.created_at\n };\n}\n\n// Student queries\nexport async function getAllStudents(): Promise {\n const result = await sqlite.execute(\n `SELECT id, first_name, last_name, date_of_birth, grade, parent_name, parent_email, \n parent_phone, address, emergency_contact, emergency_phone, medical_info, \n enrollment_date, is_active, created_at, updated_at \n FROM students ORDER BY last_name, first_name`\n );\n \n return result.map(row => ({\n id: row.id,\n firstName: row.first_name,\n lastName: row.last_name,\n dateOfBirth: row.date_of_birth,\n grade: row.grade,\n parentName: row.parent_name,\n parentEmail: row.parent_email,\n parentPhone: row.parent_phone,\n address: row.address,\n emergencyContact: row.emergency_contact,\n emergencyPhone: row.emergency_phone,\n medicalInfo: row.medical_info,\n enrollmentDate: row.enrollment_date,\n isActive: Boolean(row.is_active),\n createdAt: row.created_at,\n updatedAt: row.updated_at\n }));\n}\n\nexport async function getStudentById(id: number): Promise {\n const result = await sqlite.execute(\n `SELECT id, first_name, last_name, date_of_birth, grade, parent_name, parent_email, \n parent_phone, address, emergency_contact, emergency_phone, medical_info, \n enrollment_date, is_active, created_at, updated_at \n FROM students WHERE id = ?`,\n [id]\n );\n \n if (result.length === 0) return null;\n \n const row = result[0];\n return {\n id: row.id,\n firstName: row.first_name,\n lastName: row.last_name,\n dateOfBirth: row.date_of_birth,\n grade: row.grade,\n parentName: row.parent_name,\n parentEmail: row.parent_email,\n parentPhone: row.parent_phone,\n address: row.address,\n emergencyContact: row.emergency_contact,\n emergencyPhone: row.emergency_phone,\n medicalInfo: row.medical_info,\n enrollmentDate: row.enrollment_date,\n isActive: Boolean(row.is_active),\n createdAt: row.created_at,\n updatedAt: row.updated_at\n };\n}\n\nexport async function createStudent(studentData: CreateStudentRequest): Promise {\n const result = await sqlite.execute(\n `INSERT INTO students (first_name, last_name, date_of_birth, grade, parent_name, \n parent_email, parent_phone, address, emergency_contact, emergency_phone, medical_info)\n VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`,\n [\n studentData.firstName,\n studentData.lastName,\n studentData.dateOfBirth,\n studentData.grade,\n studentData.parentName,\n studentData.parentEmail,\n studentData.parentPhone,\n studentData.address,\n studentData.emergencyContact,\n studentData.emergencyPhone,\n studentData.medicalInfo || null\n ]\n );\n \n return result.lastInsertRowid as number;\n}\n\nexport async function updateStudent(id: number, studentData: Partial): Promise {\n const fields = [];\n const values = [];\n \n Object.entries(studentData).forEach(([key, value]) => {\n if (value !== undefined) {\n // Convert camelCase to snake_case\n const dbField = key.replace(/([A-Z])/g, '_$1').toLowerCase();\n fields.push(`${dbField} = ?`);\n values.push(value);\n }\n });\n \n if (fields.length === 0) return false;\n \n fields.push('updated_at = CURRENT_TIMESTAMP');\n values.push(id);\n \n const result = await sqlite.execute(\n `UPDATE students SET ${fields.join(', ')} WHERE id = ?`,\n values\n );\n \n return result.changes > 0;\n}\n\nexport async function deleteStudent(id: number): Promise {\n const result = await sqlite.execute(\n \"UPDATE students SET is_active = 0, updated_at = CURRENT_TIMESTAMP WHERE id = ?\",\n [id]\n );\n \n return result.changes > 0;\n}\n\n// Message queries\nexport async function getMessagesForUser(userId: number): Promise {\n const result = await sqlite.execute(\n `SELECT m.id, m.from_user_id, m.to_user_id, m.subject, m.content, m.is_read, \n m.is_announcement, m.student_id, m.created_at,\n fu.first_name as from_first_name, fu.last_name as from_last_name,\n tu.first_name as to_first_name, tu.last_name as to_last_name,\n s.first_name as student_first_name, s.last_name as student_last_name\n FROM messages m\n LEFT JOIN users fu ON m.from_user_id = fu.id\n LEFT JOIN users tu ON m.to_user_id = tu.id\n LEFT JOIN students s ON m.student_id = s.id\n WHERE m.to_user_id = ? OR m.from_user_id = ? OR m.is_announcement = 1\n ORDER BY m.created_at DESC`,\n [userId, userId]\n );\n \n return result.map(row => ({\n id: row.id,\n fromUserId: row.from_user_id,\n toUserId: row.to_user_id,\n subject: row.subject,\n content: row.content,\n isRead: Boolean(row.is_read),\n isAnnouncement: Boolean(row.is_announcement),\n studentId: row.student_id,\n createdAt: row.created_at,\n fromUser: row.from_first_name ? {\n firstName: row.from_first_name,\n lastName: row.from_last_name\n } : undefined,\n toUser: row.to_first_name ? {\n firstName: row.to_first_name,\n lastName: row.to_last_name\n } : undefined,\n student: row.student_first_name ? {\n firstName: row.student_first_name,\n lastName: row.student_last_name\n } : undefined\n }));\n}\n\nexport async function createMessage(fromUserId: number, messageData: CreateMessageRequest): Promise {\n const result = await sqlite.execute(\n `INSERT INTO messages (from_user_id, to_user_id, subject, content, is_announcement, student_id)\n VALUES (?, ?, ?, ?, ?, ?)`,\n [\n fromUserId,\n messageData.toUserId || null,\n messageData.subject,\n messageData.content,\n messageData.isAnnouncement ? 1 : 0,\n messageData.studentId || null\n ]\n );\n \n return result.lastInsertRowid as number;\n}\n\nexport async function markMessageAsRead(messageId: number, userId: number): Promise {\n const result = await sqlite.execute(\n \"UPDATE messages SET is_read = 1 WHERE id = ? AND to_user_id = ?\",\n [messageId, userId]\n );\n \n return result.changes > 0;\n}\n\n// Dashboard queries\nexport async function getDashboardStats(userId: number): Promise {\n const totalStudents = await sqlite.execute(\"SELECT COUNT(*) as count FROM students WHERE is_active = 1\");\n const unreadMessages = await sqlite.execute(\n \"SELECT COUNT(*) as count FROM messages WHERE to_user_id = ? AND is_read = 0\",\n [userId]\n );\n \n return {\n totalStudents: totalStudents[0].count,\n activeStudents: totalStudents[0].count,\n unreadMessages: unreadMessages[0].count\n };\n}","deleted","label",[170,171,153],"backend","database","permalink","https://www.val.town/x/Maruel/SchoolBank/code/backend/database/queries.ts","extension","actionData","errors"]