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{ sqlite } from \"https://esm.town/v/stevekrouse/sqlite\";\nimport type { Student, Unit, Examination, FeePayment, FeeStructure, Event, News, Club, Project, Document } from \"../../shared/types.ts\";\n\n// Student queries\nexport async function getStudentById(id: number): Promise {\n const result = await sqlite.execute(\"SELECT * FROM students WHERE id = ?\", [id]);\n if (result.length === 0) return null;\n \n const row = result[0];\n return {\n id: row.id,\n name: row.name,\n admission: row.admission,\n email: row.email,\n phone: row.phone,\n address: row.address,\n year: row.year,\n department: row.department,\n club: row.club,\n profilePicture: row.profile_picture,\n createdAt: row.created_at,\n updatedAt: row.updated_at\n };\n}\n\nexport async function getStudentByAdmission(admission: string): Promise {\n const result = await sqlite.execute(\"SELECT * FROM students WHERE admission = ?\", [admission]);\n if (result.length === 0) return null;\n \n const row = result[0];\n return {\n id: row.id,\n name: row.name,\n admission: row.admission,\n email: row.email,\n phone: row.phone,\n address: row.address,\n year: row.year,\n department: row.department,\n club: row.club,\n profilePicture: row.profile_picture,\n createdAt: row.created_at,\n updatedAt: row.updated_at\n };\n}\n\nexport async function updateStudent(id: number, updates: Partial): Promise {\n const fields = [];\n const values = [];\n \n for (const [key, value] of Object.entries(updates)) {\n if (key === 'id' || key === 'createdAt') continue;\n \n const dbKey = key === 'profilePicture' ? 'profile_picture' : \n key === 'updatedAt' ? 'updated_at' : key;\n fields.push(`${dbKey} = ?`);\n values.push(value);\n }\n \n if (fields.length === 0) return false;\n \n fields.push('updated_at = CURRENT_TIMESTAMP');\n values.push(id);\n \n const query = `UPDATE students SET ${fields.join(', ')} WHERE id = ?`;\n await sqlite.execute(query, values);\n return true;\n}\n\n// Academic queries\nexport async function getStudentUnits(studentId: number): Promise {\n const result = await sqlite.execute(\"SELECT * FROM units WHERE student_id = ?\", [studentId]);\n return result.map(row => ({\n id: row.id,\n studentId: row.student_id,\n unitCode: row.unit_code,\n unitName: row.unit_name,\n credits: row.credits,\n semester: row.semester,\n year: row.year,\n status: row.status as 'registered' | 'completed' | 'failed'\n }));\n}\n\nexport async function getStudentExaminations(studentId: number): Promise {\n const result = await sqlite.execute(\"SELECT * FROM examinations WHERE student_id = ? ORDER BY exam_date DESC\", [studentId]);\n return result.map(row => ({\n id: row.id,\n studentId: row.student_id,\n unitCode: row.unit_code,\n examType: row.exam_type as 'CAT' | 'EXAM' | 'ASSIGNMENT',\n score: row.score,\n maxScore: row.max_score,\n examDate: row.exam_date,\n semester: row.semester,\n year: row.year\n }));\n}\n\nexport async function getAcademicProgress(studentId: number) {\n const units = await getStudentUnits(studentId);\n const exams = await getStudentExaminations(studentId);\n \n const totalCredits = units.reduce((sum, unit) => sum + unit.credits, 0);\n const completedCredits = units.filter(unit => unit.status === 'completed').reduce((sum, unit) => sum + unit.credits, 0);\n \n const averageScore = exams.length > 0 ? \n exams.reduce((sum, exam) => sum + (exam.score / exam.maxScore * 100), 0) / exams.length : 0;\n \n return {\n totalCredits,\n completedCredits,\n progressPercentage: totalCredits > 0 ? (completedCredits / totalCredits * 100) : 0,\n averageScore: Math.round(averageScore * 100) / 100,\n totalExams: exams.length,\n units: units.length\n };\n}\n\n// Financial queries\nexport async function getStudentFeePayments(studentId: number): Promise {\n const result = await sqlite.execute(\"SELECT * FROM fee_payments WHERE student_id = ? ORDER BY payment_date DESC\", [studentId]);\n return result.map(row => ({\n id: row.id,\n studentId: row.student_id,\n amount: row.amount,\n paymentDate: row.payment_date,\n semester: row.semester,\n year: row.year,\n paymentMethod: row.payment_method,\n receiptNumber: row.receipt_number\n }));\n}\n\nexport async function getFeeStructure(department: string, year: string): Promise {\n const result = await sqlite.execute(\"SELECT * FROM fee_structure WHERE department = ? AND year = ?\", [department, year]);\n if (result.length === 0) return null;\n \n const row = result[0];\n return {\n id: row.id,\n department: row.department,\n year: row.year,\n tuitionFee: row.tuition_fee,\n examFee: row.exam_fee,\n libraryFee: row.library_fee,\n totalFee: row.total_fee\n };\n}\n\nexport async function getFeeBalance(studentId: number, year: string): Promise {\n const student = await getStudentById(studentId);\n if (!student) return 0;\n \n const feeStructure = await getFeeStructure(student.department, year);\n if (!feeStructure) return 0;\n \n const payments = await sqlite.execute(\n \"SELECT SUM(amount) as total_paid FROM fee_payments WHERE student_id = ? AND year = ?\", \n [studentId, year]\n );\n \n const totalPaid = payments[0]?.total_paid || 0;\n return feeStructure.totalFee - totalPaid;\n}\n\n// Social queries\nexport async function getEvents(limit: number = 10): Promise {\n const result = await sqlite.execute(\"SELECT * FROM events ORDER BY event_date ASC LIMIT ?\", [limit]);\n return result.map(row => ({\n id: row.id,\n title: row.title,\n description: row.description,\n eventDate: row.event_date,\n location: row.location,\n category: row.category as 'academic' | 'social' | 'sports' | 'club',\n organizer: row.organizer\n }));\n}\n\nexport async function getNews(limit: number = 10): Promise {\n const result = await sqlite.execute(\"SELECT * FROM news ORDER BY publish_date DESC LIMIT ?\", [limit]);\n return result.map(row => ({\n id: row.id,\n title: row.title,\n content: row.content,\n publishDate: row.publish_date,\n category: row.category as 'announcement' | 'memo' | 'general',\n priority: row.priority as 'low' | 'medium' | 'high'\n }));\n}\n\nexport async function getClubs(): Promise {\n const result = await sqlite.execute(\"SELECT * FROM clubs ORDER BY name\");\n return result.map(row => ({\n id: row.id,\n name: row.name,\n description: row.description,\n department: row.department,\n memberCount: row.member_count,\n meetingSchedule: row.meeting_schedule,\n contactEmail: row.contact_email\n }));\n}\n\nexport async function getProjects(department?: string): Promise {\n let query = \"SELECT * FROM projects\";\n let params: any[] = [];\n \n if (department) {\n query += \" WHERE department = ?\";\n params.push(department);\n }\n \n query += \" ORDER BY created_at DESC\";\n \n const result = await sqlite.execute(query, params);\n return result.map(row => ({\n id: row.id,\n title: row.title,\n description: row.description,\n department: row.department,\n supervisor: row.supervisor,\n status: row.status as 'open' | 'ongoing' | 'completed',\n requiredSkills: JSON.parse(row.required_skills || '[]'),\n maxMembers: row.max_members,\n currentMembers: row.current_members\n }));\n}\n\n// Document queries\nexport async function getStudentDocuments(studentId: number, type?: string): Promise {\n let query = \"SELECT * FROM documents WHERE student_id = ?\";\n let params: any[] = [studentId];\n \n if (type) {\n query += \" AND type = ?\";\n params.push(type);\n }\n \n query += \" ORDER BY upload_date DESC\";\n \n const result = await sqlite.execute(query, params);\n return result.map(row => ({\n id: row.id,\n studentId: row.student_id,\n type: row.type as 'logbook' | 'insurance' | 'mentor-letter' | 'transcript' | 'certificate',\n title: row.title,\n description: row.description,\n filePath: row.file_path,\n uploadDate: row.upload_date,\n expiryDate: row.expiry_date\n }));\n}","deleted","label",[167,168,149],"backend","database","permalink","https://www.val.town/x/desniland/dbssetprofile/code/backend/database/queries.ts","extension","actionData","errors"]