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{ sqlite } from \"https://esm.town/v/std/sqlite\";\nimport { TRANSACTIONS_TABLE } from \"./migrations.ts\";\nimport type { Transaction, DailySpending, MonthlySpending, CategorySpending } from \"../../shared/types.ts\";\n\nexport class TransactionQueries {\n // Get all transactions with optional filters\n static async getAll(filters?: {\n category?: string;\n type?: 'income' | 'expense';\n startDate?: string;\n endDate?: string;\n limit?: number;\n }): Promise {\n let query = `SELECT * FROM ${TRANSACTIONS_TABLE}`;\n const params: any[] = [];\n const conditions: string[] = [];\n\n if (filters?.category) {\n conditions.push('category = ?');\n params.push(filters.category);\n }\n\n if (filters?.type) {\n conditions.push('type = ?');\n params.push(filters.type);\n }\n\n if (filters?.startDate) {\n conditions.push('date >= ?');\n params.push(filters.startDate);\n }\n\n if (filters?.endDate) {\n conditions.push('date <= ?');\n params.push(filters.endDate);\n }\n\n if (conditions.length > 0) {\n query += ' WHERE ' + conditions.join(' AND ');\n }\n\n query += ' ORDER BY date DESC, created_at DESC';\n\n if (filters?.limit) {\n query += ' LIMIT ?';\n params.push(filters.limit);\n }\n\n const result = await sqlite.execute(query, params);\n return result.rows as Transaction[];\n }\n\n // Get transaction by ID\n static async getById(id: number): Promise {\n const result = await sqlite.execute(\n `SELECT * FROM ${TRANSACTIONS_TABLE} WHERE id = ?`,\n [id]\n );\n return result.rows[0] as Transaction || null;\n }\n\n // Create new transaction\n static async create(transaction: Omit): Promise {\n const result = await sqlite.execute(\n `INSERT INTO ${TRANSACTIONS_TABLE} (amount, description, category, date, type)\n VALUES (?, ?, ?, ?, ?)`,\n [transaction.amount, transaction.description, transaction.category, transaction.date, transaction.type]\n );\n\n const newTransaction = await this.getById(result.lastInsertRowId!);\n if (!newTransaction) {\n throw new Error('Failed to create transaction');\n }\n return newTransaction;\n }\n\n // Update transaction\n static async update(id: number, updates: Partial>): Promise {\n const fields: string[] = [];\n const params: any[] = [];\n\n Object.entries(updates).forEach(([key, value]) => {\n if (value !== undefined) {\n fields.push(`${key} = ?`);\n params.push(value);\n }\n });\n\n if (fields.length === 0) {\n throw new Error('No fields to update');\n }\n\n fields.push('updated_at = CURRENT_TIMESTAMP');\n params.push(id);\n\n await sqlite.execute(\n `UPDATE ${TRANSACTIONS_TABLE} SET ${fields.join(', ')} WHERE id = ?`,\n params\n );\n\n const updatedTransaction = await this.getById(id);\n if (!updatedTransaction) {\n throw new Error('Transaction not found');\n }\n return updatedTransaction;\n }\n\n // Delete transaction\n static async delete(id: number): Promise {\n const result = await sqlite.execute(\n `DELETE FROM ${TRANSACTIONS_TABLE} WHERE id = ?`,\n [id]\n );\n return result.changes > 0;\n }\n\n // Get daily spending summary\n static async getDailySpending(startDate?: string, endDate?: string): Promise {\n let query = `\n SELECT \n date,\n SUM(CASE WHEN type = 'income' THEN amount ELSE 0 END) as total_income,\n SUM(CASE WHEN type = 'expense' THEN amount ELSE 0 END) as total_expenses,\n SUM(CASE WHEN type = 'income' THEN amount ELSE -amount END) as net_amount,\n COUNT(*) as transaction_count\n FROM ${TRANSACTIONS_TABLE}\n `;\n \n const params: string[] = [];\n const conditions: string[] = [];\n\n if (startDate) {\n conditions.push('date >= ?');\n params.push(startDate);\n }\n\n if (endDate) {\n conditions.push('date <= ?');\n params.push(endDate);\n }\n\n if (conditions.length > 0) {\n query += ' WHERE ' + conditions.join(' AND ');\n }\n\n query += ' GROUP BY date ORDER BY date DESC';\n\n const result = await sqlite.execute(query, params);\n return result.rows as DailySpending[];\n }\n\n // Get monthly spending summary\n static async getMonthlySpending(): Promise {\n const query = `\n SELECT \n strftime('%Y-%m', date) as month,\n SUM(CASE WHEN type = 'income' THEN amount ELSE 0 END) as total_income,\n SUM(CASE WHEN type = 'expense' THEN amount ELSE 0 END) as total_expenses,\n SUM(CASE WHEN type = 'income' THEN amount ELSE -amount END) as net_amount,\n COUNT(*) as transaction_count\n FROM ${TRANSACTIONS_TABLE}\n GROUP BY strftime('%Y-%m', date)\n ORDER BY month DESC\n `;\n\n const result = await sqlite.execute(query);\n const monthlyData = result.rows as Omit[];\n\n // Get category breakdown for each month\n const monthlySpending: MonthlySpending[] = [];\n for (const month of monthlyData) {\n const categories = await this.getCategorySpendingForMonth(month.month);\n monthlySpending.push({\n ...month,\n categories\n });\n }\n\n return monthlySpending;\n }\n\n // Get category spending for a specific month\n static async getCategorySpendingForMonth(month: string): Promise {\n const query = `\n SELECT \n category,\n SUM(amount) as total_amount,\n COUNT(*) as transaction_count\n FROM ${TRANSACTIONS_TABLE}\n WHERE strftime('%Y-%m', date) = ? AND type = 'expense'\n GROUP BY category\n ORDER BY total_amount DESC\n `;\n\n const result = await sqlite.execute(query, [month]);\n const categories = result.rows as Omit[];\n\n // Calculate percentages\n const totalExpenses = categories.reduce((sum, cat) => sum + cat.total_amount, 0);\n \n return categories.map(cat => ({\n ...cat,\n percentage: totalExpenses > 0 ? (cat.total_amount / totalExpenses) * 100 : 0\n }));\n }\n\n // Get top spending categories overall\n static async getTopCategories(limit: number = 10): Promise {\n const query = `\n SELECT \n category,\n SUM(amount) as total_amount,\n COUNT(*) as transaction_count\n FROM ${TRANSACTIONS_TABLE}\n WHERE type = 'expense'\n GROUP BY category\n ORDER BY total_amount DESC\n LIMIT ?\n `;\n\n const result = await sqlite.execute(query, [limit]);\n const categories = result.rows as Omit[];\n\n // Calculate percentages\n const totalExpenses = categories.reduce((sum, cat) => sum + cat.total_amount, 0);\n \n return categories.map(cat => ({\n ...cat,\n percentage: totalExpenses > 0 ? (cat.total_amount / totalExpenses) * 100 : 0\n }));\n }\n}","deleted","label",[172,173,154],"backend","database","permalink","https://www.val.town/x/Dev_J/F_manager/code/backend/database/queries.ts","extension","actionData","errors"]