|
| 1 | +import { createResponse } from '../utils'; |
| 2 | +import { enqueueOperation, processNextOperation } from '../operation'; |
| 3 | + |
| 4 | +interface ColumnMapping { |
| 5 | + [key: string]: string; |
| 6 | +} |
| 7 | + |
| 8 | +interface CsvData { |
| 9 | + data: string; |
| 10 | + columnMapping?: Record<string, string>; |
| 11 | +} |
| 12 | + |
| 13 | +export async function importTableFromCsvRoute( |
| 14 | + sql: SqlStorage, |
| 15 | + operationQueue: any, |
| 16 | + ctx: any, |
| 17 | + processingOperation: { value: boolean }, |
| 18 | + tableName: string, |
| 19 | + request: Request |
| 20 | +): Promise<Response> { |
| 21 | + try { |
| 22 | + if (!request.body) { |
| 23 | + return createResponse(undefined, 'Request body is empty', 400); |
| 24 | + } |
| 25 | + |
| 26 | + let csvData: CsvData; |
| 27 | + const contentType = request.headers.get('Content-Type') || ''; |
| 28 | + |
| 29 | + if (contentType.includes('application/json')) { |
| 30 | + // Handle JSON-wrapped CSV data in POST body |
| 31 | + csvData = await request.json() as CsvData; |
| 32 | + } else if (contentType.includes('text/csv')) { |
| 33 | + // Handle raw CSV data in POST body |
| 34 | + const csvContent = await request.text(); |
| 35 | + csvData = { data: csvContent }; |
| 36 | + } else if (contentType.includes('multipart/form-data')) { |
| 37 | + // Handle file upload |
| 38 | + const formData = await request.formData(); |
| 39 | + const file = formData.get('file') as File | null; |
| 40 | + |
| 41 | + if (!file) { |
| 42 | + return createResponse(undefined, 'No file uploaded', 400); |
| 43 | + } |
| 44 | + |
| 45 | + const csvContent = await file.text(); |
| 46 | + csvData = { data: csvContent }; |
| 47 | + } else { |
| 48 | + return createResponse(undefined, 'Unsupported Content-Type', 400); |
| 49 | + } |
| 50 | + |
| 51 | + const { data: csvContent, columnMapping = {} } = csvData; |
| 52 | + |
| 53 | + // Parse CSV data |
| 54 | + const records = parseCSV(csvContent); |
| 55 | + |
| 56 | + if (records.length === 0) { |
| 57 | + return createResponse(undefined, 'Invalid CSV format or empty data', 400); |
| 58 | + } |
| 59 | + |
| 60 | + const failedStatements: { statement: string; error: string }[] = []; |
| 61 | + let successCount = 0; |
| 62 | + |
| 63 | + for (const record of records) { |
| 64 | + const mappedRecord = mapRecord(record, columnMapping); |
| 65 | + const columns = Object.keys(mappedRecord); |
| 66 | + const values = Object.values(mappedRecord); |
| 67 | + const placeholders = values.map(() => '?').join(', '); |
| 68 | + |
| 69 | + const statement = `INSERT INTO ${tableName} (${columns.join(', ')}) VALUES (${placeholders})`; |
| 70 | + |
| 71 | + try { |
| 72 | + await enqueueOperation( |
| 73 | + [{ sql: statement, params: values }], |
| 74 | + false, |
| 75 | + false, |
| 76 | + operationQueue, |
| 77 | + () => processNextOperation(sql, operationQueue, ctx, processingOperation) |
| 78 | + ); |
| 79 | + successCount++; |
| 80 | + } catch (error: any) { |
| 81 | + failedStatements.push({ |
| 82 | + statement: statement, |
| 83 | + error: error.message || 'Unknown error' |
| 84 | + }); |
| 85 | + } |
| 86 | + } |
| 87 | + |
| 88 | + const totalRecords = records.length; |
| 89 | + const failedCount = failedStatements.length; |
| 90 | + |
| 91 | + const resultMessage = `Imported ${successCount} out of ${totalRecords} records successfully. ${failedCount} records failed.`; |
| 92 | + |
| 93 | + return createResponse({ |
| 94 | + message: resultMessage, |
| 95 | + failedStatements: failedStatements |
| 96 | + }, undefined, 200); |
| 97 | + |
| 98 | + } catch (error: any) { |
| 99 | + console.error('CSV Import Error:', error); |
| 100 | + return createResponse(undefined, 'Failed to import CSV data: ' + error.message, 500); |
| 101 | + } |
| 102 | +} |
| 103 | + |
| 104 | +function parseCSV(csv: string): Record<string, string>[] { |
| 105 | + const lines = csv.split('\n'); |
| 106 | + const headers = lines[0].split(',').map(header => header.trim()); |
| 107 | + const records: Record<string, string>[] = []; |
| 108 | + |
| 109 | + for (let i = 1; i < lines.length; i++) { |
| 110 | + const values = lines[i].split(',').map(value => value.trim()); |
| 111 | + if (values.length === headers.length) { |
| 112 | + const record: Record<string, string> = {}; |
| 113 | + headers.forEach((header, index) => { |
| 114 | + record[header] = values[index]; |
| 115 | + }); |
| 116 | + records.push(record); |
| 117 | + } |
| 118 | + } |
| 119 | + |
| 120 | + return records; |
| 121 | +} |
| 122 | + |
| 123 | +function mapRecord(record: any, columnMapping: ColumnMapping): any { |
| 124 | + const mappedRecord: any = {}; |
| 125 | + for (const [key, value] of Object.entries(record)) { |
| 126 | + const mappedKey = columnMapping[key] || key; |
| 127 | + mappedRecord[mappedKey] = value; |
| 128 | + } |
| 129 | + return mappedRecord; |
| 130 | +} |
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