77 lines
3.3 KiB
TypeScript
77 lines
3.3 KiB
TypeScript
import { RestError, type Dialect, type SqlRenderer } from '@crudy/restloom';
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import mssqlDriver, { type ConnectionPool } from 'mssql';
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import { introspect } from './introspect.js';
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import { MssqlRenderer } from './renderer.js';
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export { MssqlRenderer } from './renderer.js';
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const CODES: Record<number, [number, string]> = {
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2627: [409, 'duplicate'],
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2601: [409, 'duplicate'],
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515: [400, 'value_required'],
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245: [400, 'invalid_value'],
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241: [400, 'invalid_value'],
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242: [400, 'invalid_value'],
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8114: [400, 'invalid_value'],
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8115: [400, 'invalid_value'],
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2628: [400, 'invalid_value'],
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229: [403, 'forbidden'],
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230: [403, 'forbidden'],
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};
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/** Error 547 covers both foreign keys and checks; its message tells which. */
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export function mapError(err: unknown): RestError | null {
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const e = err as { number?: unknown; code?: unknown; message?: unknown; originalError?: { info?: { number?: unknown; message?: unknown } } };
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if (e?.code === 'ETIMEOUT') return new RestError(503, 'timeout');
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const number = e?.number ?? e?.originalError?.info?.number;
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if (number === 547) {
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const text = String(e.message ?? e.originalError?.info?.message ?? '');
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return /CHECK constraint/i.test(text) ? new RestError(400, 'value_rejected') : new RestError(409, 'reference_missing');
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}
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const hit = typeof number === 'number' ? CODES[number] : undefined;
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return hit ? new RestError(hit[0], hit[1]) : null;
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}
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export interface MssqlOptions {
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renderer?: SqlRenderer;
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}
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/**
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* The SQL Server 2022 dialect over an mssql ConnectionPool. Each request is one
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* transaction; the statement timeout is the pool's `requestTimeout`, since the
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* driver sets it per pool. Row security is SQL Server's security policies,
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* which a `transaction` hook feeds through sp_set_session_context.
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*/
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export function mssql(pool: ConnectionPool, options: MssqlOptions = {}): Dialect {
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return {
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name: 'mssql',
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capabilities: { returning: true, estimatedCount: false, rowSecurity: true, procedures: true },
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renderer: options.renderer ?? new MssqlRenderer(),
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decode: (value) => (typeof value === 'string' ? JSON.parse(value) : value),
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introspect: (scope) => introspect(pool, scope),
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async transaction(fn) {
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const tx = new mssqlDriver.Transaction(pool);
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await tx.begin();
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try {
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const out = await fn({
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async query(sql, params) {
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const req = new mssqlDriver.Request(tx);
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params.forEach((v, i) => {
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// Whole numbers beyond 32 bits go as BigInt, or the driver overflows them as Int.
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if (typeof v === 'number' && Number.isInteger(v) && Math.abs(v) > 2147483647) req.input(`p${i + 1}`, mssqlDriver.BigInt, v);
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else req.input(`p${i + 1}`, v);
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});
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return ((await req.query(sql)).recordset ?? []) as Record<string, unknown>[];
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},
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});
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await tx.commit();
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return out;
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} catch (err) {
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await tx.rollback().catch(() => undefined);
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throw err;
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}
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},
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mapError,
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};
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}
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