filter parse - ts

packages/filterparser/src/parseFilter.ts

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+import P from 'parsimmon';
+import { FilterType } from './types';
+
+const whitespace = P.regexp(/\s*/m);
+
+function token(parser) {
+  return parser.skip(whitespace);
+}
+
+function interpretEscapes(str) {
+  let escapes = {
+    b: '\b',
+    f: '\f',
+    n: '\n',
+    r: '\r',
+    t: '\t',
+  };
+  return str.replace(/\\(u[0-9a-fA-F]{4}|[^u])/, (_, escape) => {
+    let type = escape.charAt(0);
+    let hex = escape.slice(1);
+    if (type === 'u') {
+      return String.fromCharCode(parseInt(hex, 16));
+    }
+    if (escapes.hasOwnProperty(type)) {
+      return escapes[type];
+    }
+    return type;
+  });
+}
+
+const parser = P.createLanguage({
+  expr: r => P.alt(r.string),
+
+  string: () =>
+    token(P.regexp(/"((?:\\.|.)*?)"/, 1))
+      .map(interpretEscapes)
+      .desc('string'),
+});
+
+export function parseFilter(value: string, filterType: FilterType) {
+  const ast = parser.expr.tryParse(value);
+  console.log(ast);
+  return ast;
+}

packages/filterparser/src/parserFilter.test.ts

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+import parserFilter, { parseFilter } from './parseFilter';
+
+test('parse string', parseFilter('"123"', 'string'));

packages/filterparser/src/types.ts

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+// import types from '@dbgate/types';
+
+export type FilterType = 'number' | 'string' | 'datetime' | 'logical';