1 files changed, 36 insertions, 0 deletions
diff --git a/src/background/usecases/parsers.ts b/src/background/usecases/parsers.ts
new file mode 100644
index 0000000..6135fd8
--- /dev/null
+++ b/src/background/usecases/parsers.ts
@@ -0,0 +1,36 @@
+import * as PropertyDefs from '../../shared//property-defs';
+
+const mustNumber = (v: any): number => {
+  let num = Number(v);
+  if (isNaN(num)) {
+    throw new Error('Not number: ' + v);
+  }
+  return num;
+};
+
+const parseSetOption = (
+  args: string,
+): any[] => {
+  let [key, value]: any[] = args.split('=');
+  if (value === undefined) {
+    value = !key.startsWith('no');
+    key = value ? key : key.slice(2);
+  }
+  let def = PropertyDefs.defs.find(d => d.name === key);
+  if (!def) {
+    throw new Error('Unknown property: ' + key);
+  }
+  if (def.type === 'boolean' && typeof value !== 'boolean' ||
+       def.type !== 'boolean' && typeof value === 'boolean') {
+    throw new Error('Invalid argument: ' + args);
+  }
+
+  switch (def.type) {
+  case 'string': return [key, value];
+  case 'number': return [key, mustNumber(value)];
+  case 'boolean': return [key, value];
+  }
+  throw new Error('Unknown property type: ' + def.type);
+};
+
+export { parseSetOption };