1 files changed, 59 insertions, 0 deletions
diff --git a/src/shared/commands/parsers.js b/src/shared/commands/parsers.js
new file mode 100644
index 0000000..fb37d2a
--- /dev/null
+++ b/src/shared/commands/parsers.js
@@ -0,0 +1,59 @@
+const normalizeUrl = (args, searchConfig) => {
+  let concat = args.join(' ');
+  try {
+    return new URL(concat).href;
+  } catch (e) {
+    if (concat.includes('.') && !concat.includes(' ')) {
+      return 'http://' + concat;
+    }
+    let query = concat;
+    let template = searchConfig.engines[
+      searchConfig.default
+    ];
+    for (let key in searchConfig.engines) {
+      if (args[0] === key) {
+        query = args.slice(1).join(' ');
+        template = searchConfig.engines[key];
+      }
+    }
+    return template.replace('{}', encodeURIComponent(query));
+  }
+};
+
+const mustNumber = (v) => {
+  let num = Number(v);
+  if (isNaN(num)) {
+    throw new Error('Not number: ' + v);
+  }
+  return num;
+};
+
+const parseSetOption = (word, types) => {
+  let [key, value] = word.split('=');
+  if (value === undefined) {
+    value = !key.startsWith('no');
+    key = value ? key : key.slice(2);
+  }
+  let type = types[key];
+  if (!type) {
+    throw new Error('Unknown property: ' + key);
+  }
+  if (type === 'boolean' && typeof value !== 'boolean' ||
+       type !== 'boolean' && typeof value === 'boolean') {
+    throw new Error('Invalid argument: ' + word);
+  }
+
+  switch (type) {
+  case 'string': return [key, value];
+  case 'number': return [key, mustNumber(value)];
+  case 'boolean': return [key, value];
+  }
+};
+
+const parseCommandLine = (line) => {
+  let words = line.trim().split(/ +/);
+  let name = words.shift();
+  return [name, words];
+};
+
+export { normalizeUrl, parseCommandLine, parseSetOption };