3 files changed, 146 insertions, 0 deletions
diff --git a/src/shared/commands/complete.js b/src/shared/commands/complete.js
new file mode 100644
index 0000000..0bdbab8
--- /dev/null
+++ b/src/shared/commands/complete.js
@@ -0,0 +1,84 @@
+import * as tabs from 'background/tabs';
+import * as histories from 'background/histories';
+
+const getOpenCompletions = (command, keywords, searchConfig) => {
+  return histories.getCompletions(keywords).then((pages) => {
+    let historyItems = pages.map((page) => {
+      return {
+        caption: page.title,
+        content: command + ' ' + page.url,
+        url: page.url
+      };
+    });
+    let engineNames = Object.keys(searchConfig.engines);
+    let engineItems = engineNames.filter(name => name.startsWith(keywords))
+      .map(name => ({
+        caption: name,
+        content: command + ' ' + name
+      }));
+
+    let completions = [];
+    if (engineItems.length > 0) {
+      completions.push({
+        name: 'Search Engines',
+        items: engineItems
+      });
+    }
+    if (historyItems.length > 0) {
+      completions.push({
+        name: 'History',
+        items: historyItems
+      });
+    }
+    return completions;
+  });
+};
+
+const getCompletions = (line, settings) => {
+  let typedWords = line.trim().split(/ +/);
+  let typing = '';
+  if (!line.endsWith(' ')) {
+    typing = typedWords.pop();
+  }
+
+  if (typedWords.length === 0) {
+    return Promise.resolve([]);
+  }
+  let name = typedWords.shift();
+  let keywords = typedWords.concat(typing).join(' ');
+
+  switch (name) {
+  case 'o':
+  case 'open':
+  case 't':
+  case 'tabopen':
+  case 'w':
+  case 'winopen':
+    return getOpenCompletions(name, keywords, settings.search);
+  case 'b':
+  case 'buffer':
+    return tabs.getCompletions(keywords).then((gotTabs) => {
+      let items = gotTabs.map((tab) => {
+        return {
+          caption: tab.title,
+          content: name + ' ' + tab.title,
+          url: tab.url,
+          icon: tab.favIconUrl
+        };
+      });
+      return [
+        {
+          name: 'Buffers',
+          items: items
+        }
+      ];
+    });
+  }
+  return Promise.resolve([]);
+};
+
+const complete = (line, settings) => {
+  return getCompletions(line, settings);
+};
+
+export default complete;
diff --git a/src/shared/commands/index.js b/src/shared/commands/index.js
new file mode 100644
index 0000000..78cb4df
--- /dev/null
+++ b/src/shared/commands/index.js
@@ -0,0 +1,3 @@
+import complete from './complete';
+
+export { complete };
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 };