support :buffer swiching by keyword

src/background/index.js

@@ -60,12 +60,11 @@ const normalizeUrl = (string) => {
 
 const cmdBuffer = (arg) => {
   if (isNaN(arg)) {
-    // TODO support buffer identification by non-number value
-    throw new TypeError(`${arg} is not a number`);
-  }
-
+    tabs.selectByKeyword(arg);
+  } else {
     let index = parseInt(arg, 10) - 1;
     tabs.selectAt(index);
+  }
 }
 
 const cmdEnterHandle = (request, sender) => {

src/background/tabs.js

@@ -24,11 +24,29 @@ const selectAt = (index) => {
       return;
     }
     if (index < 0 || tabs.length <= index) {
-      throw new RangeError(`buffer ${index} does not exist`)
+      throw new RangeError(`tab ${index} does not exist`)
     }
     let id = tabs[index].id;
     chrome.tabs.update(id, { active: true })
   });
+};
+
+const selectByKeyword = (keyword) => {
+  chrome.tabs.query({ currentWindow: true }, (tabs) => {
+    let tab = tabs.find((tab) => tab.url.includes(keyword))
+    if (tab) {
+      chrome.tabs.update(tab.id, { active: true });
+      return;
+    }
+
+    tab = tabs.find((tab) => tab.title.includes(keyword))
+    if (tab) {
+      chrome.tabs.update(tab.id, { active: true });
+      return;
+    }
+
+    throw new RangeError('No matching buffer for ' + keyword);
+  })
 }
 
 const selectPrevTab = (current, count) => {
@@ -60,4 +78,4 @@ const reload = (current, cache) => {
   );
 };
 
-export { closeTab, reopenTab, selectAt, selectNextTab, selectPrevTab, reload };
+export { closeTab, reopenTab, selectAt, selectByKeyword, selectNextTab, selectPrevTab, reload };