Implement 'version'.

* refactor helper.js a bit.

Signed-off-by: Eric Wang <skygragon@gmail.com>

Author: skygragon

lib/cache.js

@@ -2,34 +2,24 @@ var fs = require('fs');
 
 var h = require('./helper');
 
-// try to save cache in user home.
-var BASE_DIR = h.getHomeDir() + '/.lc/';
-
-function getFullPath(k) {
-  if (!fs.existsSync(BASE_DIR))
-    fs.mkdirSync(BASE_DIR);
-
-  return BASE_DIR + k + '.json';
-}
-
 var cache = {};
 
 cache.get = function(k) {
-  var fullpath = getFullPath(k);
+  var fullpath = h.getCacheFile(k);
   if (!fs.existsSync(fullpath)) return null;
 
   var v = JSON.parse(fs.readFileSync(fullpath));
   return v;
 };
 
 cache.set = function(k, v) {
-  var fullpath = getFullPath(k);
+  var fullpath = h.getCacheFile(k);
   fs.writeFileSync(fullpath, JSON.stringify(v));
   return true;
 };
 
 cache.del = function(k) {
-  var fullpath = getFullPath(k);
+  var fullpath = h.getCacheFile(k);
   if (!fs.existsSync(fullpath)) return false;
 
   fs.unlinkSync(fullpath);

lib/cli.js

@@ -9,9 +9,18 @@ function setColorMode() {
   require('chalk').enabled = useColor;
 }
 
+function checkCache() {
+  var cacheDir = require('./helper').getCacheDir();
+
+  var fs = require('fs');
+  if (!fs.existsSync(cacheDir))
+    fs.mkdirSync(cacheDir);
+}
+
 var cli = {};
 
 cli.run = function() {
+  checkCache();
   setColorMode();
 
   require('yargs')

lib/commands/version.js

@@ -0,0 +1,34 @@
+var cmd = {
+  command: 'version',
+  desc:    'Show version info.',
+  builder: {
+    verbose: {
+      alias:    'v',
+      type:     'boolean',
+      describe: 'Show verbose info.'
+    }
+  }
+};
+
+cmd.handler = function(argv) {
+  var version = require('../../package.json').version;
+
+  if (!argv.verbose) {
+    return console.log(version);
+  }
+
+  console.log('leetcode-cli', version);
+
+  var h = require('../helper');
+  console.log();
+  console.log('Cache:', h.getCacheDir());
+  console.log('Config:', h.getConfigFile());
+
+  var config = require('../config');
+  console.log();
+  Object.getOwnPropertyNames(config).forEach(function(k) {
+    console.log(k, '=', config[k]);
+  });
+};
+
+module.exports = cmd;

lib/helper.js

@@ -62,7 +62,7 @@ h.extToLang = function(fullpath) {
   }
 };
 
-h.fileData = function(fullpath) {
+h.getFileData = function(fullpath) {
   return fs.readFileSync(fullpath).toString();
 };
 
@@ -74,6 +74,18 @@ h.getHomeDir = function() {
   return process.env.HOME || process.env.USERPROFILE;
 };
 
+h.getCacheDir = function() {
+  return this.getHomeDir() + '/.lc/';
+};
+
+h.getCacheFile = function(k) {
+  return this.getCacheDir() + k + '.json';
+};
+
+h.getConfigFile = function() {
+  return this.getHomeDir() + '/.lcconfig';
+};
+
 h.readStdin = function() {
   // FIXME: not work for win32
   return fs.readFileSync('/dev/stdin').toString();

lib/leetcode_client.js

@@ -147,7 +147,7 @@ leetcodeClient.testProblem = function(problem, cb) {
     'lang':        h.extToLang(problem.file),
     'question_id': parseInt(problem.id, 10),
     'test_mode':   false,
-    'typed_code':  h.fileData(problem.file)
+    'typed_code':  h.getFileData(problem.file)
   };
 
   request.post(opts, function(e, resp, body) {
@@ -177,7 +177,7 @@ leetcodeClient.submitProblem = function(problem, cb) {
     'lang':        h.extToLang(problem.file),
     'question_id': parseInt(problem.id, 10),
     'test_mode':   false,
-    'typed_code':  h.fileData(problem.file)
+    'typed_code':  h.getFileData(problem.file)
   };
 
   request.post(opts, function(e, resp, body) {