Tuning cache command.

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

Author: skygragon

docs/commands.md

@@ -55,8 +55,9 @@ Show help on sub command:
 
 Show cached problems.
 
-* `-d` to delete specific cached problem.
-* `-a` to delete all cached problems.
+* `leetcode cache <id>` to show specific problem cache.
+* `-d <id>` to delete specific problem cache.
+* `-d` to delete all cached problems.
 
 *Examples*
 
@@ -68,6 +69,10 @@ Show cache:
 	1.two-sum.algorithms                                  2.52K    2 hours ago
 	......
 
+Delete cache for problem 537:
+
+	$ leetcode cache -d 537
+
 # list
 
 Navigate the problems.
@@ -399,3 +404,4 @@ Verbose:
 	retry                default
 	cache                default
 	leetcode             default
+

lib/commands/cache.js

@@ -7,44 +7,43 @@ var cache = require('../cache');
 var session = require('../session');
 
 var cmd = {
-  command: 'cache',
+  command: 'cache [keyword]',
   desc:    'show cached problems',
   builder: {
-    all: {
-      alias:    'a',
-      type:     'boolean',
-      describe: 'Delete all cached problems',
-      default:  false
-    },
     delete: {
       alias:    'd',
-      type:     'string',
-      describe: 'Delete specific cached problem'
+      type:     'boolean',
+      describe: 'Delete cached problem',
+      default:  false
     }
   }
 };
 
 cmd.handler = function(argv) {
   session.argv = argv;
-  if (argv.delete === undefined) {
-    _.sortBy(cache.list(), function(f) {
+
+  var caches = cache.list()
+    .filter(function(f) {
+      return argv.keyword === undefined || f.name.startsWith(argv.keyword + '.');
+    });
+
+  if (argv.delete) {
+    caches.forEach(function(f) {
+      if (f.name === '.user') return;
+      cache.del(f.name);
+    });
+  } else {
+    _.sortBy(caches, function(f) {
       var x = parseInt(f.name.split('.')[0], 10);
       if (_.isNaN(x)) x = 0;
       return x;
     })
     .forEach(function(f) {
-      log.printf('%-50s %8s    %s ago',
+      log.printf('%-60s %8s    %s ago',
           chalk.green(f.name),
           h.prettySize(f.size),
           h.prettyTime((Date.now() - f.mtime) / 1000));
     });
-  } else if (argv.all) {
-    cache.list().forEach(function(f) {
-      if (f.name === '.user') return;
-      cache.del(f.name);
-    });
-  } else {
-    cache.del(argv.delete);
   }
 };