Implement 'show <id|name>'

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

Author: skygragon

lib/commands/list.js

@@ -1,4 +1,6 @@
-var sprintf = require('underscore.string/sprintf');
+var sprintf = require('sprintf-js').sprintf;
+
+var problems = require('../problems');
 
 var cmd = {
   command: 'list [--cached|-c] [--undone|-D]',
@@ -16,7 +18,6 @@ var cmd = {
 };
 
 cmd.handler = function(argv) {
-  var problems = require('../problems');
   problems.getAll(function(err, items){
     items.forEach(function(item){
       console.log(sprintf('[%3d] %-60s %-6s (%s)',

lib/commands/show.js

@@ -1,3 +1,7 @@
+var sprintf = require('sprintf-js').sprintf;
+
+var problems = require('../problems');
+
 var cmd = {
   command: 'show <problem>',
   desc: 'Show problem details.',
@@ -9,8 +13,16 @@ var cmd = {
 };
 
 cmd.handler = function(argv) {
-  // TODO
-  console.log(argv);
+  var k = argv.problem;
+  problems.searchOne(k, function(err, item){
+    console.log(sprintf('[%d] %s\n', item.id, item.name));
+    console.log(sprintf('%s\n', item.link));
+    console.log(sprintf('* %s (%s)', item.level, item.percent));
+    console.log(sprintf('* Total Accepted: %d', item.total_ac));
+    console.log(sprintf('* Total Submissions: %d', item.total_submit));
+    console.log();
+    console.log(item.desc);
+  });
 }
 
 module.exports = cmd;

lib/config.js

@@ -1,4 +1,4 @@
 module.exports = {
-  BASE_URL: 'https://leetcode.com/',
+  BASE_URL: 'https://leetcode.com',
   PROBLEMS_URL: 'https://leetcode.com/problems/'
 };

lib/problems.js

@@ -1,36 +1,70 @@
 var cheerio = require('cheerio'),
-    request = require('request');
+    request = require('request'),
+    _ = require('underscore');
 
 var cache = require('./cache'),
     config = require('./config');
 
 var problems = {};
 
 problems.getAll = function(cb) {
-  var items = cache.get('all');
-  if (items) return cb(null, items);
+  var cached = cache.get('all');
+  if (cached) return cb(null, cached);
 
   // cache miss, retrieve it now
   request(config.PROBLEMS_URL, function(err, resp, body) {
     if (err) return cb(err);
     if (resp.statusCode != 200) return cb('Invalid HTTP response: ' + resp.statusCode);
 
     var $ = cheerio.load(body);
-    items = $('#problemList tbody tr').map(function(){
+    var items = $('#problemList tbody tr').map(function(){
       var tds = $(this).children();
-      return {
+      var item = {
         id:      $(tds[1]).text(),
         name:    $(tds[2]).children('a').text(),
-        link:    $(tds[2]).children('a').attr('href'),
+        link:    config.BASE_URL + $(tds[2]).children('a').attr('href'),
         percent: $(tds[3]).text(),
         level:   $(tds[6]).text()
       };
+      item.key = _.last(_.compact(item.link.split('/')))
+      return item;
     }).get();
 
     cache.set('all', items);
-
     return cb(null, items);
   });
 };
 
+problems.getOne = function(item, cb) {
+  var cached = cache.get(item.key);
+  if (cached) return cb(null, cached);
+
+  request(item.link, function(err, resp, body){
+    if (err) return cb(err);
+    if (resp.statusCode != 200) return cb('Invalid HTTP response: ' + resp.statusCode);
+
+    var $ = cheerio.load(body);
+    item.desc = $('meta[property="og:description"]').attr('content');
+    var info = $('div[class="question-info text-info"] ul li strong');
+    item.total_ac = $(info[0]).text();
+    item.total_submit = $(info[1]).text();
+
+    cache.set(item.key, item);
+    return cb(null, item);
+  });
+};
+
+problems.searchOne = function(key, cb) {
+  var self = this;
+
+  this.getAll(function(err, items){
+    if (err) return cb(err);
+
+    var item = _.find(items, function(x){
+      return x.id == key || x.name == key || x.key == key;
+    });
+    return self.getOne(item, cb);
+  });
+};
+
 module.exports = problems;

package.json

@@ -31,7 +31,8 @@
   "dependencies": {
     "cheerio": "^0.20.0",
     "request": "^2.74.0",
-    "underscore.string": "^3.3.4",
+    "sprintf-js": "^1.0.3",
+    "underscore": "^1.8.3",
     "yargs": "^5.0.0"
   }
 }