first try (#1)

Author: jminz

lib/commands/show.js

@@ -57,6 +57,18 @@ const cmd = {
         default:  false,
         describe: 'Show extra question details in source code'
       })
+      .option('getRangeEnd', {
+        alias:    'getRangeEnd',
+        type:     'string',
+        default:  false,
+        describe: 'End number of question range'
+      })
+      .option('getRangeStart', {
+        alias:    'getRangeStart',
+        type:     'string',
+        default:  false,
+        describe: 'Start number of question range'
+      })
       .positional('keyword', {
         type:     'string',
         default:  '',
@@ -169,32 +181,49 @@ function showProblem(problem, argv) {
 
 cmd.handler = function(argv) {
   session.argv = argv;
-  if (argv.keyword.length > 0) {
-    // show specific one
-    core.getProblem(argv.keyword, function(e, problem) {
-      if (e) return log.fail(e);
-      showProblem(problem, argv);
-    });
+  let end = (Number.parseInt(argv.getRangeEnd) >= 1) ? Number.parseInt(argv.getRangeEnd) : 1
+  let start = (Number.parseInt(argv.getRangeStart) >= 1) ? Number.parseInt(argv.getRangeStart) : 1
+  if (start > end) { start = end}
+  if (end) {
+    let i = start
+    while (i <= end) {
+      (function(i) {
+        setTimeout(function() {
+          core.getProblem(i, function(e, problem) {
+            if (e) { return log.fail(e); }
+            showProblem(problem, argv);
+          })
+        }, 50 * (i - start))
+      })(i++)
+    }
   } else {
-    // show random one
-    core.filterProblems(argv, function(e, problems) {
-      if (e) return log.fail(e);
-
-      // random select one that not AC-ed yet
-      const user = session.getUser();
-      problems = problems.filter(function(x) {
-        if (x.state === 'ac') return false;
-        if (!user.paid && x.locked) return false;
-        return true;
-      });
-      if (problems.length === 0) return log.fail('Problem not found!');
-
-      const problem = _.sample(problems);
-      core.getProblem(problem, function(e, problem) {
+    if (argv.keyword.length > 0) {
+      // show specific one
+      core.getProblem(argv.keyword, function(e, problem) {
         if (e) return log.fail(e);
         showProblem(problem, argv);
       });
-    });
+    } else {
+      // show random one
+      core.filterProblems(argv, function(e, problems) {
+        if (e) return log.fail(e);
+
+        // random select one that not AC-ed yet
+        const user = session.getUser();
+        problems = problems.filter(function(x) {
+          if (x.state === 'ac') return false;
+          if (!user.paid && x.locked) return false;
+          return true;
+        });
+        if (problems.length === 0) return log.fail('Problem not found!');
+
+        const problem = _.sample(problems);
+        core.getProblem(problem, function(e, problem) {
+          if (e) return log.fail(e);
+          showProblem(problem, argv);
+        });
+      });
+    }
   }
 };