Add find-commenters option to the script

scripts/locales.js

@@ -1,15 +1,17 @@
 var fs = require('fs'),
-    path = require('path');
+    path = require('path'),
+    https = require('https');
 
 var localeDir = path.join('src', 'locale');
 
 var args = process.argv.slice(2);
 
 function help() {
-    console.log(process.argv[1], '[list]');
+    console.log(process.argv[1], '[list|mention|find-commenters] ARGS');
     console.log();
     console.log("    list      show all authors in all locales");
     console.log("    mention   show all authors in all locales, ready to copy-paste in github issue");
+    console.log("    find-commenters #ID  finds all people that participated in a github conversation");
 }
 
 function extract() {
@@ -56,6 +58,74 @@ function mention() {
     });
 }
 
+function findCommenters(postId) {
+
+    function fetchComments(page, callback) {
+        var options = {
+                hostname: 'api.github.com',
+                port: 443,
+                path: '/repos/moment/moment/issues/' + postId + '/comments?page=' + page,
+                method: 'GET',
+                headers: {
+                    'User-Agent': 'node script'
+                }
+            },
+            links = {};
+        console.log('fetching', options.path);
+        https.get(options, function (res) {
+            if ('link' in res.headers) {
+                res.headers.link.split(', ').forEach(function(linkStr) {
+                    var pieces = linkStr.split('; ');
+                    var key = pieces[1].split('=')[1];
+                    var link = pieces[0];
+                    key = key.substr(1, key.length - 2);
+                    link = link.substr(1, link.length - 2);
+                    links[key] = link;
+                });
+            }
+            var bodyChunks = [], body;
+            res.on('data', function (chunk) {
+                bodyChunks.push(chunk);
+            });
+            res.on('end', function () {
+                body = bodyChunks.join('');
+                callback(page, JSON.parse(body), links);
+            });
+        });
+    }
+
+    var commenters = {};
+    var maxPage = 1;
+    fetchComments(1, function (page, body, links) {
+        handleBody(body, page);
+        if ('last' in links) {
+            maxPage = parseInt(links.last.split('=')[1], 10);
+        }
+        var pagesLeft = maxPage - 1;
+        for (var p = 2; p <= maxPage; p += 1) {
+            fetchComments(p, function (page, body, links) {
+                handleBody(body, page);
+                pagesLeft -= 1;
+                if (pagesLeft === 0) {
+                    handleCommenters(Object.keys(commenters));
+                }
+            });
+        }
+    });
+
+    function handleBody(body, page) {
+        body.forEach(function (comment) {
+            console.log(page, comment.user.login);
+            commenters[comment.user.login] = 1;
+        });
+    }
+
+    function handleCommenters(commenters) {
+        console.log('len of commenters', commenters.length);
+        console.log(commenters);
+    }
+}
+
 if (args.length === 0) {
     help();
     process.exit(0);
@@ -68,6 +138,9 @@ switch (args[0]) {
     case 'mention':
         mention();
         break;
+    case 'find-commenters':
+        findCommenters(args[1]);
+        break;
     default:
         console.log("unknown argument", args[0]);
         break;