Implement tag fetching for rest api as well

lib/check.js

@@ -3,6 +3,7 @@ const https = require('https');
 const github_graphql = require('github-graphql-client');
 const semver = require('semver');
 const query = require('./query');
+const schemeMapper = require('./scheme-mapper');
 const pkg = require('../package.json');
 
 /**
@@ -79,24 +80,32 @@ const rest = (options, callback) => {
       let version = null;
       for (let i = 0; i < json.length; i++) {
         version = json[i];
-        if (semver.gt(version.tag_name, options.currentVersion)) {
+        if (semver.gt(version[options.fetchTags ? 'name' : 'tag_name'], options.currentVersion)) {
           found = true;
           break;
         }
       }
 
       if (found) {
-        callback(null, version);
+        const mapped = schemeMapper[options.fetchTags ? 'tag' : 'release'](version);
+        console.log(mapped);
+        callback(null, mapped);
       } else {
         callback(null, null);
       }
     });
   };
 
   // build url
-  let apiUrl = `https://api.github.com/repos/${options.owner}/${options.repo}/releases`;
-  if (options.latestOnly) {
-    apiUrl += '/latest';
+  let apiUrl = `https://api.github.com/repos/${options.owner}/${options.repo}`;
+  if (options.fetchTags) {
+    apiUrl += '/tags';
+  } else {
+    apiUrl += '/releases';
+
+    if (options.latestOnly) {
+      apiUrl += '/latest';
+    }
   }
 
   // define request options

lib/scheme-mapper.js

@@ -0,0 +1,25 @@
+/**
+ * Maps a response object into the form described here:
+ * https://github.com/axelrindle/github-version-checker/wiki/API#releases
+ */
+module.exports.release = obj => {
+    return {
+        name: obj.name,
+        tag: {
+            name: obj.tag_name
+        },
+        isPrerelease: obj.prerelease,
+        publishedAt: obj.published_at,
+        url: obj.html_url
+    }
+};
+
+/**
+ * Maps a response object into the form described here:
+ * https://github.com/axelrindle/github-version-checker/wiki/API#tags
+ */
+module.exports.tag = obj => {
+    return {
+        name: obj.name
+    }
+};