feat: finish parsing the repo url

Author: Gyumeijie

.gitignore

@@ -1 +1,2 @@
 .idea/*
+node_modules/*

download.js

@@ -0,0 +1,52 @@
+var url = require('url');
+
+
+const AUTHOR = 1;
+const REPOSITORY = 2;
+const BRANCH = 4;
+
+
+var parameters = {
+    url: "https://github.com/reduxjs/redux/tree/master/examples/async",
+    fileName: undefined,
+    rootDirectory: undefined
+};
+
+
+function parseInfo(parameters) {
+    var repoPath = url.parse(parameters.url, true).pathname;
+    var splitPath = repoPath.split("/");
+    var info = {};
+
+    info.author = splitPath[AUTHOR];
+    info.repository = splitPath[REPOSITORY];
+    info.branch = splitPath[BRANCH];
+
+    info.rootName = splitPath[splitPath.length-1];
+    if(!!splitPath[BRANCH]){
+        info.resPath = repoPath.substring(
+            repoPath.indexOf(splitPath[BRANCH])+splitPath[BRANCH].length+1
+        );
+    }
+
+    info.urlPrefix = "https://api.github.com/repos/"+ info.author+"/"+info.repository+"/contents/";
+    info.urlPostfix = "?ref="+info.branch;
+
+    if(!parameters.fileName || parameters.fileName == ""){
+        info.downloadFileName = info.rootName;
+    } else {
+        info.downloadFileName = parameters.fileName;
+    }
+
+    if(parameters.rootDirectory == "false"){
+        info.rootDirectoryName = "";
+    } else if (!parameters.rootDirectory || parameters.rootDirectory == "" ||
+        parameters.rootDirectory == "true"){
+        info.rootDirectoryName = info.rootName+"/";
+    } else {
+        info.rootDirectoryName = parameters.rootDirectory+"/";
+    }
+
+    return info;
+}
+