Using object for JavaGuard. May move java downloading processes to AssetGuard as a non-default category. Very much a WIP.

app/assets/js/javaguard.js

@@ -1,67 +1,17 @@
 const cp = require('child_process')
+const EventEmitter = require('events')
 const fs = require('fs')
 const path = require('path')
 const Registry = require('winreg')
 const request = require('request')
 
-/**
+const PLATFORM_MAP = {
- * Attempts to find a valid x64 installation of Java on Windows machines.
+    win32: '-windows-x64.tar.gz',
- * Possible paths will be pulled from the registry and the JAVA_HOME environment
+    darwin: '-macosx-x64.tar.gz',
- * variable. The paths will be sorted with higher versions preceeding lower, and
+    linux: '-linux-x64.tar.gz'
- * JREs preceeding JDKs. The binaries at the sorted paths will then be validated.
- * The first validated is returned.
- * 
- * Higher versions > Lower versions
- * If versions are equal, JRE > JDK.
- * 
- * @returns {string} The root path of a valid x64 Java installation. If none are
- * found, null is returned.
- */
-async function _win32Validate(){
-
-    // Get possible paths from the registry.
-    const pathSet = await _scanRegistry()
-
-    console.log(Array.from(pathSet)) // DEBUGGING
-
-    // Validate JAVA_HOME
-    const jHome = _scanJavaHome()
-    if(jHome != null && jHome.indexOf('(x86)') === -1){
-        pathSet.add(jHome)
 }
 
-    // Convert path set to an array for processing.
+class JavaGuard extends EventEmitter {
-    let pathArr = Array.from(pathSet)
-
-    console.log(pathArr) // DEBUGGING
-
-    // Sorts array. Higher version numbers preceed lower. JRE preceeds JDK.
-    pathArr = pathArr.sort((a, b) => {
-        // Note that Java 9+ uses semver and that will need to be accounted for in
-        // the future.
-        const aVer = parseInt(a.split('_')[1])
-        const bVer = parseInt(b.split('_')[1])
-        if(bVer === aVer){
-            return a.indexOf('jdk') > -1 ? 1 : 0
-        } else {
-            return bVer - aVer
-        }
-    })
-
-    console.log(pathArr) // DEBUGGING
-
-    // Validate that the binary is actually x64.
-    for(let i=0; i<pathArr.length; i++) {
-        let res = await _validateBinary(pathArr[i])
-        if(res){
-            return pathArr[i]
-        }
-    }
-
-    // No suitable candidates found.
-    return null;
-
-}
 
     /**
      * Validates that a Java binary is at least 64 bit. This makes use of the non-standard
@@ -76,7 +26,7 @@ async function _win32Validate(){
      * @returns {Promise.<boolean>} Resolves to false only if the test is successful and the result
      * is less than 64.
      */
-function _validateBinary(binaryPath){
+    static _validateBinary(binaryPath){
 
         return new Promise((resolve, reject) => {
             const fBp = path.join(binaryPath, 'bin', 'java.exe')
@@ -119,7 +69,7 @@ function _validateBinary(binaryPath){
      * 
      * @returns {string} The path defined by JAVA_HOME, if it exists. Otherwise null.
      */
-function _scanJavaHome(){
+    static _scanJavaHome(){
         const jHome = process.env.JAVA_HOME
         try {
             let res = fs.existsSync(jHome)
@@ -137,7 +87,7 @@ function _scanJavaHome(){
      * @returns {Promise.<Set.<string>>} A promise which resolves to a set of 64-bit Java root
      * paths found in the registry.
      */
-function _scanRegistry(){
+    static _scanRegistry(){
 
         return new Promise((resolve, reject) => {
             // Keys for Java v9.0.0 and later:
@@ -162,17 +112,19 @@ function _scanRegistry(){
                     key: regKeys[i],
                     arch: 'x64'
                 })
+                key.keyExists((err, exists) => {
+                    if(exists) {
                         key.keys((err, javaVers) => {
                             if(err){
                                 console.error(err)
-                    if(i === regKeys.length-1){
+                                if(i === regKeys.length-1 && cbAcc === cbTracker){
                                     resolve(candidates)
                                 }
                             } else {
                                 cbTracker += javaVers.length
                                 if(i === regKeys.length-1 && cbTracker === cbAcc){
                                     resolve(candidates)
-                    }
+                                } else {
                                     for(let j=0; j<javaVers.length; j++){
                                         const javaVer = javaVers[j]
                                         const vKey = javaVer.key.substring(javaVer.key.lastIndexOf('\\')+1)
@@ -182,15 +134,28 @@ function _scanRegistry(){
                                                 const jHome = res.value
                                                 if(jHome.indexOf('(x86)') === -1){
                                                     candidates.add(jHome)
-                                    cbAcc++
+                                                    
                                                 }
-                                if(cbAcc === cbTracker){
+                                                cbAcc++
+                                                if(i === regKeys.length-1 && cbAcc === cbTracker){
                                                     resolve(candidates)
                                                 }
                                             })
+                                        } else {
+                                            cbAcc++
+                                            if(i === regKeys.length-1 && cbAcc === cbTracker){
+                                                resolve(candidates)
                                             }
                                         }
                                     }
+                                }
+                            }
+                        })
+                    } else {
+                        if(i === regKeys.length-1 && cbAcc === cbTracker){
+                            resolve(candidates)
+                        }
+                    }
                 })
             }
 
@@ -198,54 +163,121 @@ function _scanRegistry(){
         
     }
 
+    /**
+     * Attempts to find a valid x64 installation of Java on Windows machines.
+     * Possible paths will be pulled from the registry and the JAVA_HOME environment
+     * variable. The paths will be sorted with higher versions preceeding lower, and
+     * JREs preceeding JDKs. The binaries at the sorted paths will then be validated.
+     * The first validated is returned.
+     * 
+     * Higher versions > Lower versions
+     * If versions are equal, JRE > JDK.
+     * 
+     * @returns {string} The root path of a valid x64 Java installation. If none are
+     * found, null is returned.
+     */
+    static async _win32Validate(){
+
+        // Get possible paths from the registry.
+        const pathSet = await JavaGuard._scanRegistry()
+
+        console.log(Array.from(pathSet)) // DEBUGGING
+
+        // Validate JAVA_HOME
+        const jHome = JavaGuard._scanJavaHome()
+        if(jHome != null && jHome.indexOf('(x86)') === -1){
+            pathSet.add(jHome)
+        }
+
+        // Convert path set to an array for processing.
+        let pathArr = Array.from(pathSet)
+
+        console.log(pathArr) // DEBUGGING
+
+        // Sorts array. Higher version numbers preceed lower. JRE preceeds JDK.
+        pathArr = pathArr.sort((a, b) => {
+            // Note that Java 9+ uses semver and that will need to be accounted for in
+            // the future.
+            const aVer = parseInt(a.split('_')[1])
+            const bVer = parseInt(b.split('_')[1])
+            if(bVer === aVer){
+                return a.indexOf('jdk') > -1 ? 1 : 0
+            } else {
+                return bVer - aVer
+            }
+        })
+
+        console.log(pathArr) // DEBUGGING
+
+        // Validate that the binary is actually x64.
+        for(let i=0; i<pathArr.length; i++) {
+            let res = await JavaGuard._validateBinary(pathArr[i])
+            if(res){
+                return pathArr[i]
+            }
+        }
+
+        // No suitable candidates found.
+        return null;
+
+    }
+
     /**
      * WIP ->  get a valid x64 Java path on macOS.
      */
-function _darwinValidate(){
+    static async _darwinValidate(){
         return null
     }
 
     /**
      * WIP ->  get a valid x64 Java path on linux.
      */
-function _linuxValidate(){
+    static async _linuxValidate(){
         return null
     }
 
-// This will eventually return something.
+    static async validate(){
-async function validate(){
+        return await JavaGuard['_' + process.platform + 'Validate']()
-
-    let res = null
-
-    const opSys = process.platform
-    if(opSys === 'win32'){
-        res = await _win32Validate()
-    } else if(opSys === 'darwin'){
-        res = _darwinValidate()
-    } else if(opSys === 'linux'){
-        res = _linuxValidate()
     }
 
-    return res;
+    // WIP -> Downloading Suite
 
+    static _latestJREOracle(){
+
+        const url = 'http://www.oracle.com/technetwork/java/javase/downloads/jre8-downloads-2133155.html'
+        const regex = /http:\/\/.+?(?=\/java)\/java\/jdk\/([0-9]+u[0-9]+)-(b[0-9]+)\/([a-f0-9]{32})?\/jre-\1/
+    
+        return new Promise((resolve, reject) => {
+            request(url, (err, resp, body) => {
+                if(!err){
+                    const arr = body.match(regex)
+                    const verSplit = arr[1].split('u')
+                    resolve({
+                        uri: arr[0],
+                        version: {
+                            major: verSplit[0],
+                            update: verSplit[1],
+                            build: arr[2]
+                        }
+                    })
+                } else {
+                    resolve(null)
+                }
+            })
+        })
     }
 
-const PLATFORM_MAP = {
+    async _downloadOracleJRE(acceptLicense, dir){
-    win32: '-windows-x64.tar.gz',
-    darwin: '-macosx-x64.tar.gz',
-    linux: '-linux-x64.tar.gz'
-}
 
-const BASE_URL = 'http://download.oracle.com/otn-pub/java/jdk/8u161-b12/2f38c3b165be4555a1fa6e98c45e0808/jre-8u161'
-
-function _downloadJava(acceptLicense, dir){
         if(!acceptLicense){
             return
         }
     
         // TODO -> Complete this code. See format used in assetguard.js#510
     
-    const combined = BASE_URL + PLATFORM_MAP[process.platform]
+        const latestData = await JavaGuard._latestJREOracle()
+    
+        const combined = latestData.uri + PLATFORM_MAP[process.platform]
         const name = combined.substring(combined.lastIndexOf('/')+1)
         const fDir = path.join(dir, name)
     
@@ -260,15 +292,24 @@ function _downloadJava(acceptLicense, dir){
         let writeStream = fs.createWriteStream(fDir)
         req.pipe(writeStream)
         req.resume()
+    
+    }
+
+    _downloadJava(dir){
+        this._downloadOracleJRE(true, dir)
+    }
+
 }
 
 async function test(){
-    console.log(await validate())
+    //console.log(await JavaGuard.validate())
+    const g = new JavaGuard()
+    g._downloadJava('C:\\Users\\Asus\\Desktop\\LauncherElectron\\target\\')
+    //console.log(JSON.stringify(await _latestJREOracle()))
 }
 
-//test()
+test()
-_downloadJava(true, 'C:\\Users\\Asus\\Desktop\\LauncherElectron\\target\\')
 
 module.exports = {
-    validate
+    JavaGuard
 }

app/assets/westeroscraft.json

@@ -5,6 +5,9 @@
         "smallImageText": "WesterosCraft",
         "smallImageKey": "seal-circle"
     },
+    "java": {
+        "oracle": "http://www.oracle.com/technetwork/java/javase/downloads/jre8-downloads-2133155.html"
+    },
     "servers": [
         {
             "id": "WesterosCraft-1.11.2",