Feature: Get app version from Google Play Store rather than hosting a json

build.gradle

@@ -3,10 +3,11 @@
 buildscript {
     repositories {
         jcenter()
+        google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.1.0'
-        classpath 'com.github.dcendents:android-maven-gradle-plugin:1.3'
+        classpath 'com.android.tools.build:gradle:3.1.4'
+        classpath 'com.github.dcendents:android-maven-gradle-plugin:2.1'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }
@@ -15,6 +16,10 @@ buildscript {
 allprojects {
     repositories {
         jcenter()
+        mavenCentral()
+        google()
+
+        maven { url "https://jitpack.io" }
     }
 }
 

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.10-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip

library/build.gradle

@@ -6,13 +6,12 @@ group = 'com.github.eggheadgames'
 
 android {
     compileSdkVersion 25
-    buildToolsVersion "25.0.1"
 
     defaultConfig {
         minSdkVersion 15
         targetSdkVersion 25
         versionCode 13
-        versionName "1.5.2"
+        versionName "1.7.0"
     }
     buildTypes {
         release {
@@ -29,11 +28,12 @@ android {
 }
 
 dependencies {
-    testCompile 'junit:junit:4.12'
-    testCompile 'org.mockito:mockito-core:1.10.19'
-    testCompile 'org.json:json:20160212'
+    testImplementation 'junit:junit:4.12'
+    testImplementation 'org.mockito:mockito-core:1.10.19'
+    testImplementation 'org.json:json:20160212'
 
-    compile fileTree(dir: 'libs', include: ['*.jar'])
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
     //noinspection GradleDependency
-    compile 'com.android.support:appcompat-v7:25.0.0'
+    implementation 'com.android.support:appcompat-v7:25.0.0'
+    implementation 'org.jsoup:jsoup:1.11.3'
 }

library/quality.gradle

@@ -13,7 +13,7 @@ pmd {
   reportsDir = file("$project.buildDir/outputs/")
 }
 
-task findbugs(type: FindBugs, dependsOn: assembleDebug) {
+task findbugs(type: FindBugs, dependsOn: "assembleDebug") {
   description 'Run findbugs'
   group 'verification'
 
@@ -31,7 +31,7 @@ task findbugs(type: FindBugs, dependsOn: assembleDebug) {
   }
 }
 
-task pmd(type: Pmd, dependsOn: assembleDebug) {
+task pmd(type: Pmd, dependsOn: "assembleDebug") {
   description 'Run pmd'
   group 'verification'
 

library/src/main/java/com/eggheadgames/siren/Siren.java

@@ -2,11 +2,17 @@
 
 import android.app.Activity;
 import android.content.Context;
+import android.content.pm.PackageManager;
 import android.os.AsyncTask;
 import android.support.annotation.VisibleForTesting;
+import android.util.Log;
 
 import org.json.JSONException;
 import org.json.JSONObject;
+import org.jsoup.Jsoup;
+import org.jsoup.nodes.Document;
+import org.jsoup.nodes.Element;
+import org.jsoup.select.Elements;
 
 import java.io.BufferedReader;
 import java.io.IOException;
@@ -103,6 +109,19 @@ public void checkVersion(Activity activity, SirenVersionCheckType versionCheckTy
         }
     }
 
+
+    public void checkVersion(Activity activity, SirenVersionCheckType versionCheckType) {
+
+        mActivityRef = new WeakReference<>(activity);
+
+        if (versionCheckType == SirenVersionCheckType.IMMEDIATELY) {
+            performVersionCheck();
+        } else if (versionCheckType.getValue() <= getSirenHelper().getDaysSinceLastCheck(mApplicationContext)
+            ||getSirenHelper().getLastVerificationDate(mApplicationContext) == 0) {
+            performVersionCheck();
+        }
+    }
+
     public void setMajorUpdateAlertType(@SuppressWarnings("SameParameterValue") SirenAlertType majorUpdateAlertType) {
         this.majorUpdateAlertType = majorUpdateAlertType;
     }
@@ -136,6 +155,11 @@ protected void performVersionCheck(String appDescriptionUrl) {
         new LoadJsonTask().execute(appDescriptionUrl);
     }
 
+    @VisibleForTesting
+    protected void performVersionCheck() {
+        new LoadVersionFromGooglePlayStoreTask().execute();
+    }
+
     @VisibleForTesting
     protected void handleVerificationResults(String json) {
         try {
@@ -196,6 +220,7 @@ private boolean checkVersionName(JSONObject appJson) throws JSONException{
         SirenAlertType alertType = null;
         String[] minVersionNumbers = minVersionName.split("\\.");
         String[] currentVersionNumbers = currentVersionName.split("\\.");
+
         //noinspection ConstantConditions
         if (minVersionNumbers != null && currentVersionNumbers != null
                 && minVersionNumbers.length == currentVersionNumbers.length) {
@@ -349,4 +374,51 @@ protected void onPostExecute(String result) {
             }
         }
     }
+
+    private static class LoadVersionFromGooglePlayStoreTask extends AsyncTask<Void, Void, String> {
+
+        @Override
+        protected String doInBackground(Void... voids) {
+            String newVersion = null;
+            String packageName = Siren.sirenInstance.getSirenHelper().getPackageName(Siren.sirenInstance.mApplicationContext);
+
+            try {
+                Document document = Jsoup.connect("https://play.google.com/store/apps/details?id=" + packageName + "&hl=en")
+                    .timeout(30000)
+                    .userAgent("Mozilla/5.0 (Windows; U; WindowsNT 5.1; en-US; rv1.8.1.6) Gecko/20070725 Firefox/2.0.0.6")
+                    .referrer("http://www.google.com")
+                    .get();
+                if (document != null) {
+                    Elements element = document.getElementsContainingOwnText("Current Version");
+                    for (Element ele : element) {
+                        if (ele.siblingElements() != null) {
+                            Elements sibElemets = ele.siblingElements();
+                            for (Element sibElemet : sibElemets) {
+                                newVersion = sibElemet.text();
+                            }
+                        }
+                    }
+                }
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+
+            return newVersion;
+        }
+
+        @Override
+        protected void onPostExecute(String newVersion) {
+            super.onPostExecute(newVersion);
+
+            if (Siren.sirenInstance.getSirenHelper().isEmpty(newVersion)) {
+                if (Siren.sirenInstance.mSirenListener != null) {
+                    Siren.sirenInstance.mSirenListener.onError(new NullPointerException());
+                }
+            } else {
+                String packageName = Siren.sirenInstance.getSirenHelper().getPackageName(Siren.sirenInstance.mApplicationContext);
+                String jsonString = "{ \"" + packageName + "\": { \"" + Constants.JSON_MIN_VERSION_NAME +"\": \"" + newVersion + "\" } }";
+                Siren.sirenInstance.handleVerificationResults(jsonString);
+            }
+        }
+    }
 }