Merge pull request #7 from Priyansh-Kedia/caching

added caching

Author: pknotfound

OGParser/build.gradle

@@ -45,10 +45,17 @@ dependencies {
     // OpenGraph
     implementation 'org.jsoup:jsoup:1.10.3'
 
+    // Preference AndroidX
+    def preference_version = "1.1.1"
+    implementation "androidx.preference:preference-ktx:$preference_version"
+
+    //ktx
+    implementation 'androidx.core:core-ktx:1.6.0'
+
     //Architecture
     def lifecycle_version = '2.2.0'
 
     implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.3.9'
 //    implementation "androidx.lifecycle:lifecycle-extensions:${lifecycle_version}"
 //    implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:${lifecycle_version}"
-}
+}

OGParser/src/main/java/com/kedia/ogparser/OpenGraphParser.kt

@@ -1,16 +1,19 @@
 package com.kedia.ogparser
 
-import android.util.Log
+import android.content.Context
 import kotlinx.coroutines.*
 import org.jsoup.Jsoup
 import kotlin.coroutines.CoroutineContext
 
 
 class OpenGraphParser(
     private val listener: OpenGraphCallback,
-    private var showNullOnEmpty: Boolean = false
+    private var showNullOnEmpty: Boolean = false,
+    private val context: Context? = null
 ) {
 
+    private val sharedPrefs: SharedPrefs? = context?.let { SharedPrefs(it) }
+
     private var url: String = ""
 
     private val AGENT = "Mozilla"
@@ -52,7 +55,9 @@ class OpenGraphParser(
         if (!url.contains("http")) {
             url = "http://$url"
         }
-
+        if (sharedPrefs?.urlExists(url) == true) {
+            return@withContext sharedPrefs?.getOpenGraphResult(url)
+        }
         openGraphResult = OpenGraphResult()
         try {
             val response = Jsoup.connect(url)
@@ -108,7 +113,7 @@ class OpenGraphParser(
             }
             return@withContext null
         }
-
+        openGraphResult?.let { sharedPrefs?.setOpenGraphResult(it, url) }
         return@withContext openGraphResult
     }
 }

OGParser/src/main/java/com/kedia/ogparser/SharedPrefs.kt

@@ -0,0 +1,94 @@
+package com.kedia.ogparser
+
+import android.content.Context
+import android.content.SharedPreferences
+import androidx.preference.PreferenceManager
+
+class SharedPrefs(context: Context) {
+
+    private val pm: SharedPreferences = PreferenceManager.getDefaultSharedPreferences(context)
+
+    private val OG_PARSER = "Og_Parser"
+    private val TITLE = OG_PARSER + "_title"
+    private val DESCRIPTION = OG_PARSER + "_description"
+    private val URL = OG_PARSER + "_url"
+    private val IMAGE = OG_PARSER + "_image"
+    private val SITE_NAME = OG_PARSER + "_site_name"
+    private val TYPE = OG_PARSER + "_type"
+
+    fun setTitle(link: String, title: String) {
+        pm.edit().putString(TITLE + "_$link", title).apply()
+    }
+
+    fun getTitle(link: String): String {
+        return pm.getString(TITLE + "_$link", "") ?: ""
+    }
+
+    fun setDescription(link: String, description: String) {
+        pm.edit().putString(DESCRIPTION + "_$link", description).apply()
+    }
+
+    fun getDescription(link: String): String {
+        return pm.getString(DESCRIPTION + "_$link", "") ?: ""
+    }
+
+    fun setUrl(link: String, url: String) {
+        pm.edit().putString(URL + "_$link", url).apply()
+    }
+
+    fun getUrl(link: String): String {
+        return pm.getString(URL + "_$link", "") ?: ""
+    }
+
+    fun setImage(link: String, image: String) {
+        pm.edit().putString(IMAGE + "_$link", image).apply()
+    }
+
+    fun getImage(link: String): String {
+        return pm.getString(IMAGE + "_$link", "") ?: ""
+    }
+
+    fun setSiteName(link: String, siteName: String) {
+        pm.edit().putString(SITE_NAME + "_$link", siteName).apply()
+    }
+
+    fun getSiteName(link: String): String {
+        return pm.getString(SITE_NAME + "_$link", "") ?: ""
+    }
+
+    fun setType(link: String, type: String) {
+        pm.edit().putString(TYPE + "_$link", type).apply()
+    }
+
+    fun getType(link: String): String {
+        return pm.getString(TYPE + "_$link", "") ?: ""
+    }
+
+    fun setOpenGraphResult(openGraphResult: OpenGraphResult, url: String) {
+        setTitle(url, openGraphResult.title.toString())
+        setDescription(url, openGraphResult.description.toString())
+        setImage(url, openGraphResult.image.toString())
+        setSiteName(url, openGraphResult.siteName.toString())
+        setType(url, openGraphResult.type.toString())
+        setUrl(url, openGraphResult.url.toString())
+    }
+
+    fun getOpenGraphResult(url: String): OpenGraphResult {
+        val title = getTitle(url)
+        val description = getDescription(url)
+        val image = getImage(url)
+        val siteName = getSiteName(url)
+        val type = getType(url)
+        val url = getUrl(url)
+        return OpenGraphResult(title, description, url, image, siteName, type)
+    }
+
+    fun urlExists(url: String): Boolean {
+        val title = getTitle(url)
+        val description = getDescription(url)
+        val image = getImage(url)
+
+        return title.isNotEmpty() && description.isNotEmpty() && image.isNotEmpty()
+    }
+
+}

app/build.gradle

@@ -45,5 +45,4 @@ dependencies {
     androidTestImplementation 'androidx.test.ext:junit:1.1.3'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
 
-
 }

app/src/main/java/com/kedia/opengraphpreview/MainActivity.kt

@@ -14,16 +14,20 @@ class MainActivity : AppCompatActivity(), OpenGraphCallback {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
 
-        val openGraphParser = OpenGraphParser(this)
+        val openGraphParser = OpenGraphParser(this, context = this)
         openGraphParser.parse("https://www.youtube.com")
+
+        button.setOnClickListener {
+            openGraphParser.parse(tview.text.toString())
+        }
     }
 
     override fun onPostResponse(openGraphResult: OpenGraphResult) {
-        tview.text = openGraphResult.toString()
+        tview.setText(openGraphResult.toString())
     }
 
     override fun onError(error: String) {
         Log.e("TAG!!!!", "$error")
-        tview.text = error
+//        tview.text = error
     }
 }

app/src/main/res/layout/activity_main.xml

@@ -6,14 +6,25 @@
     android:layout_height="match_parent"
     tools:context=".MainActivity">
 
-    <TextView
+    <EditText
         android:id="@+id/tview"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="Hello World!"
+        android:hint="Hello World!"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintLeft_toLeftOf="parent"
         app:layout_constraintRight_toRightOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
+    <Button
+        android:id="@+id/button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Button"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/tview" />
+
+
 </androidx.constraintlayout.widget.ConstraintLayout>