Add DataFetcher class

app/build.gradle

@@ -45,4 +45,6 @@ dependencies {
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test:runner:1.2.0'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+    implementation 'com.google.code.gson:gson:2.8.5'
+    implementation 'org.jsoup:jsoup:1.12.1'
 }

app/src/main/AndroidManifest.xml

@@ -2,6 +2,8 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="net.underdesk.circolapp">
 
+    <uses-permission android:name="android.permission.INTERNET" />
+
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"

app/src/main/java/net/underdesk/circolapp/server/DataFetcher.kt

@@ -0,0 +1,58 @@
+package net.underdesk.circolapp.server
+
+import com.google.gson.Gson
+import net.underdesk.circolapp.server.pojo.Response
+import org.jsoup.Jsoup
+import java.io.IOException
+import java.net.URL
+import javax.net.ssl.HttpsURLConnection
+
+class DataFetcher {
+    companion object {
+        const val ENDPOINT_URL = "https://www.curiepinerolo.edu.it/wp-json/wp/v2/pages/5958"
+
+        val gson = Gson()
+    }
+
+    @Throws(IOException::class)
+    fun getCircularsFromServer(): ArrayList<Pair<String, String>> {
+        val json = gson.fromJson(retrieveDataFromServer(), Response::class.java)
+
+        val document = Jsoup.parseBodyFragment(json.content!!.rendered)
+        val htmlList = document.getElementsByTag("ul")[0].getElementsByTag("a")
+
+        val list = ArrayList<Pair<String, String>>()
+
+        htmlList.forEach { element ->
+            list.add(Pair(element.text(), element.attr("href")))
+        }
+
+        return list
+    }
+
+    @Throws(IOException::class)
+    fun retrieveDataFromServer(): String? {
+        var connection: HttpsURLConnection? = null
+        return try {
+            connection = (URL(ENDPOINT_URL).openConnection() as? HttpsURLConnection)
+            connection?.run {
+                // Set GET HTTP method
+                requestMethod = "GET"
+
+                setRequestProperty("Accept-Encoding", "none")
+
+                connect()
+                if (responseCode != HttpsURLConnection.HTTP_OK) {
+                    throw IOException("HTTP error code: $responseCode")
+                }
+
+                inputStream?.reader()?.readText()
+            }
+        } finally {
+            // Close Stream and disconnect HTTPS connection.
+            connection?.inputStream?.close()
+            connection?.disconnect()
+        }
+
+    }
+}

app/src/main/java/net/underdesk/circolapp/server/pojo/Content.kt

@@ -0,0 +1,5 @@
+package net.underdesk.circolapp.server.pojo
+
+data class Content(
+    val rendered: String? = null
+)

app/src/main/java/net/underdesk/circolapp/server/pojo/Response.kt

@@ -0,0 +1,5 @@
+package net.underdesk.circolapp.server.pojo
+
+data class Response(
+    val content: Content? = null
+)