Add support for all file types for circulars and attachments

app/src/main/java/net/underdesk/circolapp/MainActivity.kt

@@ -40,7 +40,7 @@ import com.google.android.material.snackbar.Snackbar
 import com.mikepenz.aboutlibraries.LibsBuilder
 import kotlinx.android.synthetic.main.activity_main.*
 import net.underdesk.circolapp.adapters.CircularLetterAdapter
-import net.underdesk.circolapp.data.Circular
+import net.underdesk.circolapp.utils.DownloadableFile
 import net.underdesk.circolapp.works.PollWork
 
 class MainActivity : AppCompatActivity(), CircularLetterAdapter.AdapterCallback {
@@ -51,7 +51,7 @@ class MainActivity : AppCompatActivity(), CircularLetterAdapter.AdapterCallback
 
     var searchCallback: SearchCallback? = null
     var refreshCallback: RefreshCallback? = null
-    override var circularToDownload: Circular? = null
+    override var fileToDownload: DownloadableFile? = null
 
     override fun onCreate(savedInstanceState: Bundle?) {
         loadDarkTheme()
@@ -131,7 +131,7 @@ class MainActivity : AppCompatActivity(), CircularLetterAdapter.AdapterCallback
             PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE -> {
                 // If request is cancelled, the result arrays are empty.
                 if ((grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED)) {
-                    downloadCircular()
+                    downloadFile()
                 } else {
                     Snackbar.make(
                         container,
@@ -144,12 +144,18 @@ class MainActivity : AppCompatActivity(), CircularLetterAdapter.AdapterCallback
         }
     }
 
-    override fun downloadCircular() {
-        val request = DownloadManager.Request(Uri.parse(circularToDownload!!.url))
-        request.setTitle(circularToDownload!!.name)
+    override fun downloadFile() {
+        val regexDots = Regex("""\.+$""")
+        val safeFilename = fileToDownload!!.name.replace(regexDots, "")
+
+        var extension = fileToDownload!!.url.substringAfterLast(".", "html")
+        if (!extension.matches(Regex("""[a-zA-Z]+"""))) extension = "html"
+
+        val request = DownloadManager.Request(Uri.parse(fileToDownload!!.url))
+        request.setTitle(fileToDownload!!.name)
         request.setDestinationInExternalPublicDir(
             Environment.DIRECTORY_DOWNLOADS,
-            "Circolapp/" + circularToDownload!!.id + ".pdf"
+            "Circolapp/$safeFilename.$extension"
         )
 
         (getSystemService(Context.DOWNLOAD_SERVICE) as DownloadManager).enqueue(request)

app/src/main/java/net/underdesk/circolapp/adapters/AttachmentAdapter.kt

@@ -18,24 +18,22 @@
 
 package net.underdesk.circolapp.adapters
 
-import android.app.DownloadManager
 import android.content.Context
-import android.content.Intent
-import android.net.Uri
-import android.os.Environment
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.widget.ImageButton
 import android.widget.TextView
-import androidx.appcompat.app.AlertDialog
 import androidx.recyclerview.widget.RecyclerView
 import kotlinx.android.synthetic.main.item_attachment.view.*
 import net.underdesk.circolapp.R
+import net.underdesk.circolapp.utils.DownloadableFile
+import net.underdesk.circolapp.utils.FileUtils
 
 class AttachmentAdapter(
     private val attachmentsNames: List<String>,
-    private val attachmentsUrls: List<String>
+    private val attachmentsUrls: List<String>,
+    private val adapterCallback: CircularLetterAdapter.AdapterCallback
 ) :
     RecyclerView.Adapter<AttachmentAdapter.AttachmentViewHolder>() {
     private lateinit var context: Context
@@ -58,35 +56,12 @@ class AttachmentAdapter(
         holder.title.text = attachmentsNames[position]
 
         holder.viewButton.setOnClickListener {
-            val viewIntent = Intent(Intent.ACTION_VIEW)
-            viewIntent.setDataAndType(Uri.parse(attachmentsUrls[position]), "application/pdf")
-            if (viewIntent.resolveActivity(context.packageManager) != null) {
-                context.startActivity(viewIntent)
-            } else {
-                val builder = AlertDialog.Builder(context)
-                builder.apply {
-                    setTitle(R.string.dialog_install_pdf_reader_title)
-                    setMessage(R.string.dialog_install_pdf_reader_content)
-                    setPositiveButton(
-                        R.string.dialog_ok
-                    ) { dialog, _ ->
-                        dialog.dismiss()
-                    }
-                }
-
-                builder.create().show()
-            }
+            FileUtils.viewFile(attachmentsUrls[position], context)
         }
 
         holder.downloadButton.setOnClickListener {
-            val request = DownloadManager.Request(Uri.parse(attachmentsUrls[position]))
-            request.setTitle(attachmentsNames[position])
-            request.setDestinationInExternalPublicDir(
-                Environment.DIRECTORY_DOWNLOADS,
-                "Circolapp/" + attachmentsNames[position] + ".pdf"
-            )
-
-            (context.getSystemService(Context.DOWNLOAD_SERVICE) as DownloadManager).enqueue(request)
+            val file = DownloadableFile(attachmentsNames[position], attachmentsUrls[position])
+            FileUtils.downloadFile(file, adapterCallback, context)
         }
     }
 

app/src/main/java/net/underdesk/circolapp/adapters/CircularLetterAdapter.kt

@@ -18,33 +18,27 @@
 
 package net.underdesk.circolapp.adapters
 
-import android.Manifest
 import android.app.PendingIntent
 import android.content.Context
 import android.content.Intent
-import android.content.pm.PackageManager
-import android.net.Uri
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.widget.ImageButton
 import android.widget.TextView
-import androidx.appcompat.app.AlertDialog
-import androidx.appcompat.app.AppCompatActivity
 import androidx.cardview.widget.CardView
-import androidx.core.app.ActivityCompat
-import androidx.core.content.ContextCompat
 import androidx.core.content.ContextCompat.getDrawable
 import androidx.fragment.app.FragmentActivity
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import kotlinx.android.synthetic.main.item_circular.view.*
 import net.underdesk.circolapp.AlarmBroadcastReceiver
-import net.underdesk.circolapp.MainActivity
 import net.underdesk.circolapp.R
 import net.underdesk.circolapp.data.AppDatabase
 import net.underdesk.circolapp.data.Circular
 import net.underdesk.circolapp.fragments.NewReminderFragment
+import net.underdesk.circolapp.utils.DownloadableFile
+import net.underdesk.circolapp.utils.FileUtils
 
 class CircularLetterAdapter(
     private var circulars: List<Circular>,
@@ -146,7 +140,8 @@ class CircularLetterAdapter(
                 holder.attachmentsList.visibility = View.VISIBLE
                 holder.attachmentsList.adapter = AttachmentAdapter(
                     circulars[position].attachmentsNames,
-                    circulars[position].attachmentsUrls
+                    circulars[position].attachmentsUrls,
+                    adapterCallback
                 )
             } else {
                 holder.attachmentsList.adapter = null
@@ -154,56 +149,12 @@ class CircularLetterAdapter(
         }
 
         holder.viewButton.setOnClickListener {
-            val viewIntent = Intent(Intent.ACTION_VIEW)
-            viewIntent.setDataAndType(Uri.parse(circulars[position].url), "application/pdf")
-            if (viewIntent.resolveActivity(context.packageManager) != null) {
-                context.startActivity(viewIntent)
-            } else {
-                val builder = AlertDialog.Builder(context)
-                builder.apply {
-                    setTitle(R.string.dialog_install_pdf_reader_title)
-                    setMessage(R.string.dialog_install_pdf_reader_content)
-                    setPositiveButton(
-                        R.string.dialog_ok
-                    ) { dialog, _ ->
-                        dialog.dismiss()
-                    }
-                }
-
-                builder.create().show()
-            }
+            FileUtils.viewFile(circulars[position].url, context)
         }
 
         holder.downloadButton.setOnClickListener {
-            adapterCallback.circularToDownload = circulars[position]
-
-            val permission = ContextCompat.checkSelfPermission(
-                context,
-                Manifest.permission.WRITE_EXTERNAL_STORAGE
-            )
-
-            if (permission != PackageManager.PERMISSION_GRANTED) {
-
-                val builder = AlertDialog.Builder(context)
-
-                builder.apply {
-                    setMessage(context.getString(R.string.dialog_message_permission_write))
-                    setTitle(context.getString(R.string.dialog_title_permission_required))
-                    setPositiveButton(
-                        context.getString(R.string.dialog_next)
-                    ) { _, _ ->
-                        ActivityCompat.requestPermissions(
-                            adapterCallback as AppCompatActivity,
-                            arrayOf(Manifest.permission.WRITE_EXTERNAL_STORAGE),
-                            MainActivity.PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE
-                        )
-                    }
-                }
-
-                builder.create().show()
-            } else {
-                adapterCallback.downloadCircular()
-            }
+            val file = DownloadableFile(circulars[position].name, circulars[position].url)
+            FileUtils.downloadFile(file, adapterCallback, context)
         }
 
         holder.favouriteButton.setOnClickListener {
@@ -274,7 +225,7 @@ class CircularLetterAdapter(
     override fun getItemId(position: Int) = circulars[position].id
 
     interface AdapterCallback {
-        var circularToDownload: Circular?
-        fun downloadCircular()
+        var fileToDownload: DownloadableFile?
+        fun downloadFile()
     }
 }

app/src/main/java/net/underdesk/circolapp/utils/FileUtils.kt

@@ -0,0 +1,85 @@
+package net.underdesk.circolapp.utils
+
+import android.Manifest
+import android.content.Context
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.net.Uri
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.app.ActivityCompat
+import androidx.core.content.ContextCompat
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import net.underdesk.circolapp.MainActivity
+import net.underdesk.circolapp.R
+import net.underdesk.circolapp.adapters.CircularLetterAdapter
+
+object FileUtils {
+    fun viewFile(url: String, context: Context) {
+        val viewIntent = Intent(Intent.ACTION_VIEW)
+
+        if (url.endsWith(".pdf")) {
+            viewIntent.setDataAndType(Uri.parse(url), "application/pdf")
+
+            if (viewIntent.resolveActivity(context.packageManager) == null) {
+                val builder = MaterialAlertDialogBuilder(context)
+                builder.apply {
+                    setTitle(R.string.dialog_install_pdf_reader_title)
+                    setMessage(R.string.dialog_install_pdf_reader_content)
+                    setPositiveButton(
+                        R.string.dialog_ok
+                    ) { dialog, _ ->
+                        dialog.dismiss()
+                    }
+                }
+
+                builder.create().show()
+
+                return
+            }
+        } else {
+            viewIntent.data = Uri.parse(url)
+        }
+
+        context.startActivity(viewIntent)
+    }
+
+    fun downloadFile(
+        file: DownloadableFile,
+        adapterCallback: CircularLetterAdapter.AdapterCallback,
+        context: Context
+    ) {
+        adapterCallback.fileToDownload = file
+
+        val permission = ContextCompat.checkSelfPermission(
+            context,
+            Manifest.permission.WRITE_EXTERNAL_STORAGE
+        )
+
+        if (permission != PackageManager.PERMISSION_GRANTED) {
+            val builder = MaterialAlertDialogBuilder(context)
+
+            builder.apply {
+                setMessage(context.getString(R.string.dialog_message_permission_write))
+                setTitle(context.getString(R.string.dialog_title_permission_required))
+                setPositiveButton(
+                    context.getString(R.string.dialog_next)
+                ) { _, _ ->
+                    ActivityCompat.requestPermissions(
+                        adapterCallback as AppCompatActivity,
+                        arrayOf(Manifest.permission.WRITE_EXTERNAL_STORAGE),
+                        MainActivity.PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE
+                    )
+                }
+            }
+
+            builder.create().show()
+        } else {
+            adapterCallback.downloadFile()
+        }
+    }
+}
+
+data class DownloadableFile(
+    val name: String,
+    val url: String
+)