[API/Podlasie] Add downloading attachments in homework.

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/helper/DownloadAttachment.kt

@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) Kacper Ziubryniewicz 2020-5-14
+ */
+
+package pl.szczodrzynski.edziennik.data.api.edziennik.helper
+
+import im.wangchao.mhttp.Request
+import im.wangchao.mhttp.Response
+import im.wangchao.mhttp.callback.FileCallbackHandler
+import pl.szczodrzynski.edziennik.data.api.ERROR_FILE_DOWNLOAD
+import pl.szczodrzynski.edziennik.data.api.ERROR_REQUEST_FAILURE
+import pl.szczodrzynski.edziennik.data.api.SYSTEM_USER_AGENT
+import pl.szczodrzynski.edziennik.data.api.models.ApiError
+import pl.szczodrzynski.edziennik.utils.Utils
+import java.io.File
+
+class DownloadAttachment(
+        fileUrl: String,
+        val onSuccess: (file: File) -> Unit,
+        val onProgress: (written: Long, total: Long) -> Unit,
+        val onError: (apiError: ApiError) -> Unit
+) {
+    companion object {
+        private const val TAG = "DownloadAttachment"
+    }
+
+    init {
+        val targetFile = Utils.getStorageDir()
+
+        val callback = object : FileCallbackHandler(targetFile) {
+            override fun onSuccess(file: File?, response: Response?) {
+                if (file == null) {
+                    onError(ApiError(TAG, ERROR_FILE_DOWNLOAD)
+                            .withResponse(response))
+                    return
+                }
+
+                try {
+                    onSuccess(file)
+                } catch (e: Exception) {
+                    onError(ApiError(TAG, ERROR_FILE_DOWNLOAD)
+                            .withResponse(response)
+                            .withThrowable(e))
+                }
+            }
+
+            override fun onProgress(bytesWritten: Long, bytesTotal: Long) {
+                try {
+                    this@DownloadAttachment.onProgress(bytesWritten, bytesTotal)
+                } catch (e: Exception) {
+                    onError(ApiError(TAG, ERROR_FILE_DOWNLOAD)
+                            .withThrowable(e))
+                }
+            }
+
+            override fun onFailure(response: Response?, throwable: Throwable?) {
+                onError(ApiError(TAG, ERROR_REQUEST_FAILURE)
+                        .withResponse(response)
+                        .withThrowable(throwable))
+            }
+        }
+
+        Request.builder()
+                .url(fileUrl)
+                .userAgent(SYSTEM_USER_AGENT)
+                .callback(callback)
+                .build()
+                .enqueue()
+    }
+}

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/podlasie/Podlasie.kt

@@ -5,10 +5,13 @@
 package pl.szczodrzynski.edziennik.data.api.edziennik.podlasie
 
 import com.google.gson.JsonObject
+import org.greenrobot.eventbus.EventBus
 import pl.szczodrzynski.edziennik.App
+import pl.szczodrzynski.edziennik.data.api.edziennik.helper.DownloadAttachment
 import pl.szczodrzynski.edziennik.data.api.edziennik.podlasie.data.PodlasieData
 import pl.szczodrzynski.edziennik.data.api.edziennik.podlasie.firstlogin.PodlasieFirstLogin
 import pl.szczodrzynski.edziennik.data.api.edziennik.podlasie.login.PodlasieLogin
+import pl.szczodrzynski.edziennik.data.api.events.AttachmentGetEvent
 import pl.szczodrzynski.edziennik.data.api.interfaces.EdziennikCallback
 import pl.szczodrzynski.edziennik.data.api.interfaces.EdziennikInterface
 import pl.szczodrzynski.edziennik.data.api.models.ApiError
@@ -21,6 +24,7 @@ import pl.szczodrzynski.edziennik.data.db.full.AnnouncementFull
 import pl.szczodrzynski.edziennik.data.db.full.EventFull
 import pl.szczodrzynski.edziennik.data.db.full.MessageFull
 import pl.szczodrzynski.edziennik.utils.Utils
+import java.io.File
 
 class Podlasie(val app: App, val profile: Profile?, val loginStore: LoginStore, val callback: EdziennikCallback) : EdziennikInterface {
     companion object {
@@ -79,7 +83,38 @@ class Podlasie(val app: App, val profile: Profile?, val loginStore: LoginStore,
     }
 
     override fun getAttachment(owner: Any, attachmentId: Long, attachmentName: String) {
+        val fileUrl = attachmentName.substringAfter(":")
+        DownloadAttachment(fileUrl,
+                onSuccess = { file ->
+                    val event = AttachmentGetEvent(
+                            data.profileId,
+                            owner,
+                            attachmentId,
+                            AttachmentGetEvent.TYPE_FINISHED,
+                            file.absolutePath
+                    )
 
+                    val attachmentDataFile = File(Utils.getStorageDir(), ".${data.profileId}_${event.ownerId}_${event.attachmentId}")
+                    Utils.writeStringToFile(attachmentDataFile, event.fileName)
+
+                    EventBus.getDefault().postSticky(event)
+
+                    completed()
+                },
+                onProgress = { written, _ ->
+                    val event = AttachmentGetEvent(
+                            data.profileId,
+                            owner,
+                            attachmentId,
+                            AttachmentGetEvent.TYPE_PROGRESS,
+                            bytesWritten = written
+                    )
+
+                    EventBus.getDefault().postSticky(event)
+                },
+                onError = { apiError ->
+                    data.error(apiError)
+                })
     }
 
     override fun getRecipientList() {

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/podlasie/data/api/PodlasieApiHomework.kt

@@ -10,6 +10,7 @@ import pl.szczodrzynski.edziennik.data.api.edziennik.podlasie.DataPodlasie
 import pl.szczodrzynski.edziennik.data.api.models.DataRemoveModel
 import pl.szczodrzynski.edziennik.data.db.entity.Event
 import pl.szczodrzynski.edziennik.data.db.entity.Metadata
+import pl.szczodrzynski.edziennik.get
 import pl.szczodrzynski.edziennik.getString
 import pl.szczodrzynski.edziennik.utils.models.Date
 
@@ -38,6 +39,15 @@ class PodlasieApiHomework(val data: DataPodlasie, val rows: List<JsonObject>) {
                 homeworkBody = description
             }
 
+            eventObject.attachmentIds = mutableListOf()
+            eventObject.attachmentNames = mutableListOf()
+            homework.getString("Attachments")?.split(',')?.onEach { url ->
+                val filename = "&filename=(.*?)&".toRegex().find(url)?.get(1) ?: return@onEach
+                val ext = "&ext=(.*?)&".toRegex().find(url)?.get(1) ?: return@onEach
+                eventObject.attachmentIds?.add(url.crc32())
+                eventObject.attachmentNames?.add("$filename.$ext:$url")
+            }
+
             data.eventList.add(eventObject)
             data.metadataList.add(
                     Metadata(

app/src/main/java/pl/szczodrzynski/edziennik/data/api/edziennik/vulcan/Vulcan.kt

@@ -157,7 +157,7 @@ class Vulcan(val app: App, val profile: Profile?, val loginStore: LoginStore, va
 
                     completed()
                 },
-                onProgress = { written, total ->
+                onProgress = { written, _ ->
                     val event = AttachmentGetEvent(
                             data.profileId,
                             owner,