Adds iMeta tags to GIF urls

amethyst/src/androidTest/java/com/vitorpamplona/amethyst/ImageUploadTesting.kt

@@ -105,7 +105,7 @@ class ImageUploadTesting {
         assertEquals("${server.baseUrl}/$initialHash", result.url?.removeSuffix(".png"))
 
         val imageData: ByteArray =
-            ImageDownloader().waitAndGetImage(result.url!!, false)
+            ImageDownloader().waitAndGetImage(result.url!!, false)?.bytes
                 ?: run {
                     fail("${server.name}: Should not be null")
                     return
@@ -148,7 +148,7 @@ class ImageUploadTesting {
         Assert.assertTrue("${server.name}: Invalid result url", url.startsWith("http"))
 
         val imageData: ByteArray =
-            ImageDownloader().waitAndGetImage(url, false)
+            ImageDownloader().waitAndGetImage(url, false)?.bytes
                 ?: run {
                     fail("${server.name}: Should not be null")
                     return

amethyst/src/main/java/com/vitorpamplona/amethyst/service/uploads/FileHeader.kt

@@ -55,10 +55,10 @@ class FileHeader(
             forceProxy: Boolean,
         ): Result<FileHeader> =
             try {
-                val imageData: ByteArray? = ImageDownloader().waitAndGetImage(fileUrl, forceProxy)
+                val imageData: ImageDownloader.Blob? = ImageDownloader().waitAndGetImage(fileUrl, forceProxy)
 
                 if (imageData != null) {
-                    prepare(imageData, mimeType, dimPrecomputed)
+                    prepare(imageData.bytes, mimeType ?: imageData.contentType, dimPrecomputed)
                 } else {
                     Result.failure(UnableToDownload(fileUrl))
                 }

amethyst/src/main/java/com/vitorpamplona/amethyst/service/uploads/ImageDownloader.kt

@@ -29,12 +29,17 @@ import java.net.HttpURLConnection
 import java.net.URL
 
 class ImageDownloader {
+    class Blob(
+        val bytes: ByteArray,
+        val contentType: String?,
+    )
+
     suspend fun waitAndGetImage(
         imageUrl: String,
         forceProxy: Boolean,
-    ): ByteArray? =
+    ): Blob? =
         withContext(Dispatchers.IO) {
-            var imageData: ByteArray? = null
+            var imageData: Blob? = null
             var tentatives = 0
 
             // Servers are usually not ready.. so tries to download it for 15 times/seconds.
@@ -59,7 +64,7 @@ class ImageDownloader {
     private suspend fun tryGetTheImage(
         imageUrl: String,
         forceProxy: Boolean,
-    ): ByteArray? =
+    ): Blob? =
         withContext(Dispatchers.IO) {
             // TODO: Migrate to OkHttp
             HttpURLConnection.setFollowRedirects(true)
@@ -88,7 +93,10 @@ class ImageDownloader {
             }
 
             return@withContext if (responseCode in 200..300) {
-                huc.inputStream.use { it.readBytes() }
+                Blob(
+                    huc.inputStream.use { it.readBytes() },
+                    huc.headerFields.get("Content-Type")?.firstOrNull(),
+                )
             } else {
                 null
             }

amethyst/src/main/java/com/vitorpamplona/amethyst/service/uploads/UploadOrchestrator.kt

@@ -224,15 +224,15 @@ class UploadOrchestrator {
 
         updateState(0.6, UploadingState.Downloading)
 
-        val imageData: ByteArray? = ImageDownloader().waitAndGetImage(uploadResult.url, forceProxy(uploadResult.url))
+        val imageData: ImageDownloader.Blob? = ImageDownloader().waitAndGetImage(uploadResult.url, forceProxy(uploadResult.url))
 
         if (imageData != null) {
             updateState(0.8, UploadingState.Hashing)
 
             val result =
                 FileHeader.prepare(
-                    imageData,
+                    imageData.bytes,
-                    uploadResult.type ?: localContentType,
+                    uploadResult.type ?: localContentType ?: imageData.contentType,
                     uploadResult.dimension,
                 )
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/actions/NewPostViewModel.kt

@@ -20,8 +20,10 @@
  */
 package com.vitorpamplona.amethyst.ui.actions
 
+import android.R.attr.mimeType
 import android.content.Context
 import android.util.Log
+import android.webkit.MimeTypeMap
 import androidx.compose.runtime.Stable
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateListOf
@@ -43,6 +45,7 @@ import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.model.User
 import com.vitorpamplona.amethyst.service.LocationState
 import com.vitorpamplona.amethyst.service.NostrSearchEventOrUserDataSource
+import com.vitorpamplona.amethyst.service.uploads.FileHeader
 import com.vitorpamplona.amethyst.service.uploads.MediaCompressor
 import com.vitorpamplona.amethyst.service.uploads.MultiOrchestrator
 import com.vitorpamplona.amethyst.service.uploads.UploadOrchestrator
@@ -92,6 +95,7 @@ import kotlinx.coroutines.flow.flowOn
 import kotlinx.coroutines.flow.stateIn
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
+import java.util.Locale
 import java.util.UUID
 import kotlin.math.round
 
@@ -1228,6 +1232,28 @@ open class NewPostViewModel : ViewModel() {
             val lastWordStart = it.end - lastWord.length
             val wordToInsert = item.url.url + " "
 
+            viewModelScope.launch(Dispatchers.IO) {
+                val fileExtension: String = MimeTypeMap.getFileExtensionFromUrl(item.url.url)
+                val mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(fileExtension.lowercase(Locale.getDefault()))
+
+                val forceProxy = accountViewModel?.account?.shouldUseTorForImageDownload() ?: false
+                val imeta =
+                    FileHeader.prepare(item.url.url, mimeType, null, forceProxy).getOrNull()?.let {
+                        IMetaTagBuilder(item.url.url)
+                            .apply {
+                                hash(it.hash)
+                                size(it.size)
+                                it.mimeType?.let { mimeType(it) }
+                                it.dim?.let { dims(it) }
+                                it.blurHash?.let { blurhash(it.blurhash) }
+                            }.build()
+                    }
+
+                if (imeta != null) {
+                    iMetaAttachments += imeta
+                }
+            }
+
             message =
                 TextFieldValue(
                     message.text.replaceRange(lastWordStart, it.end, wordToInsert),