add getter for metadata

firebase-storage/src/androidMain/kotlin/dev/gitlive/firebase/storage/storage.kt

@@ -8,6 +8,7 @@ package dev.gitlive.firebase.storage
 import android.net.Uri
 import com.google.android.gms.tasks.OnCanceledListener
 import com.google.android.gms.tasks.OnCompleteListener
+import com.google.android.gms.tasks.Task
 import com.google.firebase.storage.OnPausedListener
 import com.google.firebase.storage.OnProgressListener
 import com.google.firebase.storage.StorageMetadata
@@ -58,6 +59,8 @@ actual class StorageReference(val android: com.google.firebase.storage.StorageRe
     actual val root: StorageReference get() = StorageReference(android.root)
     actual val storage: FirebaseStorage get() = FirebaseStorage(android.storage)
 
+    actual suspend fun getMetadata(): FirebaseStorageMetadata? = android.metadata.await().toFirebaseStorageMetadata()
+
     actual fun child(path: String): StorageReference = StorageReference(android.child(path))
 
     actual suspend fun delete() = android.delete().await().run { Unit }
@@ -117,7 +120,6 @@ actual class File(val uri: Uri)
 
 actual typealias FirebaseStorageException = com.google.firebase.storage.StorageException
 
-
 fun FirebaseStorageMetadata.toStorageMetadata(): StorageMetadata {
     return StorageMetadata.Builder()
         .setCacheControl(this.cacheControl)
@@ -130,4 +132,19 @@ fun FirebaseStorageMetadata.toStorageMetadata(): StorageMetadata {
                 (key, value) -> setCustomMetadata(key, value)
             }
         }.build()
+}
+
+fun StorageMetadata.toFirebaseStorageMetadata(): FirebaseStorageMetadata {
+    val sdkMetadata = this
+    return storageMetadata {
+        md5Hash = sdkMetadata.md5Hash
+        cacheControl = sdkMetadata.cacheControl
+        contentDisposition = sdkMetadata.contentDisposition
+        contentEncoding = sdkMetadata.contentEncoding
+        contentLanguage = sdkMetadata.contentLanguage
+        contentType = sdkMetadata.contentType
+        sdkMetadata.customMetadataKeys.forEach {
+            setCustomMetadata(it, sdkMetadata.getCustomMetadata(it))
+        }
+    }
 }

firebase-storage/src/commonMain/kotlin/dev/gitlive/firebase/storage/storage.kt

@@ -32,6 +32,8 @@ expect class StorageReference {
     val root: StorageReference
     val storage: FirebaseStorage
 
+    suspend fun getMetadata(): FirebaseStorageMetadata?
+
     fun child(path: String): StorageReference
 
     suspend fun delete()

firebase-storage/src/iosMain/kotlin/dev/gitlive/firebase/storage/storage.kt

@@ -65,6 +65,16 @@ actual class StorageReference(val ios: FIRStorageReference) {
 
     actual fun child(path: String): StorageReference = StorageReference(ios.child(path))
 
+    actual suspend fun getMetadata(): FirebaseStorageMetadata? = ios.awaitResult {
+        metadataWithCompletion { metadata, error ->
+            if (error == null) {
+                it.invoke(metadata?.toFirebaseStorageMetadata(), null)
+            } else {
+                it.invoke(null, error)
+            }
+        }
+    }
+
     actual suspend fun delete() = await { ios.deleteWithCompletion(it) }
 
     actual suspend fun getDownloadUrl(): String = ios.awaitResult {
@@ -161,4 +171,19 @@ fun FirebaseStorageMetadata.toFIRMetadata(): FIRStorageMetadata {
     metadata.setContentLanguage(this.contentLanguage)
     metadata.setContentType(this.contentType)
     return metadata
+}
+
+fun FIRStorageMetadata.toFirebaseStorageMetadata(): FirebaseStorageMetadata {
+    val sdkMetadata = this
+    return storageMetadata {
+        md5Hash = sdkMetadata.md5Hash()
+        cacheControl = sdkMetadata.cacheControl()
+        contentDisposition = sdkMetadata.contentDisposition()
+        contentEncoding = sdkMetadata.contentEncoding()
+        contentLanguage = sdkMetadata.contentLanguage()
+        contentType = sdkMetadata.contentType()
+        sdkMetadata.customMetadata()?.forEach {
+            setCustomMetadata(it.key.toString(), it.value.toString())
+        }
+    }
 }

firebase-storage/src/jsMain/kotlin/dev/gitlive/firebase/storage/externals/storage.kt

@@ -4,7 +4,6 @@
 package dev.gitlive.firebase.storage.externals
 
 import dev.gitlive.firebase.externals.FirebaseApp
-import dev.gitlive.firebase.storage.FirebaseStorageMetadata
 import kotlin.js.Promise
 
 external fun getStorage(app: FirebaseApp? = definedExternally): FirebaseStorage
@@ -14,9 +13,11 @@ external fun ref(ref: StorageReference, url: String? = definedExternally): Stora
 
 external fun getDownloadURL(ref: StorageReference): Promise<String>
 
-external fun uploadBytes(ref: StorageReference, file: dynamic, metadata: FirebaseStorageMetadata?): Promise<Unit>
+external fun getMetadata(ref: StorageReference): Promise<StorageMetadata>
 
-external fun uploadBytesResumable(ref: StorageReference, data: dynamic, metadata: FirebaseStorageMetadata?): UploadTask
+external fun uploadBytes(ref: StorageReference, file: dynamic, metadata: StorageMetadata?): Promise<Unit>
+
+external fun uploadBytesResumable(ref: StorageReference, data: dynamic, metadata: StorageMetadata?): UploadTask
 
 external fun deleteObject(ref: StorageReference): Promise<Unit>;
 
@@ -59,6 +60,25 @@ external interface UploadTaskSnapshot {
     val totalBytes: Number
 }
 
+external class StorageMetadata {
+    val bucket: String?
+    var cacheControl: String?
+    var contentDisposition: String?
+    var contentEncoding: String?
+    var contentLanguage: String?
+    var contentType: String?
+    var customMetadata: Map<String, String>?
+    val fullPath: String?
+    val generation: String?
+    val md5Hash: String?
+    val metageneration: String?
+    val name: String?
+    val size: Number?
+    val timeCreated: String?
+    val updated: String?
+
+}
+
 external class UploadTask : Promise<UploadTaskSnapshot> {
     fun cancel(): Boolean;
     fun on(event: String, next: (snapshot: UploadTaskSnapshot) -> Unit, error: (a: StorageError) -> Unit, complete: () -> Unit): () -> Unit

firebase-storage/src/jsMain/kotlin/dev/gitlive/firebase/storage/storage.kt

@@ -51,6 +51,8 @@ actual class StorageReference(val js: dev.gitlive.firebase.storage.externals.Sto
     actual val root: StorageReference get() = StorageReference(js.root)
     actual val storage: FirebaseStorage get() = FirebaseStorage(js.storage)
 
+    actual suspend fun getMetadata(): FirebaseStorageMetadata? = rethrow { getMetadata(js).await().toFirebaseStorageMetadata() }
+
     actual fun child(path: String): StorageReference = StorageReference(ref(js, path))
 
     actual suspend fun delete() = rethrow { deleteObject(js).await() }
@@ -59,10 +61,10 @@ actual class StorageReference(val js: dev.gitlive.firebase.storage.externals.Sto
 
     actual suspend fun listAll(): ListResult = rethrow { ListResult(listAll(js).await()) }
 
-    actual suspend fun putFile(file: File, metadata: FirebaseStorageMetadata?): Unit = rethrow { uploadBytes(js, file, metadata).await() }
+    actual suspend fun putFile(file: File, metadata: FirebaseStorageMetadata?): Unit = rethrow { uploadBytes(js, file, metadata?.toStorageMetadata()).await() }
 
     actual fun putFileResumable(file: File, metadata: FirebaseStorageMetadata?): ProgressFlow = rethrow {
-        val uploadTask = uploadBytesResumable(js, file, metadata)
+        val uploadTask = uploadBytesResumable(js, file, metadata?.toStorageMetadata())
 
         val flow = callbackFlow {
             val unsubscribe = uploadTask.on(
@@ -123,4 +125,31 @@ internal fun errorToException(error: dynamic) = (error?.code ?: error?.message ?
                 FirebaseStorageException(code, error)
             }
         }
-    }
+    }
+
+
+fun StorageMetadata.toFirebaseStorageMetadata(): FirebaseStorageMetadata {
+    val sdkMetadata = this
+    return storageMetadata {
+        md5Hash = sdkMetadata.md5Hash
+        cacheControl = sdkMetadata.cacheControl
+        contentDisposition = sdkMetadata.contentDisposition
+        contentEncoding = sdkMetadata.contentEncoding
+        contentLanguage = sdkMetadata.contentLanguage
+        contentType = sdkMetadata.contentType
+        sdkMetadata.customMetadata?.entries?.forEach {
+            setCustomMetadata(it.key, it.value)
+        }
+    }
+}
+
+fun FirebaseStorageMetadata.toStorageMetadata(): StorageMetadata {
+    val metadata = StorageMetadata()
+    metadata.cacheControl = cacheControl
+    metadata.contentDisposition = contentDisposition
+    metadata.contentEncoding = contentEncoding
+    metadata.contentLanguage = contentLanguage
+    metadata.contentType = contentType
+    metadata.customMetadata = customMetadata
+    return metadata
+}

firebase-storage/src/jvmMain/kotlin/dev/gitlive/firebase/storage/storage.jvm.kt

@@ -51,6 +51,10 @@ actual class StorageReference {
     actual val storage: FirebaseStorage
         get() = TODO("Not yet implemented")
 
+    actual suspend fun getMetadata(): FirebaseStorageMetadata? {
+        TODO("Not yet implemented")
+    }
+
     actual fun child(path: String): StorageReference {
         TODO("Not yet implemented")
     }