From 8d8dc0c473113bfeb0dc545f476ff70470fca7f7 Mon Sep 17 00:00:00 2001
From: Rusted Moon <rustedmoon@proton.me>
Date: Thu, 1 Feb 2024 16:56:14 +0100
Subject: [PATCH] js(nostr): add `EventBuilder::file_metadata`

---
 bindings/nostr-js/src/event/builder.rs |   8 ++
 bindings/nostr-js/src/nips/mod.rs      |   1 +
 bindings/nostr-js/src/nips/nip94.rs    | 108 +++++++++++++++++++++++++
 3 files changed, 117 insertions(+)
 create mode 100644 bindings/nostr-js/src/nips/nip94.rs

diff --git a/bindings/nostr-js/src/event/builder.rs b/bindings/nostr-js/src/event/builder.rs
index 9dd161bee..7d3242eaa 100644
--- a/bindings/nostr-js/src/event/builder.rs
+++ b/bindings/nostr-js/src/event/builder.rs
@@ -14,6 +14,7 @@ use crate::key::{JsKeys, JsPublicKey};
 use crate::nips::nip57::JsZapRequestData;
 use crate::nips::nip65::JsRelayListItem;
 use crate::nips::nip90::JsDataVendingMachineStatus;
+use crate::nips::nip94::JsFileMetadata;
 use crate::types::{JsContact, JsMetadata};
 
 #[wasm_bindgen(js_name = EventBuilder)]
@@ -323,4 +324,11 @@ impl JsEventBuilder {
             ),
         }
     }
+
+    #[wasm_bindgen(js_name = fileMetadata)]
+    pub fn file_metadata(description: String, metadata: JsFileMetadata) -> Self {
+        Self {
+            builder: EventBuilder::file_metadata(description, metadata.deref().clone()),
+        }
+    }
 }
diff --git a/bindings/nostr-js/src/nips/mod.rs b/bindings/nostr-js/src/nips/mod.rs
index 681c61689..e0e8631ff 100644
--- a/bindings/nostr-js/src/nips/mod.rs
+++ b/bindings/nostr-js/src/nips/mod.rs
@@ -15,3 +15,4 @@ pub mod nip47;
 pub mod nip57;
 pub mod nip65;
 pub mod nip90;
+pub mod nip94;
diff --git a/bindings/nostr-js/src/nips/nip94.rs b/bindings/nostr-js/src/nips/nip94.rs
new file mode 100644
index 000000000..4cd9dc4da
--- /dev/null
+++ b/bindings/nostr-js/src/nips/nip94.rs
@@ -0,0 +1,108 @@
+// Copyright (c) 2023-2024 Rust Nostr Developers
+// Distributed under the MIT software license
+
+use std::{ops::Deref, str::FromStr};
+
+use nostr::hashes::sha256::Hash as Sha256Hash;
+use nostr::Url;
+use nostr::nips::nip94::FileMetadata;
+use wasm_bindgen::prelude::*;
+
+use crate::error::{into_err, Result};
+use crate::event::tag::JsImageDimensions;
+
+#[wasm_bindgen(js_name = Aes256Gcm)]
+pub struct JsAes256Gcm {
+    key: String,
+    iv: String,
+}
+
+impl From<JsAes256Gcm> for (String, String) {
+    fn from(value: JsAes256Gcm) -> Self {
+        (value.key, value.iv)
+    }
+}
+
+impl From<(String, String)> for JsAes256Gcm {
+    fn from(value: (String, String)) -> Self {
+        Self { key: value.0, iv: value.1 }
+    }
+}
+
+impl JsAes256Gcm {
+    pub fn new(key: String, iv: String) -> Self {
+        Self { key, iv }
+    }
+}
+
+#[wasm_bindgen(js_name = FileMetadata)]
+pub struct JsFileMetadata {
+    inner: FileMetadata,
+}
+
+impl From<FileMetadata> for JsFileMetadata {
+    fn from(inner: FileMetadata) -> Self {
+        Self { inner }
+    }
+}
+
+impl Deref for JsFileMetadata {
+    type Target = FileMetadata;
+
+    fn deref(&self) -> &Self::Target {
+        &self.inner
+    }
+}
+
+#[wasm_bindgen(js_class = FileMetadata)]
+impl JsFileMetadata {
+    pub fn new(url: &str, mime_type: String, hash: &str) -> Result<JsFileMetadata> {
+        Ok(Self{
+            inner: FileMetadata::new(
+                Url::from_str(&url).map_err(into_err)?, 
+                mime_type, 
+                Sha256Hash::from_str(&hash).map_err(into_err)?,
+            ),
+        })
+    }
+
+    #[wasm_bindgen(getter)]
+    pub fn urls(&self) -> String {
+        self.inner.url.to_string()
+    }
+
+    #[wasm_bindgen(getter, js_name = mimeType)]
+    pub fn mime_type(&self) -> String {
+        self.inner.mime_type.clone()
+    }
+
+    #[wasm_bindgen(getter)]
+    pub fn hash(&self) -> String {
+        self.inner.hash.to_string()
+    }
+
+    #[wasm_bindgen(getter, js_name = aes256Gcm)]
+    pub fn aes_256_gcm(&self) -> Option<JsAes256Gcm> {
+        self.inner.aes_256_gcm.clone().map(|t| t.into())
+    }
+
+    #[wasm_bindgen(getter)]
+    pub fn size(&self) -> Option<f64> {
+        self.inner.size.map(|n| n as f64)
+    }
+
+    #[wasm_bindgen(getter)]
+    pub fn dim(&self) -> Option<JsImageDimensions> {
+        self.inner.dim.map(|i| i.into())
+    }
+
+    #[wasm_bindgen(getter)]
+    pub fn magnet(&self) -> Option<String> {
+        self.inner.magnet.clone()
+    }
+
+    #[wasm_bindgen(getter)]
+    pub fn blurhash(&self) -> Option<String> {
+        self.inner.blurhash.clone()
+    }
+}