implement file events on desktop

packages/desktop/src/file_upload.rs

@@ -0,0 +1,74 @@
+use std::{path::PathBuf, str::FromStr};
+
+use serde::Deserialize;
+
+#[derive(Debug, Deserialize)]
+pub(crate) struct FileDiologRequest {
+    accept: String,
+    multiple: bool,
+    pub event: String,
+    pub target: usize,
+    pub bubbles: bool,
+}
+
+pub(crate) fn get_file_event(request: &FileDiologRequest) -> Vec<PathBuf> {
+    let mut dialog = rfd::FileDialog::new();
+
+    let filters: Vec<_> = request
+        .accept
+        .split(',')
+        .filter_map(|s| Filters::from_str(s).ok())
+        .collect();
+
+    let file_extensions: Vec<_> = filters
+        .iter()
+        .flat_map(|f| f.as_extensions().into_iter())
+        .collect();
+
+    dialog = dialog.add_filter("name", file_extensions.as_slice());
+
+    let files: Vec<_> = if request.multiple {
+        dialog.pick_files().into_iter().flatten().collect()
+    } else {
+        dialog.pick_file().into_iter().collect()
+    };
+
+    files
+}
+
+enum Filters {
+    Extension(String),
+    Mime(String),
+    Audio,
+    Video,
+    Image,
+}
+
+impl Filters {
+    fn as_extensions(&self) -> Vec<&str> {
+        match self {
+            Filters::Extension(extension) => vec![extension.as_str()],
+            Filters::Mime(_) => vec![],
+            Filters::Audio => vec!["mp3", "wav", "ogg"],
+            Filters::Video => vec!["mp4", "webm"],
+            Filters::Image => vec!["png", "jpg", "jpeg", "gif", "webp"],
+        }
+    }
+}
+
+impl FromStr for Filters {
+    type Err = String;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        if let Some(extension) = s.strip_prefix('.') {
+            Ok(Filters::Extension(extension.to_string()))
+        } else {
+            match s {
+                "audio/*" => Ok(Filters::Audio),
+                "video/*" => Ok(Filters::Video),
+                "image/*" => Ok(Filters::Image),
+                _ => Ok(Filters::Mime(s.to_string())),
+            }
+        }
+    }
+}