refactor: combine open and save dialogs

src/dialog/file_chooser/open.rs

@@ -0,0 +1,90 @@
+// Copyright 2023 System76 <info@system76.com>
+// SPDX-License-Identifier: MPL-2.0
+
+//! Request to open files and/or directories.
+//!
+//! Check out the [open-dialog](https://github.com/pop-os/libcosmic/tree/master/examples/open-dialog)
+//! example in our repository.
+
+use derive_setters::Setters;
+use iced::Command;
+
+/// A builder for an open file dialog, passed as a request by a [`Sender`]
+#[derive(Setters)]
+#[must_use]
+pub struct Dialog {
+    /// The label for the dialog's window title.
+    title: String,
+
+    /// The label for the accept button. Mnemonic underlines are allowed.
+    #[setters(strip_option)]
+    accept_label: Option<String>,
+
+    /// Whether to select for folders instead of files. Default is to select files.
+    include_directories: bool,
+
+    /// Modal dialogs require user input before continuing the program.
+    modal: bool,
+
+    /// Whether to allow selection of multiple files. Default is no.
+    multiple_files: bool,
+
+    /// Adds a list of choices.
+    choices: Vec<super::Choice>,
+
+    /// Specifies the default file filter.
+    #[setters(into)]
+    current_filter: Option<super::FileFilter>,
+
+    /// A collection of file filters.
+    filters: Vec<super::FileFilter>,
+}
+
+impl Dialog {
+    pub(super) const fn new() -> Self {
+        Self {
+            title: String::new(),
+            accept_label: None,
+            include_directories: false,
+            modal: true,
+            multiple_files: false,
+            current_filter: None,
+            choices: Vec::new(),
+            filters: Vec::new(),
+        }
+    }
+
+    /// Creates a [`Command`] which opens the dialog.
+    pub fn create(self, sender: &mut super::Sender) -> Command<()> {
+        sender.open(self)
+    }
+
+    /// Adds a choice.
+    pub fn choice(mut self, choice: impl Into<super::Choice>) -> Self {
+        self.choices.push(choice.into());
+        self
+    }
+
+    /// Adds a files filter.
+    pub fn filter(mut self, filter: impl Into<super::FileFilter>) -> Self {
+        self.filters.push(filter.into());
+        self
+    }
+}
+
+/// Creates a new file dialog, and begins to await its responses.
+pub(super) async fn create(
+    dialog: Dialog,
+) -> ashpd::Result<ashpd::desktop::Request<super::SelectedFiles>> {
+    ashpd::desktop::file_chooser::OpenFileRequest::default()
+        .title(Some(dialog.title.as_str()))
+        .accept_label(dialog.accept_label.as_deref())
+        .directory(dialog.include_directories)
+        .modal(dialog.modal)
+        .multiple(dialog.multiple_files)
+        .choices(dialog.choices)
+        .filters(dialog.filters)
+        .current_filter(dialog.current_filter)
+        .send()
+        .await
+}