Upgrade to Tauri v2 (#693)

Co-authored-by: Thorsten Sommer <SommerEngineering@users.noreply.github.com>

runtime/src/file_actions.rs

@@ -0,0 +1,298 @@
+use log::{error, info};
+use rocket::post;
+use rocket::serde::{Deserialize, Serialize};
+use rocket::serde::json::Json;
+use tauri_plugin_dialog::{DialogExt, FileDialogBuilder};
+use crate::api_token::APIToken;
+use crate::app_window::MAIN_WINDOW;
+
+#[derive(Clone, Deserialize)]
+pub struct PreviousDirectory {
+    path: String,
+}
+
+#[derive(Clone, Deserialize)]
+pub struct FileTypeFilter {
+    filter_name: String,
+    filter_extensions: Vec<String>,
+}
+
+#[derive(Clone, Deserialize)]
+pub struct SelectFileOptions {
+    title: String,
+    previous_file: Option<PreviousFile>,
+    filter: Option<FileTypeFilter>,
+}
+
+#[derive(Clone, Deserialize)]
+pub struct SaveFileOptions {
+    title: String,
+    name_file: Option<PreviousFile>,
+    filter: Option<FileTypeFilter>,
+}
+
+#[derive(Serialize)]
+pub struct DirectorySelectionResponse {
+    user_cancelled: bool,
+    selected_directory: String,
+}
+
+#[derive(Serialize)]
+pub struct FileSelectionResponse {
+    user_cancelled: bool,
+    selected_file_path: String,
+}
+
+#[derive(Serialize)]
+pub struct FilesSelectionResponse {
+    user_cancelled: bool,
+    selected_file_paths: Vec<String>,
+}
+
+#[derive(Serialize)]
+pub struct FileSaveResponse {
+    user_cancelled: bool,
+    save_file_path: String,
+}
+
+#[derive(Clone, Deserialize)]
+pub struct PreviousFile {
+    file_path: String,
+}
+
+/// Let the user select a directory.
+#[post("/select/directory?<title>", data = "<previous_directory>")]
+pub fn select_directory(
+    _token: APIToken,
+    title: &str,
+    previous_directory: Option<Json<PreviousDirectory>>,
+) -> Json<DirectorySelectionResponse> {
+    let main_window_lock = MAIN_WINDOW.lock().unwrap();
+    let main_window = match main_window_lock.as_ref() {
+        Some(window) => window,
+        None => {
+            error!(Source = "Tauri"; "Cannot open directory dialog: main window not available.");
+            return Json(DirectorySelectionResponse {
+                user_cancelled: true,
+                selected_directory: String::from(""),
+            });
+        }
+    };
+
+    let mut dialog = main_window.dialog().file().set_parent(main_window).set_title(title);
+    if let Some(previous) = previous_directory {
+        dialog = dialog.set_directory(previous.path.clone());
+    }
+
+    drop(main_window_lock);
+
+    let folder_path = dialog.blocking_pick_folder();
+    match folder_path {
+        Some(path) => {
+            match path.into_path() {
+                Ok(pb) => {
+                    info!("User selected directory: {pb:?}");
+                    Json(DirectorySelectionResponse {
+                        user_cancelled: false,
+                        selected_directory: pb.to_string_lossy().to_string(),
+                    })
+                }
+                Err(e) => {
+                    error!(Source = "Tauri"; "Failed to convert directory path: {e}");
+                    Json(DirectorySelectionResponse {
+                        user_cancelled: true,
+                        selected_directory: String::new(),
+                    })
+                }
+            }
+        },
+
+        None => {
+            info!("User cancelled directory selection.");
+            Json(DirectorySelectionResponse {
+                user_cancelled: true,
+                selected_directory: String::from(""),
+            })
+        },
+    }
+}
+
+/// Let the user select a file.
+#[post("/select/file", data = "<payload>")]
+pub fn select_file(
+    _token: APIToken,
+    payload: Json<SelectFileOptions>,
+) -> Json<FileSelectionResponse> {
+    // Create a new file dialog builder:
+    let file_dialog = MAIN_WINDOW
+        .lock()
+        .unwrap()
+        .as_ref()
+        .map(|w| w.dialog().file().set_parent(w).set_title(&payload.title));
+
+    let Some(mut file_dialog) = file_dialog else {
+        error!(Source = "Tauri"; "Cannot open file dialog: main window not available.");
+        return Json(FileSelectionResponse {
+            user_cancelled: true,
+            selected_file_path: String::from(""),
+        });
+    };
+
+    // Set the file type filter if provided:
+    file_dialog = apply_filter(file_dialog, &payload.filter);
+
+    // Set the previous file path if provided:
+    if let Some(previous) = &payload.previous_file {
+        let previous_path = previous.file_path.as_str();
+        file_dialog = file_dialog.set_directory(previous_path);
+    }
+
+    // Show the file dialog and get the selected file path:
+    let file_path = file_dialog.blocking_pick_file();
+    match file_path {
+        Some(path) => match path.into_path() {
+            Ok(pb) => {
+                info!("User selected file: {pb:?}");
+                Json(FileSelectionResponse {
+                    user_cancelled: false,
+                    selected_file_path: pb.to_string_lossy().to_string(),
+                })
+            }
+            Err(e) => {
+                error!(Source = "Tauri"; "Failed to convert file path: {e}");
+                Json(FileSelectionResponse {
+                    user_cancelled: true,
+                    selected_file_path: String::new(),
+                })
+            }
+        },
+
+        None => {
+            info!("User cancelled file selection.");
+            Json(FileSelectionResponse {
+                user_cancelled: true,
+                selected_file_path: String::from(""),
+            })
+        },
+    }
+}
+
+/// Let the user select some files.
+#[post("/select/files", data = "<payload>")]
+pub fn select_files(
+    _token: APIToken,
+    payload: Json<SelectFileOptions>,
+) -> Json<FilesSelectionResponse> {
+    // Create a new file dialog builder:
+    let file_dialog = MAIN_WINDOW
+        .lock()
+        .unwrap()
+        .as_ref()
+        .map(|w| w.dialog().file().set_parent(w).set_title(&payload.title));
+
+    let Some(mut file_dialog) = file_dialog else {
+        error!(Source = "Tauri"; "Cannot open file dialog: main window not available.");
+        return Json(FilesSelectionResponse {
+            user_cancelled: true,
+            selected_file_paths: Vec::new(),
+        });
+    };
+
+    // Set the file type filter if provided:
+    file_dialog = apply_filter(file_dialog, &payload.filter);
+
+    // Set the previous file path if provided:
+    if let Some(previous) = &payload.previous_file {
+        let previous_path = previous.file_path.as_str();
+        file_dialog = file_dialog.set_directory(previous_path);
+    }
+
+    // Show the file dialog and get the selected file path:
+    let file_paths = file_dialog.blocking_pick_files();
+    match file_paths {
+        Some(paths) => {
+            let converted: Vec<String> = paths.into_iter().filter_map(|p| p.into_path().ok()).map(|pb| pb.to_string_lossy().to_string()).collect();
+            info!("User selected {} files.", converted.len());
+            Json(FilesSelectionResponse {
+                user_cancelled: false,
+                selected_file_paths: converted,
+            })
+        }
+
+        None => {
+            info!("User cancelled file selection.");
+            Json(FilesSelectionResponse {
+                user_cancelled: true,
+                selected_file_paths: Vec::new(),
+            })
+        },
+    }
+}
+
+#[post("/save/file", data = "<payload>")]
+pub fn save_file(_token: APIToken, payload: Json<SaveFileOptions>) -> Json<FileSaveResponse> {
+    // Create a new file dialog builder:
+    let file_dialog = MAIN_WINDOW
+        .lock()
+        .unwrap()
+        .as_ref()
+        .map(|w| w.dialog().file().set_parent(w).set_title(&payload.title));
+
+    let Some(mut file_dialog) = file_dialog else {
+        error!(Source = "Tauri"; "Cannot open save dialog: main window not available.");
+        return Json(FileSaveResponse {
+            user_cancelled: true,
+            save_file_path: String::from(""),
+        });
+    };
+
+    // Set the file type filter if provided:
+    file_dialog = apply_filter(file_dialog, &payload.filter);
+
+    // Set the previous file path if provided:
+    if let Some(previous) = &payload.name_file {
+        let previous_path = previous.file_path.as_str();
+        file_dialog = file_dialog.set_directory(previous_path);
+    }
+
+    // Displays the file dialogue box and select the file:
+    let file_path = file_dialog.blocking_save_file();
+    match file_path {
+        Some(path) => match path.into_path() {
+            Ok(pb) => {
+                info!("User selected file for writing operation: {pb:?}");
+                Json(FileSaveResponse {
+                    user_cancelled: false,
+                    save_file_path: pb.to_string_lossy().to_string(),
+                })
+            }
+            Err(e) => {
+                error!(Source = "Tauri"; "Failed to convert save file path: {e}");
+                Json(FileSaveResponse {
+                    user_cancelled: true,
+                    save_file_path: String::new(),
+                })
+            }
+        },
+
+        None => {
+            info!("User cancelled file selection.");
+            Json(FileSaveResponse {
+                user_cancelled: true,
+                save_file_path: String::from(""),
+            })
+        },
+    }
+}
+
+/// Applies an optional file type filter to a FileDialogBuilder.
+fn apply_filter<R: tauri::Runtime>(file_dialog: FileDialogBuilder<R>, filter: &Option<FileTypeFilter>) -> FileDialogBuilder<R> {
+    match filter {
+        Some(f) => file_dialog.add_filter(
+            &f.filter_name,
+            &f.filter_extensions.iter().map(|s| s.as_str()).collect::<Vec<&str>>(),
+        ),
+
+        None => file_dialog,
+    }
+}