task-072

Co-authored-by: Joe Carstairs <jcarstairs@scottlogic.com>
Reviewed-on: https://git.joeac.net/joeac/schist/pulls/3
Co-authored-by: Joe Carstairs <me@joeac.net>
Co-committed-by: Joe Carstairs <me@joeac.net>

5 files changed, 274 insertions, 7 deletions

diff --git a/schist_desktop_gui/src/gui/screens/files_screen.rs b/schist_desktop_gui/src/gui/screens/files_screen.rs
new file mode 100644
index 0000000..68a9556
--- /dev/null
+++ b/schist_desktop_gui/src/gui/screens/files_screen.rs
@@ -0,0 +1,36 @@
+mod update_files_screen;
+mod view_files_screen;
+
+use std::{fmt::Debug, path::PathBuf};
+
+use crate::DatabaseConnection;
+
+pub struct FilesScreen {
+    new_file_err: Option<(PathBuf, String)>,
+    file_paths: Vec<PathBuf>,
+    open_file_err: Option<(PathBuf, String)>,
+}
+
+#[derive(Clone, Debug)]
+pub enum Message {
+    ImportFromActualbudget,
+    NewFile,
+    OpenFile(std::path::PathBuf),
+    PickFile,
+}
+
+#[derive(Debug)]
+pub enum Action {
+    None,
+    OpenedFile(DatabaseConnection),
+}
+
+impl<'a> FilesScreen {
+    pub fn new(file_paths: &'a [PathBuf]) -> Self {
+        Self {
+            file_paths: file_paths.to_vec(),
+            new_file_err: None,
+            open_file_err: None,
+        }
+    }
+}
diff --git a/schist_desktop_gui/src/gui/screens/files_screen/update_files_screen.rs b/schist_desktop_gui/src/gui/screens/files_screen/update_files_screen.rs
new file mode 100644
index 0000000..9c45d6e
--- /dev/null
+++ b/schist_desktop_gui/src/gui/screens/files_screen/update_files_screen.rs
@@ -0,0 +1,125 @@
+use actualbudget_to_schist_transformer::schist_state::{export_schist_state, SchistState};
+use itertools::Itertools;
+
+use crate::{
+    database_connection::DatabaseConnectionResult,
+    dialog::{import_from_actualbudget_dialog, new_file_dialog, pick_file_dialog},
+    paths::get_schist_database_directory,
+    traits::Component,
+    DatabaseConnection,
+};
+
+use super::{Action, FilesScreen, Message};
+
+impl<'a> Component<'a, Message, Action> for FilesScreen {
+    fn update(&mut self, message: Message) -> Action {
+        match message {
+            Message::NewFile => match self.new_file() {
+                Some(Ok(file)) => Action::OpenedFile(file),
+                Some(Err(_)) | None => Action::None,
+            },
+
+            Message::OpenFile(file_path) => self
+                .open_file(file_path)
+                .map_or(Action::None, Action::OpenedFile),
+
+            Message::PickFile => match self.pick_file() {
+                Some(Ok(file)) => Action::OpenedFile(file),
+                Some(Err(_)) | None => Action::None,
+            },
+
+            Message::ImportFromActualbudget => match self.import_from_actualbudget() {
+                Some(Ok(file)) => Action::OpenedFile(file),
+                Some(Err(_)) | None => Action::None,
+            },
+        }
+    }
+}
+
+impl FilesScreen {
+    fn pick_file(
+        &mut self,
+    ) -> Option<Result<DatabaseConnection, (std::path::PathBuf, anyhow::Error)>> {
+        pick_file_dialog(get_schist_database_directory().ok()).map(|db_connection_result| {
+            db_connection_result.ok().inspect_err(|(path, err)| {
+                self.open_file_err = Some((path.clone(), err.to_string()));
+                rfd::MessageDialog::new()
+                    .set_title("Failed to import from Actualbudget")
+                    .set_level(rfd::MessageLevel::Error)
+                    .set_description(format!("{}", err.chain().join("\n | ")))
+                    .show();
+            })
+        })
+    }
+
+    fn open_file(
+        &mut self,
+        file_path: std::path::PathBuf,
+    ) -> Result<DatabaseConnection, (std::path::PathBuf, anyhow::Error)> {
+        DatabaseConnection::establish(file_path.clone())
+            .ok()
+            .inspect_err(|(_path, err)| {
+                self.open_file_err = Some((file_path, err.to_string()));
+                rfd::MessageDialog::new()
+                    .set_title("Failed to import from Actualbudget")
+                    .set_level(rfd::MessageLevel::Error)
+                    .set_description(format!("{}", err.chain().join("\n | ")))
+                    .show();
+            })
+    }
+
+    fn new_file(
+        &mut self,
+    ) -> Option<Result<DatabaseConnection, (std::path::PathBuf, anyhow::Error)>> {
+        new_file_dialog(get_schist_database_directory().ok()).map(|result| {
+            result.ok().inspect_err(|(path, err)| {
+                self.new_file_err = Some((path.clone(), err.to_string()));
+                rfd::MessageDialog::new()
+                    .set_title("Failed to import from Actualbudget")
+                    .set_level(rfd::MessageLevel::Error)
+                    .set_description(format!("{}", err.chain().join("\n | ")))
+                    .show();
+            })
+        })
+    }
+
+    fn import_from_actualbudget(&mut self) -> Option<anyhow::Result<DatabaseConnection>> {
+        match import_from_actualbudget_dialog() {
+            Some(Ok(state)) => self.new_file_with_state(&state),
+            Some(Err((path, err))) => Some({
+                self.open_file_err = Some((path, err.to_string()));
+                rfd::MessageDialog::new()
+                    .set_title("Failed to import from Actualbudget")
+                    .set_level(rfd::MessageLevel::Error)
+                    .set_description(format!("{}", err.chain().join("\n | ")))
+                    .show();
+                Err(err)
+            }),
+            None => None,
+        }
+    }
+
+    fn new_file_with_state(
+        &mut self,
+        state: &SchistState,
+    ) -> Option<anyhow::Result<DatabaseConnection>> {
+        match new_file_dialog(get_schist_database_directory().ok())
+            .map(DatabaseConnectionResult::ok)
+        {
+            Some(Ok(mut file)) => Some({
+                export_schist_state(state, &mut file.connection).ok()?;
+                Ok(file)
+            }),
+            Some(Err((path, err))) => Some({
+                self.new_file_err = Some((path, err.to_string()));
+                rfd::MessageDialog::new()
+                    .set_title("Failed to import from Actualbudget")
+                    .set_level(rfd::MessageLevel::Error)
+                    .set_description(format!("{}", err.chain().join("\n | ")))
+                    .show();
+                Err(err)
+            }),
+            None => None,
+        }
+    }
+}
diff --git a/schist_desktop_gui/src/gui/screens/files_screen/view_files_screen.rs b/schist_desktop_gui/src/gui/screens/files_screen/view_files_screen.rs
new file mode 100644
index 0000000..3cbd939
--- /dev/null
+++ b/schist_desktop_gui/src/gui/screens/files_screen/view_files_screen.rs
@@ -0,0 +1,106 @@
+use std::path::PathBuf;
+
+use iced::widget::column;
+
+use crate::{
+    gui::components::{panel_button, Text},
+    style::*,
+    traits::Viewable,
+};
+
+use super::{FilesScreen, Message};
+
+impl<'a> Viewable<'a, Message> for FilesScreen {
+    fn view(&'a self) -> iced::Element<'a, Message> {
+        let mut cols = Vec::new();
+        if let Some(col) = self.view_new_file_err() {
+            cols.push(col);
+        };
+        if let Some(col) = self.view_open_file_err() {
+            cols.push(col);
+        };
+        cols.push(self.view_new_file_button());
+        cols.push(self.view_open_file_button());
+        cols.push(self.view_import_from_actualbudget_button());
+        cols.append(&mut self.view_files());
+        column(cols).padding(SPACING_LG).spacing(SPACING_MD).into()
+    }
+}
+
+impl<'a> FilesScreen {
+    fn view_new_file_err(&'a self) -> Option<iced::Element<'a, Message>> {
+        self.new_file_err.as_ref().map(|(path, err)| {
+            let msg = format!("Failed to open new file {:#?}: {:#?}", path, err);
+            Text::new(&msg).danger().into()
+        })
+    }
+
+    fn view_open_file_err(&'a self) -> Option<iced::Element<'a, Message>> {
+        self.open_file_err
+            .as_ref()
+            .filter(|(file_path, _err)| !self.file_paths.iter().any(|fp| *fp == *file_path))
+            .map(|(file_path, err)| {
+                let msg = format!("Failed to open new file {:#?}: {:#?}", file_path, err);
+                Text::new(&msg).danger().into()
+            })
+    }
+
+    fn view_files(&'a self) -> Vec<iced::Element<'a, Message>> {
+        self.file_paths
+            .iter()
+            .map(|f| {
+                view_file(
+                    f,
+                    self.open_file_err
+                        .clone()
+                        .filter(|(file, _err)| *file == *f)
+                        .map(|(_file, err)| err),
+                )
+            })
+            .collect()
+    }
+
+    fn view_new_file_button(&'a self) -> iced::Element<'a, Message> {
+        panel_button::<Text, Message>(Text::default("New file").into(), Message::NewFile).into()
+    }
+
+    fn view_open_file_button(&'a self) -> iced::Element<'a, Message> {
+        panel_button::<Text, Message>(Text::default("Open file").into(), Message::PickFile).into()
+    }
+
+    fn view_import_from_actualbudget_button(&'a self) -> iced::Element<'a, Message> {
+        panel_button::<Text, Message>(
+            Text::default("Import from Actualbudget").into(),
+            Message::ImportFromActualbudget,
+        )
+        .into()
+    }
+}
+
+fn view_file<'a>(file_path: &'a PathBuf, err: Option<String>) -> iced::Element<'a, Message> {
+    let mut cols: Vec<iced::Element<'a, Message>> = err
+        .map(|err| {
+            let msg = format!("Failed to open new file {:#?}: {:#?}", file_path, err);
+            vec![Text::new(&msg).danger().small().into()]
+        })
+        .unwrap_or_else(Vec::new);
+
+    cols.push(
+        Text::default(file_path.to_str().unwrap_or(""))
+            .small()
+            .weak()
+            .into(),
+    );
+
+    cols.push(
+        Text::default(
+            file_path
+                .file_name()
+                .map(|os_str| os_str.to_str().unwrap_or("[invalid Unicode]"))
+                .unwrap_or("[invalid filename]"),
+        )
+        .into(),
+    );
+
+    panel_button(column(cols), Message::OpenFile(file_path.clone())).into()
+}
diff --git a/schist_desktop_gui/src/gui/screens/main_screen/main_screen.rs b/schist_desktop_gui/src/gui/screens/main_screen/main_screen.rs
index 0af3c28..00f4ec3 100644
--- a/schist_desktop_gui/src/gui/screens/main_screen/main_screen.rs
+++ b/schist_desktop_gui/src/gui/screens/main_screen/main_screen.rs
@@ -147,12 +147,12 @@ impl<'a> Component<'a, Message, Action> for MainScreen {
 }
 
 impl MainScreen {
-    pub fn new(buckets: Vec<Bucket>, accounts: Vec<Account>) -> Self {
+    pub fn new() -> Self {
         Self {
-            balances_view: BalancesView::new(buckets.clone()),
-            buckets: buckets.clone(),
-            buckets_view: BucketsView::new(buckets, "Hello, buckets!"),
-            transactions_view: TransactionsView::new(accounts, "Hello, transactions!"),
+            balances_view: BalancesView::new(Vec::new()),
+            buckets: Vec::new(),
+            buckets_view: BucketsView::new(Vec::new(), "Hello, buckets!"),
+            transactions_view: TransactionsView::new(Vec::new(), "Hello, transactions!"),
             active_view: View::Balances,
             view_navigation: Navigation::new(Some(View::Balances), View::views()),
         }
diff --git a/schist_desktop_gui/src/gui/screens/main_screen/view.rs b/schist_desktop_gui/src/gui/screens/main_screen/view.rs
index eb9c88e..2be427b 100644
--- a/schist_desktop_gui/src/gui/screens/main_screen/view.rs
+++ b/schist_desktop_gui/src/gui/screens/main_screen/view.rs
@@ -1,4 +1,4 @@
-use iced::Element;
+use iced::{widget::Text, Element};
 
 use crate::gui::components::navigation;
 
@@ -43,6 +43,6 @@ impl View {
 
 impl<'a> Into<Element<'a, navigation::Message<View>>> for View {
     fn into(self) -> Element<'a, navigation::Message<View>> {
-        iced::widget::text(self.name()).into()
+        Text::new(self.name()).into()
     }
 }