task-073

Co-authored-by: Joe Carstairs <jcarstairs@scottlogic.com>
Reviewed-on: https://git.joeac.net/joeac/schist/pulls/1
Co-authored-by: Joe Carstairs <me@joeac.net>
Co-committed-by: Joe Carstairs <me@joeac.net>

4 files changed, 295 insertions, 0 deletions

diff --git a/schist_desktop_gui/src/gui/components/balances_view/make_balances_view_greeting.rs b/schist_desktop_gui/src/gui/components/balances_view/make_balances_view_greeting.rs
new file mode 100644
index 0000000..4926046
--- /dev/null
+++ b/schist_desktop_gui/src/gui/components/balances_view/make_balances_view_greeting.rs
@@ -0,0 +1,9 @@
+use crate::gui::components::text::Text;
+
+pub fn make_balances_view_greeting(group_name: Option<Text>) -> String {
+    if let Some(group_name) = group_name {
+        format!("Hello, {} balances!", group_name.content)
+    } else {
+        String::from("Hello, balances!")
+    }
+}
diff --git a/schist_desktop_gui/src/gui/components/balances_view/update_balances_view.rs b/schist_desktop_gui/src/gui/components/balances_view/update_balances_view.rs
new file mode 100644
index 0000000..100cbc9
--- /dev/null
+++ b/schist_desktop_gui/src/gui/components/balances_view/update_balances_view.rs
@@ -0,0 +1,121 @@
+use super::{
+    make_balances_view_greeting::make_balances_view_greeting, view_group_names::view_group_names,
+    Action, BalancesView, Message,
+};
+use crate::{
+    gui::components::{navigation, Text},
+    traits::Component,
+};
+
+pub fn update_balances_view(balances_view: &mut BalancesView, message: Message) -> Action {
+    match message {
+        Message::NavigationMessage(message) => update_navigation(balances_view, message),
+        Message::SetBuckets(buckets) => set_buckets(balances_view, buckets),
+        Message::SelectNextBucket => select_next_bucket(balances_view),
+        Message::SelectPrevBucket => select_prev_bucket(balances_view),
+    }
+}
+
+fn select_prev_bucket(balances_view: &mut BalancesView) -> Action {
+    match balances_view
+        .navigation
+        .update(navigation::Message::SelectPrev)
+    {
+        navigation::Action::SelectOption(option) => {
+            balances_view.greeting = make_balances_view_greeting(Some(option));
+            Action::None
+        }
+        navigation::Action::None => Action::None,
+    }
+}
+
+fn select_next_bucket(balances_view: &mut BalancesView) -> Action {
+    match balances_view
+        .navigation
+        .update(navigation::Message::SelectNext)
+    {
+        navigation::Action::SelectOption(option) => {
+            balances_view.greeting = make_balances_view_greeting(Some(option));
+            Action::None
+        }
+        navigation::Action::None => Action::None,
+    }
+}
+
+fn set_buckets(
+    balances_view: &mut BalancesView,
+    buckets: Vec<schist_models::bucket::Bucket>,
+) -> Action {
+    balances_view.buckets = buckets.clone();
+    match balances_view
+        .navigation
+        .update(navigation::Message::SetOptions(view_group_names(buckets)))
+    {
+        navigation::Action::SelectOption(option) => {
+            balances_view.greeting = make_balances_view_greeting(Some(option));
+            Action::None
+        }
+        navigation::Action::None => Action::None,
+    }
+}
+
+fn update_navigation(
+    balances_view: &mut BalancesView,
+    message: navigation::Message<Text>,
+) -> Action {
+    match balances_view.navigation.update(message) {
+        navigation::Action::SelectOption(group_name) => {
+            balances_view.greeting = make_balances_view_greeting(Some(group_name));
+            Action::None
+        }
+        navigation::Action::None => Action::None,
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use schist_fakes::bucket::make_fake_bucket_builder;
+
+    use crate::{
+        gui::components::{
+            balances_view::{BalancesView, Message},
+            navigation,
+        },
+        traits::Component,
+    };
+
+    #[test]
+    fn update_navigation_updates_greeting() {
+        let groceries = make_fake_bucket_builder(0)
+            .group(String::from("normal expenses"))
+            .build()
+            .unwrap();
+        let fragrance = make_fake_bucket_builder(1)
+            .group(String::from("luxuries"))
+            .build()
+            .unwrap();
+        let maps = make_fake_bucket_builder(2)
+            .group(String::from("outdoors"))
+            .build()
+            .unwrap();
+        let buckets = vec![groceries, fragrance.clone(), maps];
+
+        let mut balances_view = BalancesView::new(buckets);
+        assert_eq!("Hello, normal expenses balances!", balances_view.greeting);
+
+        balances_view.update(Message::NavigationMessage(navigation::Message::SelectPrev));
+        assert_eq!("Hello, normal expenses balances!", balances_view.greeting);
+
+        balances_view.update(Message::NavigationMessage(navigation::Message::SelectPrev));
+        assert_eq!("Hello, normal expenses balances!", balances_view.greeting);
+
+        balances_view.update(Message::NavigationMessage(navigation::Message::SelectNext));
+        assert_eq!("Hello, luxuries balances!", balances_view.greeting);
+
+        balances_view.update(Message::NavigationMessage(navigation::Message::SelectNext));
+        assert_eq!("Hello, outdoors balances!", balances_view.greeting);
+
+        balances_view.update(Message::NavigationMessage(navigation::Message::SelectNext));
+        assert_eq!("Hello, outdoors balances!", balances_view.greeting);
+    }
+}
diff --git a/schist_desktop_gui/src/gui/components/balances_view/view_balances_view.rs b/schist_desktop_gui/src/gui/components/balances_view/view_balances_view.rs
new file mode 100644
index 0000000..e8a1e46
--- /dev/null
+++ b/schist_desktop_gui/src/gui/components/balances_view/view_balances_view.rs
@@ -0,0 +1,22 @@
+use iced::widget::{column, row, Container};
+use iced::{alignment, Element, Length};
+
+use crate::gui::components::{balances_view::Message, BalancesView};
+use crate::style::SPACING_LG;
+use crate::traits::Viewable;
+
+pub fn view_balances_view<'a>(balances_view: &'a BalancesView) -> Element<'a, Message> {
+    let navigation = balances_view
+        .navigation
+        .view()
+        .map(Message::NavigationMessage);
+    let main_content = column![iced::widget::text(balances_view.greeting.clone())];
+    row![
+        Container::new(navigation).width(Length::FillPortion(1)),
+        Container::new(main_content).width(Length::FillPortion(3)),
+    ]
+    .align_y(alignment::Vertical::Center)
+    .height(Length::Fill)
+    .spacing(SPACING_LG)
+    .into()
+}
diff --git a/schist_desktop_gui/src/gui/components/balances_view/view_group_names.rs b/schist_desktop_gui/src/gui/components/balances_view/view_group_names.rs
new file mode 100644
index 0000000..02900e9
--- /dev/null
+++ b/schist_desktop_gui/src/gui/components/balances_view/view_group_names.rs
@@ -0,0 +1,143 @@
+use itertools::Itertools;
+use schist_models::bucket::Bucket;
+
+use crate::gui::components::Text;
+
+pub fn view_group_names(buckets: Vec<Bucket>) -> Vec<Text> {
+    buckets
+        .iter()
+        .map(|b| b.group.clone())
+        .unique()
+        .map(Text::new)
+        .collect()
+}
+
+#[cfg(test)]
+mod test {
+    use schist_fakes::bucket::make_fake_bucket_builder;
+
+    use crate::gui::components::{balances_view::view_group_names::view_group_names, text::Text};
+
+    #[test]
+    fn preserves_order() {
+        let buckets = vec![
+            make_fake_bucket_builder(0)
+                .group(String::from("hydrogen"))
+                .build()
+                .unwrap(),
+            make_fake_bucket_builder(1)
+                .group(String::from("helium"))
+                .build()
+                .unwrap(),
+            make_fake_bucket_builder(2)
+                .group(String::from("lithium"))
+                .build()
+                .unwrap(),
+            make_fake_bucket_builder(3)
+                .group(String::from("beryllium"))
+                .build()
+                .unwrap(),
+            make_fake_bucket_builder(4)
+                .group(String::from("boron"))
+                .build()
+                .unwrap(),
+            make_fake_bucket_builder(5)
+                .group(String::from("carbon"))
+                .build()
+                .unwrap(),
+            make_fake_bucket_builder(6)
+                .group(String::from("nitrogen"))
+                .build()
+                .unwrap(),
+            make_fake_bucket_builder(7)
+                .group(String::from("oxygen"))
+                .build()
+                .unwrap(),
+            make_fake_bucket_builder(8)
+                .group(String::from("flourine"))
+                .build()
+                .unwrap(),
+            make_fake_bucket_builder(8)
+                .group(String::from("flourine"))
+                .build()
+                .unwrap(),
+            make_fake_bucket_builder(8)
+                .group(String::from("neon"))
+                .build()
+                .unwrap(),
+            make_fake_bucket_builder(8)
+                .group(String::from("magnesium"))
+                .build()
+                .unwrap(),
+            make_fake_bucket_builder(8)
+                .group(String::from("aluminium"))
+                .build()
+                .unwrap(),
+            make_fake_bucket_builder(8)
+                .group(String::from("silicon"))
+                .build()
+                .unwrap(),
+            make_fake_bucket_builder(8)
+                .group(String::from("phosphorus"))
+                .build()
+                .unwrap(),
+            make_fake_bucket_builder(8)
+                .group(String::from("sulphur"))
+                .build()
+                .unwrap(),
+            make_fake_bucket_builder(8)
+                .group(String::from("chlorine"))
+                .build()
+                .unwrap(),
+            make_fake_bucket_builder(8)
+                .group(String::from("argon"))
+                .build()
+                .unwrap(),
+        ];
+        let group_names = view_group_names(buckets);
+        assert_eq!(17, group_names.len());
+        assert_eq!(group_names[0], Text::new(String::from("hydrogen")));
+        assert_eq!(group_names[1], Text::new(String::from("helium")));
+        assert_eq!(group_names[2], Text::new(String::from("lithium")));
+        assert_eq!(group_names[3], Text::new(String::from("beryllium")));
+        assert_eq!(group_names[4], Text::new(String::from("boron")));
+        assert_eq!(group_names[5], Text::new(String::from("carbon")));
+        assert_eq!(group_names[6], Text::new(String::from("nitrogen")));
+        assert_eq!(group_names[7], Text::new(String::from("oxygen")));
+        assert_eq!(group_names[8], Text::new(String::from("flourine")));
+        assert_eq!(group_names[9], Text::new(String::from("neon")));
+        assert_eq!(group_names[10], Text::new(String::from("magnesium")));
+        assert_eq!(group_names[11], Text::new(String::from("aluminium")));
+        assert_eq!(group_names[12], Text::new(String::from("silicon")));
+        assert_eq!(group_names[13], Text::new(String::from("phosphorus")));
+        assert_eq!(group_names[14], Text::new(String::from("sulphur")));
+        assert_eq!(group_names[15], Text::new(String::from("chlorine")));
+        assert_eq!(group_names[16], Text::new(String::from("argon")));
+    }
+
+    #[test]
+    fn removes_duplicates() {
+        let buckets = vec![
+            make_fake_bucket_builder(0)
+                .group(String::from("hydrogen"))
+                .build()
+                .unwrap(),
+            make_fake_bucket_builder(1)
+                .group(String::from("helium"))
+                .build()
+                .unwrap(),
+            make_fake_bucket_builder(2)
+                .group(String::from("hydrogen"))
+                .build()
+                .unwrap(),
+        ];
+        let group_names = view_group_names(buckets);
+        assert_eq!(
+            vec![
+                Text::new(String::from("hydrogen")),
+                Text::new(String::from("helium")),
+            ],
+            group_names
+        );
+    }
+}