Refactored things a bit and added help text support

src/models/mod.rs

@@ -0,0 +1,209 @@
+use std::cell::RefCell;
+use std::fmt::{Display, Formatter};
+
+use serde::Deserialize;
+use tui::widgets::TableState;
+
+use crate::app::radarr::ActiveRadarrBlock;
+
+pub mod radarr_models;
+
+#[derive(Clone, PartialEq, Eq, Debug)]
+pub enum Route {
+  Radarr(ActiveRadarrBlock),
+  Sonarr,
+}
+
+pub trait Scrollable {
+  fn scroll_down(&mut self);
+  fn scroll_up(&mut self);
+}
+
+pub struct StatefulTable<T> {
+  pub state: TableState,
+  pub items: Vec<T>,
+}
+
+impl<T> Default for StatefulTable<T> {
+  fn default() -> StatefulTable<T> {
+    StatefulTable {
+      state: TableState::default(),
+      items: Vec::new(),
+    }
+  }
+}
+
+impl<T: Clone> StatefulTable<T> {
+  pub fn set_items(&mut self, items: Vec<T>) {
+    let items_len = items.len();
+    self.items = items;
+    if !self.items.is_empty() {
+      let selected_row = self.state.selected().map_or(0, |i| {
+        if i > 0 && i < items_len {
+          i
+        } else if i >= items_len {
+          items_len - 1
+        } else {
+          0
+        }
+      });
+      self.state.select(Some(selected_row));
+    }
+  }
+
+  pub fn current_selection(&self) -> &T {
+    &self.items[self.state.selected().unwrap_or(0)]
+  }
+
+  pub fn current_selection_clone(&self) -> T {
+    self.items[self.state.selected().unwrap_or(0)].clone()
+  }
+}
+
+impl<T> Scrollable for StatefulTable<T> {
+  fn scroll_down(&mut self) {
+    let selected_row = match self.state.selected() {
+      Some(i) => {
+        if i >= self.items.len() - 1 {
+          0
+        } else {
+          i + 1
+        }
+      }
+      None => 0,
+    };
+
+    self.state.select(Some(selected_row));
+  }
+
+  fn scroll_up(&mut self) {
+    let selected_row = match self.state.selected() {
+      Some(i) => {
+        if i == 0 {
+          self.items.len() - 1
+        } else {
+          i - 1
+        }
+      }
+      None => 0,
+    };
+
+    self.state.select(Some(selected_row));
+  }
+}
+
+#[derive(Default)]
+pub struct ScrollableText {
+  pub items: Vec<String>,
+  pub offset: u16,
+}
+
+impl ScrollableText {
+  pub fn with_string(item: String) -> ScrollableText {
+    let items: Vec<&str> = item.split('\n').collect();
+    let items: Vec<String> = items.iter().map(|it| it.to_string()).collect();
+    ScrollableText { items, offset: 0 }
+  }
+
+  pub fn get_text(&self) -> String {
+    self.items.join("\n")
+  }
+}
+
+impl Scrollable for ScrollableText {
+  fn scroll_down(&mut self) {
+    if self.offset < self.items.len() as u16 {
+      self.offset += 1;
+    }
+  }
+
+  fn scroll_up(&mut self) {
+    if self.offset > 0 {
+      self.offset -= 1;
+    }
+  }
+}
+
+#[derive(Default, Deserialize, Debug, Clone, PartialEq, Eq)]
+#[serde(from = "String")]
+pub struct HorizontallyScrollableText {
+  pub text: String,
+  pub offset: RefCell<usize>,
+}
+
+impl From<String> for HorizontallyScrollableText {
+  fn from(input: String) -> HorizontallyScrollableText {
+    HorizontallyScrollableText::new(input)
+  }
+}
+
+impl Display for HorizontallyScrollableText {
+  fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+    if *self.offset.borrow() == 0 {
+      write!(f, "{}", self.text)
+    } else {
+      write!(f, "{}", &self.text[*self.offset.borrow()..])
+    }
+  }
+}
+
+impl HorizontallyScrollableText {
+  pub fn new(input: String) -> HorizontallyScrollableText {
+    HorizontallyScrollableText {
+      text: format!("{}        ", input),
+      offset: RefCell::new(0),
+    }
+  }
+
+  pub fn scroll_text(&self) {
+    let new_offset = *self.offset.borrow() + 1;
+    *self.offset.borrow_mut() = new_offset % self.text.len();
+  }
+
+  pub fn reset_offset(&self) {
+    *self.offset.borrow_mut() = 0;
+  }
+}
+
+#[derive(Clone)]
+pub struct TabRoute {
+  pub title: String,
+  pub route: Route,
+  pub help: String,
+}
+
+pub struct TabState {
+  pub tabs: Vec<TabRoute>,
+  pub index: usize,
+}
+
+impl TabState {
+  pub fn new(tabs: Vec<TabRoute>) -> TabState {
+    TabState { tabs, index: 0 }
+  }
+
+  pub fn set_index(&mut self, index: usize) -> &TabRoute {
+    self.index = index;
+    &self.tabs[self.index]
+  }
+
+  pub fn get_active_route(&self) -> &Route {
+    &self.tabs[self.index].route
+  }
+
+  pub fn get_active_tab_help(&self) -> String {
+    self.tabs[self.index].help.clone()
+  }
+
+  pub fn next(&mut self) {
+    self.index = (self.index + 1) % self.tabs.len();
+  }
+
+  pub fn previous(&mut self) {
+    if self.index > 0 {
+      self.index -= 1;
+    } else {
+      self.index = self.tabs.len() - 1;
+    }
+  }
+}