feat(readarr): add the delete author handler

Handles the delete author prompt, toggling whether to delete files on
disk and whether to add a list exclusion before confirming.

Backing out of the prompt resets both toggles, so preferences from an
abandoned delete cannot leak into the next one.

src/handlers/readarr_handlers/library/delete_author_handler.rs

@@ -0,0 +1,151 @@
+use crate::app::App;
+use crate::event::Key;
+use crate::handlers::{KeyEventHandler, handle_prompt_toggle};
+use crate::matches_key;
+use crate::models::Route;
+use crate::models::readarr_models::DeleteParams;
+use crate::models::servarr_data::readarr::readarr_data::{
+  ActiveReadarrBlock, DELETE_AUTHOR_BLOCKS,
+};
+use crate::network::readarr_network::ReadarrEvent;
+
+#[cfg(test)]
+#[path = "delete_author_handler_tests.rs"]
+mod delete_author_handler_tests;
+
+pub(in crate::handlers::readarr_handlers) struct DeleteAuthorHandler<'a, 'b> {
+  key: Key,
+  app: &'a mut App<'b>,
+  active_readarr_block: ActiveReadarrBlock,
+  _context: Option<ActiveReadarrBlock>,
+}
+
+impl DeleteAuthorHandler<'_, '_> {
+  fn build_delete_author_params(&mut self) -> DeleteParams {
+    let id = self.app.data.readarr_data.authors.current_selection().id;
+    let delete_files = self.app.data.readarr_data.delete_files;
+    let add_import_list_exclusion = self.app.data.readarr_data.add_import_list_exclusion;
+    self.app.data.readarr_data.reset_delete_preferences();
+
+    DeleteParams {
+      id,
+      delete_files,
+      add_import_list_exclusion,
+    }
+  }
+}
+
+impl<'a, 'b> KeyEventHandler<'a, 'b, ActiveReadarrBlock> for DeleteAuthorHandler<'a, 'b> {
+  fn accepts(active_block: ActiveReadarrBlock) -> bool {
+    DELETE_AUTHOR_BLOCKS.contains(&active_block)
+  }
+
+  fn ignore_special_keys(&self) -> bool {
+    self.app.ignore_special_keys_for_textbox_input
+  }
+
+  fn new(
+    key: Key,
+    app: &'a mut App<'b>,
+    active_block: ActiveReadarrBlock,
+    _context: Option<ActiveReadarrBlock>,
+  ) -> DeleteAuthorHandler<'a, 'b> {
+    DeleteAuthorHandler {
+      key,
+      app,
+      active_readarr_block: active_block,
+      _context,
+    }
+  }
+
+  fn get_key(&self) -> Key {
+    self.key
+  }
+
+  fn is_ready(&self) -> bool {
+    !self.app.is_loading
+  }
+
+  fn handle_scroll_up(&mut self) {
+    if self.active_readarr_block == ActiveReadarrBlock::DeleteAuthorPrompt {
+      self.app.data.readarr_data.selected_block.up();
+    }
+  }
+
+  fn handle_scroll_down(&mut self) {
+    if self.active_readarr_block == ActiveReadarrBlock::DeleteAuthorPrompt {
+      self.app.data.readarr_data.selected_block.down();
+    }
+  }
+
+  fn handle_home(&mut self) {}
+
+  fn handle_end(&mut self) {}
+
+  fn handle_delete(&mut self) {}
+
+  fn handle_left_right_action(&mut self) {
+    if self.active_readarr_block == ActiveReadarrBlock::DeleteAuthorPrompt {
+      handle_prompt_toggle(self.app, self.key);
+    }
+  }
+
+  fn handle_submit(&mut self) {
+    if self.active_readarr_block == ActiveReadarrBlock::DeleteAuthorPrompt {
+      match self.app.data.readarr_data.selected_block.get_active_block() {
+        ActiveReadarrBlock::DeleteAuthorConfirmPrompt => {
+          if self.app.data.readarr_data.prompt_confirm {
+            self.app.data.readarr_data.prompt_confirm_action = Some(ReadarrEvent::DeleteAuthor(
+              self.build_delete_author_params(),
+            ));
+            self.app.should_refresh = true;
+          } else {
+            self.app.data.readarr_data.reset_delete_preferences();
+          }
+
+          self.app.pop_navigation_stack();
+        }
+        ActiveReadarrBlock::DeleteAuthorToggleDeleteFile => {
+          self.app.data.readarr_data.delete_files = !self.app.data.readarr_data.delete_files;
+        }
+        ActiveReadarrBlock::DeleteAuthorToggleAddListExclusion => {
+          self.app.data.readarr_data.add_import_list_exclusion =
+            !self.app.data.readarr_data.add_import_list_exclusion;
+        }
+        _ => (),
+      }
+    }
+  }
+
+  fn handle_esc(&mut self) {
+    if self.active_readarr_block == ActiveReadarrBlock::DeleteAuthorPrompt {
+      self.app.pop_navigation_stack();
+      self.app.data.readarr_data.reset_delete_preferences();
+      self.app.data.readarr_data.prompt_confirm = false;
+    }
+  }
+
+  fn handle_char_key_event(&mut self) {
+    if self.active_readarr_block == ActiveReadarrBlock::DeleteAuthorPrompt
+      && self.app.data.readarr_data.selected_block.get_active_block()
+        == ActiveReadarrBlock::DeleteAuthorConfirmPrompt
+      && matches_key!(confirm, self.key)
+    {
+      self.app.data.readarr_data.prompt_confirm = true;
+      self.app.data.readarr_data.prompt_confirm_action = Some(ReadarrEvent::DeleteAuthor(
+        self.build_delete_author_params(),
+      ));
+      self.app.should_refresh = true;
+
+      self.app.pop_navigation_stack();
+    }
+  }
+
+  fn app_mut(&mut self) -> &mut App<'b> {
+    self.app
+  }
+
+  fn current_route(&self) -> Route {
+    self.app.get_current_route()
+  }
+}