1 files changed, 111 insertions, 0 deletions
diff --git a/src/frontend/keywords.rs b/src/frontend/keywords.rs
new file mode 100644
index 0000000..cb0c28f
--- /dev/null
+++ b/src/frontend/keywords.rs
@@ -0,0 +1,111 @@
+// bibiman - a TUI for managing BibLaTeX databases
+// Copyright (C) 2024  lukeflo
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+/////
+
+use super::app::{App, FormerArea};
+use super::entries::EntryTable;
+use crate::backend::search::BibiSearch;
+use ratatui::widgets::ListState;
+
+#[derive(Debug)]
+pub struct TagList {
+    pub tag_list_items: Vec<TagListItem>,
+    pub tag_list_state: ListState,
+}
+
+// Structure of the list items.
+#[derive(Debug)]
+pub struct TagListItem {
+    pub keyword: String,
+}
+
+// Function to process inputed characters and convert them (to string, or more complex function)
+impl TagListItem {
+    pub fn new(info: &str) -> Self {
+        Self {
+            keyword: info.to_string(),
+        }
+    }
+}
+
+impl FromIterator<String> for TagList {
+    fn from_iter<I: IntoIterator<Item = String>>(iter: I) -> Self {
+        let tag_list_items = iter
+            .into_iter()
+            .map(|info| TagListItem::new(&info))
+            .collect();
+        let tag_list_state = ListState::default(); // for preselection: .with_selected(Some(0));
+        Self {
+            tag_list_items,
+            tag_list_state,
+        }
+    }
+}
+
+impl App {
+    // Tag List commands
+
+    // Movement
+    pub fn select_next_tag(&mut self) {
+        self.tag_list.tag_list_state.select_next();
+    }
+
+    pub fn select_previous_tag(&mut self) {
+        self.tag_list.tag_list_state.select_previous();
+    }
+
+    pub fn select_first_tag(&mut self) {
+        self.tag_list.tag_list_state.select_first();
+    }
+
+    pub fn select_last_tag(&mut self) {
+        self.tag_list.tag_list_state.select_last();
+    }
+
+    pub fn get_selected_tag(&self) -> &str {
+        let idx = self.tag_list.tag_list_state.selected().unwrap();
+        let keyword = &self.tag_list.tag_list_items[idx].keyword;
+        keyword
+    }
+
+    pub fn search_tags(&mut self) {
+        let orig_list = &self.main_biblio.keyword_list;
+        let filtered_list =
+            BibiSearch::search_tag_list(&self.search_struct.search_string, orig_list.clone());
+        self.tag_list = TagList::from_iter(filtered_list)
+    }
+
+    // Filter the entry list by tags
+    // If already inside a filtered tag or entry list, apply the filtering
+    // to the already filtered list only
+    pub fn filter_for_tags(&mut self) {
+        let orig_list = {
+            if self.search_struct.inner_search {
+                let orig_list = &self.search_struct.filtered_entry_list;
+                orig_list
+            } else {
+                let orig_list = &self.biblio_data.entry_list.bibentries;
+                orig_list
+            }
+        };
+        let keyword = self.get_selected_tag();
+        let filtered_list = BibiSearch::filter_entries_by_tag(&keyword, &orig_list);
+        self.search_struct.filtered_entry_list = filtered_list;
+        self.entry_table = EntryTable::from_iter(self.search_struct.filtered_entry_list.clone());
+        self.toggle_area();
+        self.former_area = Some(FormerArea::TagArea);
+    }
+}