Initial commit: MTG personal library catalog (Tauri v2 + React/TS)

Full working app with:
- Rust core (mtgc-core): Scryfall ingester, nucleo fuzzy search, SQLite two-DB
  architecture (reference.db + library.db via ATTACH), criteria filters, deck ops
- Tauri v2 shell exposing the core as typed IPC commands
- React/TS frontend: card entry, library browser, deck editor
- Features: fuzzy card search, color/CMC/type/commander-identity filters,
  tile/list view toggle, hover card previews, deck format + commander support,
  per-card location field, grouping by type/subtype/CMC/color, localStorage
  persistence for active tab/deck/grouping, Discord-inspired dark UI (#C8553D accent)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

crates/mtgc-core/src/library.rs

@@ -0,0 +1,192 @@
+//! Ownership operations: what cards the user has and how many.
+
+use std::collections::HashMap;
+
+use rusqlite::{params, OptionalExtension};
+
+use crate::db::REF_DB;
+use crate::error::Result;
+use crate::model::{CardRef, ColorSet, LibraryCard};
+use crate::Catalog;
+
+/// Map a row shaped `(oracle_id, quantity_owned, location, name, mana_value,
+/// colors, color_identity, type_line, image_uri)` into its library parts. Shared
+/// by [`Catalog::list_library`] and the criteria search.
+pub(crate) fn row_to_library_parts(
+    r: &rusqlite::Row,
+) -> rusqlite::Result<(String, i64, String, CardRef)> {
+    let oracle_id: String = r.get(0)?;
+    Ok((
+        oracle_id.clone(),
+        r.get::<_, i64>(1)?,
+        r.get::<_, String>(2)?,
+        CardRef {
+            oracle_id,
+            name: r.get(3)?,
+            mana_value: r.get(4)?,
+            colors: ColorSet(r.get::<_, i64>(5)? as u8),
+            color_identity: ColorSet(r.get::<_, i64>(6)? as u8),
+            type_line: r.get(7)?,
+            image_uri: r.get::<_, Option<String>>(8)?.unwrap_or_default(),
+        },
+    ))
+}
+
+impl Catalog {
+    /// Add `delta` copies of a card to the library (increment, creating the row
+    /// if needed). `delta` may be negative to decrement; the quantity floors at 0.
+    /// Returns the new owned quantity.
+    pub fn add_owned(&self, oracle_id: &str, delta: i64) -> Result<i64> {
+        let current: i64 = self
+            .conn
+            .query_row(
+                "SELECT quantity_owned FROM library_cards WHERE oracle_id = ?1",
+                params![oracle_id],
+                |r| r.get(0),
+            )
+            .optional()?
+            .unwrap_or(0);
+        self.set_owned(oracle_id, current + delta)
+    }
+
+    /// Set the absolute owned quantity for a card (0 removes ownership but keeps
+    /// any deck assignments referencing it).
+    pub fn set_owned(&self, oracle_id: &str, quantity: i64) -> Result<i64> {
+        let q = quantity.max(0);
+        self.conn.execute(
+            "INSERT INTO library_cards(oracle_id, quantity_owned) VALUES (?1, ?2)
+             ON CONFLICT(oracle_id) DO UPDATE SET quantity_owned = excluded.quantity_owned",
+            params![oracle_id, q],
+        )?;
+        Ok(q)
+    }
+
+    /// List every owned card (quantity_owned > 0) with deck context, ordered by
+    /// name. This is the "browse my library" view without extra criteria.
+    pub fn list_library(&self) -> Result<Vec<LibraryCard>> {
+        let deck_names = self.deck_names_by_oracle()?;
+        let assigned = self.assigned_totals_by_oracle()?;
+
+        let mut stmt = self.conn.prepare(&format!(
+            "SELECT lc.oracle_id, lc.quantity_owned, lc.location,
+                    oc.name, oc.mana_value, oc.colors, oc.color_identity, oc.type_line, {image}
+             FROM library_cards lc
+             JOIN {REF_DB}.oracle_cards oc ON oc.oracle_id = lc.oracle_id
+             WHERE lc.quantity_owned > 0
+             ORDER BY oc.name COLLATE NOCASE",
+            image = crate::db::image_subquery()
+        ))?;
+        let rows = stmt
+            .query_map([], row_to_library_parts)?
+            .collect::<std::result::Result<Vec<_>, _>>()?;
+
+        Ok(rows
+            .into_iter()
+            .map(|(oid, qty, location, card)| LibraryCard {
+                quantity_owned: qty,
+                decks: deck_names.get(&oid).cloned().unwrap_or_default(),
+                quantity_assigned: *assigned.get(&oid).unwrap_or(&0),
+                location,
+                card,
+            })
+            .collect())
+    }
+
+    /// Set the free-text storage location for a card (creates the library row if
+    /// absent). Empty string clears it.
+    pub fn set_location(&self, oracle_id: &str, location: &str) -> Result<()> {
+        self.conn.execute(
+            "INSERT INTO library_cards(oracle_id, location) VALUES (?1, ?2)
+             ON CONFLICT(oracle_id) DO UPDATE SET location = excluded.location",
+            params![oracle_id, location],
+        )?;
+        Ok(())
+    }
+
+    /// Map each owned/assigned oracle_id to the deck names it appears in.
+    pub(crate) fn deck_names_by_oracle(&self) -> Result<HashMap<String, Vec<String>>> {
+        let mut stmt = self.conn.prepare(
+            "SELECT dc.oracle_id, d.name
+             FROM deck_cards dc JOIN decks d ON d.id = dc.deck_id
+             ORDER BY d.name COLLATE NOCASE",
+        )?;
+        let mut map: HashMap<String, Vec<String>> = HashMap::new();
+        let rows = stmt.query_map([], |r| Ok((r.get::<_, String>(0)?, r.get::<_, String>(1)?)))?;
+        for row in rows {
+            let (oid, name) = row?;
+            map.entry(oid).or_default().push(name);
+        }
+        Ok(map)
+    }
+
+    pub(crate) fn assigned_totals_by_oracle(&self) -> Result<HashMap<String, i64>> {
+        let mut stmt = self
+            .conn
+            .prepare("SELECT oracle_id, SUM(quantity) FROM deck_cards GROUP BY oracle_id")?;
+        let mut map = HashMap::new();
+        let rows = stmt.query_map([], |r| Ok((r.get::<_, String>(0)?, r.get::<_, i64>(1)?)))?;
+        for row in rows {
+            let (oid, total) = row?;
+            map.insert(oid, total);
+        }
+        Ok(map)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::test_support;
+
+    #[test]
+    fn add_increment_and_floor() {
+        let fx = test_support::make();
+        let cat = &fx.catalog;
+
+        assert_eq!(cat.add_owned("sol-ring", 1).unwrap(), 1);
+        assert_eq!(cat.add_owned("sol-ring", 2).unwrap(), 3);
+        assert_eq!(cat.add_owned("sol-ring", -10).unwrap(), 0); // floors at 0
+        assert_eq!(cat.set_owned("sol-ring", 4).unwrap(), 4);
+
+        let lib = cat.list_library().unwrap();
+        let sol = lib.iter().find(|c| c.card.oracle_id == "sol-ring").unwrap();
+        assert_eq!(sol.quantity_owned, 4);
+        assert!(sol.decks.is_empty());
+        // Image URL is plumbed through from the printings table.
+        assert_eq!(sol.card.image_uri, "http://img/sol-ring");
+    }
+
+    #[test]
+    fn location_is_stored_and_listed() {
+        let fx = test_support::make();
+        let cat = &fx.catalog;
+        cat.add_owned("sol-ring", 1).unwrap();
+        cat.set_location("sol-ring", "Box 1").unwrap();
+
+        let lib = cat.list_library().unwrap();
+        let sol = lib.iter().find(|c| c.card.oracle_id == "sol-ring").unwrap();
+        assert_eq!(sol.location, "Box 1");
+
+        // Clearing works.
+        cat.set_location("sol-ring", "").unwrap();
+        let lib = cat.list_library().unwrap();
+        let sol = lib.iter().find(|c| c.card.oracle_id == "sol-ring").unwrap();
+        assert_eq!(sol.location, "");
+    }
+
+    #[test]
+    fn list_is_ordered_and_excludes_zero() {
+        let fx = test_support::make();
+        let cat = &fx.catalog;
+        cat.add_owned("serra-angel", 1).unwrap();
+        cat.add_owned("lightning-bolt", 1).unwrap();
+        cat.set_owned("sol-ring", 0).unwrap();
+
+        let names: Vec<_> = cat
+            .list_library()
+            .unwrap()
+            .into_iter()
+            .map(|c| c.card.name)
+            .collect();
+        assert_eq!(names, vec!["Lightning Bolt", "Serra Angel"]);
+    }
+}