From 10125139a92f34c9340683b401a84b98fba309f4 Mon Sep 17 00:00:00 2001
From: lashman <lashman@robotbrush.com>
Date: Fri, 20 Jun 2025 10:42:30 +0300
Subject: [PATCH] ipuz export

---
 cruciverb-core/src/export/ipuz.rs | 75 +++++++++++++++++++++++++++++++
 cruciverb-core/src/export/mod.rs  |  3 ++
 2 files changed, 78 insertions(+)
 create mode 100644 cruciverb-core/src/export/ipuz.rs
 create mode 100644 cruciverb-core/src/export/mod.rs

diff --git a/cruciverb-core/src/export/ipuz.rs b/cruciverb-core/src/export/ipuz.rs
new file mode 100644
index 0000000..5565730
--- /dev/null
+++ b/cruciverb-core/src/export/ipuz.rs
@@ -0,0 +1,75 @@
+use serde_json::{json, Value};
+
+use crate::grid::Cell;
+use crate::puzzle::Puzzle;
+
+/// Serialize a puzzle to ipuz JSON format.
+/// Spec: http://www.ipuz.org/
+pub fn to_ipuz(puzzle: &Puzzle, title: &str) -> Value {
+    let mut puzzle_grid = Vec::new();
+    let mut solution_grid = Vec::new();
+
+    // build cell number map
+    let mut cell_numbers = std::collections::HashMap::new();
+    for word in &puzzle.words {
+        cell_numbers.entry((word.row, word.col)).or_insert(word.clue_number);
+    }
+
+    for r in 0..puzzle.height {
+        let mut puzzle_row = Vec::new();
+        let mut solution_row = Vec::new();
+        for c in 0..puzzle.width {
+            match puzzle.grid.get(r, c) {
+                Cell::Black => {
+                    puzzle_row.push(json!("#"));
+                    solution_row.push(json!("#"));
+                }
+                Cell::Letter(ch) => {
+                    let num = cell_numbers.get(&(r, c));
+                    if let Some(&n) = num {
+                        puzzle_row.push(json!(n));
+                    } else {
+                        puzzle_row.push(json!(0));
+                    }
+                    solution_row.push(json!(ch.to_string()));
+                }
+                Cell::Empty => {
+                    let num = cell_numbers.get(&(r, c));
+                    if let Some(&n) = num {
+                        puzzle_row.push(json!(n));
+                    } else {
+                        puzzle_row.push(json!(0));
+                    }
+                    solution_row.push(json!(null));
+                }
+            }
+        }
+        puzzle_grid.push(puzzle_row);
+        solution_grid.push(solution_row);
+    }
+
+    let across_clues: Vec<Value> = puzzle.clues_across.iter().map(|c| {
+        json!([c.number, c.text])
+    }).collect();
+
+    let down_clues: Vec<Value> = puzzle.clues_down.iter().map(|c| {
+        json!([c.number, c.text])
+    }).collect();
+
+    json!({
+        "version": "http://ipuz.org/v2",
+        "kind": ["http://ipuz.org/crossword#1"],
+        "title": title,
+        "dimensions": {
+            "width": puzzle.width,
+            "height": puzzle.height,
+        },
+        "puzzle": puzzle_grid,
+        "solution": solution_grid,
+        "clues": {
+            "Across": across_clues,
+            "Down": down_clues,
+        },
+        "difficulty": puzzle.difficulty_score,
+    })
+}
diff --git a/cruciverb-core/src/export/mod.rs b/cruciverb-core/src/export/mod.rs
new file mode 100644
index 0000000..91c9db7
--- /dev/null
+++ b/cruciverb-core/src/export/mod.rs
@@ -0,0 +1,3 @@
+pub mod puz;
+pub mod ipuz;
+pub mod pdf;