Catch errors in word-finding; add start of scoring

src/lib.rs

@@ -156,6 +156,44 @@ struct Word<'a> {
     coords: Coordinates,
 }
 
+impl <'a> Word<'a> {
+
+    fn calculate_score(&self) -> u32{
+        let mut multiplier = 1;
+        let mut unmultiplied_score = 0;
+
+        for cell in self.cells.as_slice() {
+            let cell_value = cell.value.unwrap();
+            if cell_value.ephemeral {
+                let cell_multiplier =
+                    match cell.cell_type {
+                        CellType::Normal => {1}
+                        CellType::DoubleWord => {
+                            multiplier *= 2;
+                            1
+                        }
+                        CellType::DoubleLetter => {2}
+                        CellType::TripleLetter => {3}
+                        CellType::TripleWord => {
+                            multiplier *= 3;
+                            1
+                        }
+                        CellType::Start => {
+                            multiplier *= 2;
+                            1
+                        }
+                    };
+                unmultiplied_score += cell_value.points * cell_multiplier;
+            } else {
+                // no cell multiplier unfortunately
+                unmultiplied_score += cell_value.points;
+            }
+        }
+
+        unmultiplied_score * multiplier
+    }
+}
+
 impl Board {
     pub fn new() -> Self {
         let mut cells = Vec::new();
@@ -243,6 +281,22 @@ impl Board {
         }
     }
 
+    /*
+    fn calculate_scores(&self, dictionary: &Dictionary) -> Result<(Vec<(Word, u32)>, u32), &str> {
+        let words = self.find_played_words()?;
+        let mut words_and_scores = Vec::new();
+        let mut total_score = 0;
+
+        for word in words {
+            let mut word_score = 0;
+            let mut word_multiplier = 1;
+
+
+        }
+
+        todo!()
+    }*/
+
     fn find_played_words(&self) -> Result<Vec<Word>, &str> {
         // We don't assume that the move is valid, so let's first establish that
 
@@ -290,11 +344,13 @@ impl Board {
         starting_coords = main_word.coords;
 
         let mut words = Vec::new();
+        let mut observed_tiles_played = 0;
 
         // At this point we now know that we're at the start of the word and we have the direction.
         // Now we'll head forward and look for every word that intersects one of the played tiles
         for cell in main_word.cells.as_slice() {
             if cell.value.as_ref().unwrap().ephemeral {
+                observed_tiles_played += 1;
                 let side_word = self.find_word_at_position(cell.coordinates, direction.invert());
                 match side_word {
                     None => {}
@@ -307,10 +363,33 @@ impl Board {
             }
         }
 
+        // there are tiles not part of the main word
+        if observed_tiles_played != tiles_played {
+            return Err("Played tiles cannot have empty gap");
+        }
+
 
         words.push(main_word);
 
-        Ok(words)
+        // need to verify that the play is 'anchored'
+        let mut anchored = false;
+        'outer: for word in words.as_slice() {
+            for cell in word.cells.as_slice() {
+                // either one of the letters
+                if !cell.value.as_ref().unwrap().ephemeral || (cell.coordinates.0 == GRID_LENGTH / 2 && cell.coordinates.1 == GRID_LENGTH / 2){
+                    anchored = true;
+                    break 'outer;
+                }
+            }
+        }
+
+        if anchored {
+            Ok(words)
+        } else {
+            return Err("Played tiles must be anchored to something")
+        }
+
+
     }
 
     fn find_word_at_position(&self, mut start_coords: Coordinates, direction: Direction) -> Option<Word> {
@@ -555,6 +634,78 @@ mod tests {
 
 
 
+    }
+
+    #[test]
+    fn test_word_finding_anchor() {
+        let mut board = Board::new();
+
+        fn make_letter(x: char, ephemeral: bool) -> Letter {
+            Letter {
+                text: x,
+                points: 0,
+                ephemeral,
+                is_blank: false,
+            }
+        }
+
+        board.get_cell_mut(Coordinates(8, 6)).unwrap().value = Some(make_letter('J', true));
+        board.get_cell_mut(Coordinates(8, 7)).unwrap().value = Some(make_letter('O', true));
+        board.get_cell_mut(Coordinates(8, 8)).unwrap().value = Some(make_letter('E', true));
+        board.get_cell_mut(Coordinates(8, 9)).unwrap().value = Some(make_letter('L', true));
+
+        let words = board.find_played_words();
+        match words {
+            Ok(_) => {panic!("Expected the not-anchored error")}
+            Err(x) => {assert_eq!(x, "Played tiles must be anchored to something")}
+        }
+
+        // Adding anchor
+        board.get_cell_mut(Coordinates(7, 6)).unwrap().value = Some(make_letter('I', false));
+        assert!(board.find_played_words().is_ok());
+
+        board = Board::new();
+
+        // we go through center so this is anchored
+        board.get_cell_mut(Coordinates(7, 7)).unwrap().value = Some(make_letter('J', true));
+        board.get_cell_mut(Coordinates(8, 7)).unwrap().value = Some(make_letter('O', true));
+        board.get_cell_mut(Coordinates(9, 7)).unwrap().value = Some(make_letter('E', true));
+        board.get_cell_mut(Coordinates(10, 7)).unwrap().value = Some(make_letter('L', true));
+
+        assert!(board.find_played_words().is_ok());
+    }
+
+    #[test]
+    fn test_word_finding_with_break() {
+        // Verify that if I play my tiles on one row or column but with a break in-between I get an error
+
+        let mut board = Board::new();
+
+        fn make_letter(x: char, ephemeral: bool) -> Letter {
+            Letter {
+                text: x,
+                points: 0,
+                ephemeral,
+                is_blank: false,
+            }
+        }
+
+        board.get_cell_mut(Coordinates(8, 6)).unwrap().value = Some(Letter::new_fixed('J', 0));
+        board.get_cell_mut(Coordinates(8, 7)).unwrap().value = Some(make_letter('O', true));
+        board.get_cell_mut(Coordinates(8, 8)).unwrap().value = Some(make_letter('E', true));
+        board.get_cell_mut(Coordinates(8, 9)).unwrap().value = Some(Letter::new_fixed( 'L', 0));
+
+        board.get_cell_mut(Coordinates(8, 11)).unwrap().value = Some(make_letter('I', true));
+        board.get_cell_mut(Coordinates(8, 12)).unwrap().value = Some(Letter::new_fixed('S', 0));
+
+        let words = board.find_played_words();
+        match words {
+            Ok(_) => {panic!("Expected to find an error!")}
+            Err(x) => {
+                assert_eq!(x, "Played tiles cannot have empty gap")
+            }
+        }
+
     }
 
 
@@ -562,10 +713,10 @@ mod tests {
     fn test_word_finding_whole_board() {
         let mut board = Board::new();
 
-        fn make_letter(x: char, ephemeral: bool) -> Letter {
+        fn make_letter(x: char, ephemeral: bool, points: u32) -> Letter {
           Letter {
               text: x,
-              points: 0,
+              points,
               ephemeral,
               is_blank: false,
           }
@@ -577,19 +728,18 @@ mod tests {
             Err(x) => {assert_eq!(x, "Tiles need to be played")}
         }
 
-        board.get_cell_mut(Coordinates(8, 6)).unwrap().value = Some(Letter::new_fixed('J', 0));
+        board.get_cell_mut(Coordinates(8, 6)).unwrap().value = Some(Letter::new_fixed('J', 8));
-        board.get_cell_mut(Coordinates(8, 7)).unwrap().value = Some(make_letter('O', true));
+        board.get_cell_mut(Coordinates(8, 7)).unwrap().value = Some(make_letter('O', true, 1));
-        board.get_cell_mut(Coordinates(8, 8)).unwrap().value = Some(make_letter('E', true));
+        board.get_cell_mut(Coordinates(8, 8)).unwrap().value = Some(make_letter('E', true, 1));
-        board.get_cell_mut(Coordinates(8, 9)).unwrap().value = Some(Letter::new_fixed( 'L', 0));
+        board.get_cell_mut(Coordinates(8, 9)).unwrap().value = Some(Letter::new_fixed( 'L', 1));
 
+        board.get_cell_mut(Coordinates(0, 0)).unwrap().value = Some(Letter::new_fixed('I', 1));
+        board.get_cell_mut(Coordinates(1, 0)).unwrap().value = Some(Letter::new_fixed('S', 1));
 
-        board.get_cell_mut(Coordinates(0, 0)).unwrap().value = Some(Letter::new_fixed('I', 0));
+        board.get_cell_mut(Coordinates(3, 0)).unwrap().value = Some(Letter::new_fixed('C', 3));
-        board.get_cell_mut(Coordinates(1, 0)).unwrap().value = Some(Letter::new_fixed('S', 0));
+        board.get_cell_mut(Coordinates(4, 0)).unwrap().value = Some(Letter::new_fixed('O', 1));
-
+        board.get_cell_mut(Coordinates(5, 0)).unwrap().value = Some(Letter::new_fixed('O', 1));
-        board.get_cell_mut(Coordinates(3, 0)).unwrap().value = Some(Letter::new_fixed('C', 0));
+        board.get_cell_mut(Coordinates(6, 0)).unwrap().value = Some(Letter::new_fixed('L', 1));
-        board.get_cell_mut(Coordinates(4, 0)).unwrap().value = Some(Letter::new_fixed('O', 0));
-        board.get_cell_mut(Coordinates(5, 0)).unwrap().value = Some(Letter::new_fixed('O', 0));
-        board.get_cell_mut(Coordinates(6, 0)).unwrap().value = Some(Letter::new_fixed('L', 0));
 
         fn word_to_text(word: &Word) -> String {
             let mut text = String::with_capacity(word.cells.len());
@@ -601,12 +751,15 @@ mod tests {
         }
 
         fn check_board(board: &mut Board, inverted: bool) {
+            println!("{}", board);
             let words = board.find_played_words();
             match words {
                 Ok(x) => {
                     assert_eq!(x.len(), 1);
                     let word = x.get(0).unwrap();
                     assert_eq!(word_to_text(word), "JOEL");
+
+                    assert_eq!(word.calculate_score(), 8 + 1 + 2 + 1);
                 }
                 Err(e) => { panic!("Expected to find a word to play; found error {}", e) }
             }
@@ -625,8 +778,8 @@ mod tests {
                 return direction;
             };
 
-            board.get_cell_mut(maybe_invert(Coordinates(9, 8))).unwrap().value = Some(Letter::new_fixed('G', 0));
+            board.get_cell_mut(maybe_invert(Coordinates(9, 8))).unwrap().value = Some(Letter::new_fixed('G', 2));
-            board.get_cell_mut(maybe_invert(Coordinates(10, 8))).unwrap().value = Some(Letter::new_fixed('G', 0));
+            board.get_cell_mut(maybe_invert(Coordinates(10, 8))).unwrap().value = Some(Letter::new_fixed('G', 2));
 
             let word = board.find_word_at_position(Coordinates(8, 8), maybe_invert_direction(Direction::Row));
             match word {
@@ -636,6 +789,7 @@ mod tests {
                     assert_eq!(x.coords.1, 8);
 
                     assert_eq!(word_to_text(&x), "EGG");
+                    assert_eq!(x.calculate_score(), 2 + 2 + 2);
 
                 }
             }
@@ -646,13 +800,16 @@ mod tests {
                     assert_eq!(x.len(), 2);
                     let word = x.get(0).unwrap();
                     assert_eq!(word_to_text(word), "EGG");
+                    assert_eq!(word.calculate_score(), 2 + 2 + 2);
 
                     let word = x.get(1).unwrap();
                     assert_eq!(word_to_text(word), "JOEL");
+                    assert_eq!(word.calculate_score(), 8 + 1 + 2 + 1);
                 }
                 Err(e) => { panic!("Expected to find a word to play; found error {}", e) }
             }
-            board.get_cell_mut(maybe_invert(Coordinates(9, 8))).unwrap().value = Some(make_letter('G', true));
+            // replace one of the 'G' in EGG with an ephemeral to trigger an error
+            board.get_cell_mut(maybe_invert(Coordinates(9, 8))).unwrap().value = Some(make_letter('G', true, 2));
 
             let words = board.find_played_words();
             match words {