Write a little app to demonstrate reading an an SGF file

Cargo.lock

@@ -3687,6 +3687,7 @@ dependencies = [
  "serde 1.0.193",
  "thiserror",
  "typeshare",
+ "uuid 0.8.2",
 ]
 
 [[package]]

sgf/Cargo.toml

@@ -11,6 +11,7 @@ nom         = { version = "7" }
 serde       = { version = "1", features = [ "derive" ] }
 thiserror   = { version = "1"}
 typeshare   = { version = "1" }
+uuid        = { version = "0.8", features = ["v4", "serde"] }
 
 [dev-dependencies]
 cool_asserts    = { version = "2" }

sgf/src/bin/read_sgf.rs

@@ -0,0 +1,19 @@
+use sgf::parse_sgf_file;
+use std::path::PathBuf;
+use std::env;
+
+fn main() {
+    let mut args = env::args();
+
+    let _ = args.next();
+    let file = PathBuf::from(args.next().unwrap());
+
+    println!("{:?}", file);
+
+    let games = parse_sgf_file(&file).unwrap();
+    for sgf in games {
+        if let Ok(sgf) = sgf {
+            println!("{:?}", sgf.white_player);
+        }
+    }
+}

sgf/src/game.rs

@@ -0,0 +1,819 @@
+use crate::{
+    parser::{self, Annotation, Evaluation, Move, SetupInstr, Size, UnknownProperty},
+    Color, Date, GameResult, GameType,
+};
+use std::{collections::HashSet, time::Duration};
+use uuid::Uuid;
+
+#[derive(Clone, Debug, PartialEq)]
+pub enum GameError {
+    InvalidGame,
+    RequiredPropertiesMissing,
+    InvalidGameNode(GameNodeError),
+}
+
+#[derive(Clone, Debug, PartialEq)]
+pub enum MoveNodeError {
+    IncompatibleProperty(parser::Property),
+    ConflictingProperty,
+    NotAMoveNode,
+    ChildError(Box<GameNodeError>),
+}
+
+#[derive(Clone, Debug, PartialEq)]
+pub enum SetupNodeError {
+    IncompatibleProperty(parser::Property),
+    ConflictingProperty,
+    ConflictingPosition,
+    NotASetupNode,
+    ChildError(Box<GameNodeError>),
+}
+
+#[derive(Clone, Debug, PartialEq)]
+pub enum GameNodeError {
+    UnsupportedGameNode(MoveNodeError, SetupNodeError),
+    ConflictingProperty,
+    ConflictingPosition,
+}
+
+#[derive(Clone, Debug, PartialEq, Default)]
+pub struct Player {
+    pub name: Option<String>,
+    pub rank: Option<String>,
+    pub team: Option<String>,
+}
+
+/// This represents the more semantic version of the game parser. Where the `parser` crate pulls
+/// out a raw set of nodes, this structure is guaranteed to be a well-formed game. Getting to this
+/// level, the interpreter will reject any games that have setup properties and move properties
+/// mixed in a single node. If there are other semantic problems, the interpreter will reject
+/// those, as well. Where the function of the parser is to understand and correct fundamental
+/// syntax issues, the result of the Game is to have a fully-understood game. However, this doesn't
+/// (yet?) go quite to the level of apply the game type (i.e., this is Go, Chess, Yinsh, or
+/// whatever).
+#[derive(Clone, Debug, PartialEq)]
+pub struct Game {
+    pub game_type: GameType,
+
+    // TODO: board size is not necessary in all games. Hive has no defined board size.
+    pub board_size: Size,
+    pub black_player: Player,
+    pub white_player: Player,
+
+    pub app: Option<String>,
+    pub annotator: Option<String>,
+    pub copyright: Option<String>,
+    pub dates: Vec<Date>,
+    pub event: Option<String>,
+    pub game_name: Option<String>,
+    pub extra_info: Option<String>,
+    pub opening_info: Option<String>,
+    pub location: Option<String>,
+    pub result: Option<GameResult>,
+    pub round: Option<String>,
+    pub rules: Option<String>,
+    pub source: Option<String>,
+    pub time_limit: Option<Duration>,
+    pub overtime: Option<String>,
+    pub transcriber: Option<String>,
+
+    pub children: Vec<GameNode>,
+}
+
+impl Game {
+    pub fn new(
+        game_type: GameType,
+        board_size: Size,
+        black_player: Player,
+        white_player: Player,
+    ) -> Self {
+        Self {
+            game_type,
+            board_size,
+            black_player,
+            white_player,
+
+            app: None,
+            annotator: None,
+            copyright: None,
+            dates: vec![],
+            event: None,
+            game_name: None,
+            extra_info: None,
+            opening_info: None,
+            location: None,
+            result: None,
+            round: None,
+            rules: None,
+            source: None,
+            time_limit: None,
+            overtime: None,
+            transcriber: None,
+
+            children: vec![],
+        }
+    }
+}
+
+impl Node for Game {
+    fn children<'a>(&'a self) -> Vec<&'a GameNode> {
+        self.children.iter().collect::<Vec<&'a GameNode>>()
+    }
+
+    fn add_child<'a>(&'a mut self, node: GameNode) -> &'a mut GameNode {
+        self.children.push(node);
+        self.children.last_mut().unwrap()
+    }
+}
+
+impl TryFrom<&parser::Tree> for Game {
+    type Error = GameError;
+
+    fn try_from(tree: &parser::Tree) -> Result<Self, Self::Error> {
+        let mut ty = None;
+        let mut size = None;
+        let mut black_player = Player {
+            name: None,
+            rank: None,
+            team: None,
+        };
+        let mut white_player = Player {
+            name: None,
+            rank: None,
+            team: None,
+        };
+
+        for prop in tree.root.properties.iter() {
+            match prop {
+                parser::Property::GameType(ty_) => ty = Some(ty_.clone()),
+                parser::Property::BoardSize(size_) => size = Some(size_.clone()),
+                parser::Property::BlackPlayer(name) => {
+                    black_player.name = Some(name.clone());
+                }
+                parser::Property::WhitePlayer(name) => {
+                    white_player.name = Some(name.clone());
+                }
+                parser::Property::BlackRank(rank) => {
+                    black_player.rank = Some(rank.clone());
+                }
+                parser::Property::WhiteRank(rank) => {
+                    white_player.rank = Some(rank.clone());
+                }
+                parser::Property::BlackTeam(team) => {
+                    black_player.team = Some(team.clone());
+                }
+                parser::Property::WhiteTeam(team) => {
+                    white_player.team = Some(team.clone());
+                }
+                _ => {}
+            }
+        }
+
+        let mut s = match (ty, size) {
+            (Some(ty), Some(size)) => Ok(Self::new(ty, size, black_player, white_player)),
+            _ => Err(Self::Error::RequiredPropertiesMissing),
+        }?;
+
+        for prop in tree.root.properties.iter() {
+            match prop {
+                parser::Property::GameType(_)
+                | parser::Property::BoardSize(_)
+                | parser::Property::BlackPlayer(_)
+                | parser::Property::WhitePlayer(_)
+                | parser::Property::BlackRank(_)
+                | parser::Property::WhiteRank(_)
+                | parser::Property::BlackTeam(_)
+                | parser::Property::WhiteTeam(_) => {}
+                parser::Property::Application(v) => s.app = Some(v.clone()),
+                parser::Property::Annotator(v) => s.annotator = Some(v.clone()),
+                parser::Property::Copyright(v) => s.copyright = Some(v.clone()),
+                parser::Property::EventDates(v) => s.dates = v.clone(),
+                parser::Property::EventName(v) => s.event = Some(v.clone()),
+                parser::Property::GameName(v) => s.game_name = Some(v.clone()),
+                parser::Property::ExtraGameInformation(v) => s.extra_info = Some(v.clone()),
+                parser::Property::GameOpening(v) => s.opening_info = Some(v.clone()),
+                parser::Property::GameLocation(v) => s.location = Some(v.clone()),
+                parser::Property::Result(v) => s.result = Some(v.clone()),
+                parser::Property::Round(v) => s.round = Some(v.clone()),
+                parser::Property::Ruleset(v) => s.rules = Some(v.clone()),
+                parser::Property::Source(v) => s.source = Some(v.clone()),
+                parser::Property::TimeLimit(v) => s.time_limit = Some(v.clone()),
+                parser::Property::Overtime(v) => s.overtime = Some(v.clone()),
+                // parser::Property::Data(v) => s.transcriber = Some(v.clone()),
+                _ => {}
+            }
+        }
+
+        s.children = tree
+            .root
+            .next
+            .iter()
+            .map(|node| GameNode::try_from(node))
+            .collect::<Result<Vec<GameNode>, GameNodeError>>()
+            .map_err(GameError::InvalidGameNode)?;
+
+        Ok(s)
+    }
+}
+
+#[derive(Clone, Debug, PartialEq)]
+pub enum GameNode {
+    MoveNode(MoveNode),
+    SetupNode(SetupNode),
+}
+
+pub trait Node {
+    /// Provide a pre-order traversal of all of the nodes in the game tree.
+    fn nodes<'a>(&'a self) -> Vec<&'a GameNode> {
+        self.children()
+            .iter()
+            .map(|node| {
+                let mut children = node.nodes();
+                let mut v = vec![*node];
+                v.append(&mut children);
+                v
+            })
+            .flatten()
+            .collect::<Vec<&'a GameNode>>()
+    }
+
+    fn children<'a>(&'a self) -> Vec<&'a GameNode>;
+    fn add_child<'a>(&'a mut self, node: GameNode) -> &'a mut GameNode;
+}
+
+impl GameNode {
+    pub fn id(&self) -> Uuid {
+        match self {
+            GameNode::MoveNode(node) => node.id,
+            GameNode::SetupNode(node) => node.id,
+        }
+    }
+}
+
+impl Node for GameNode {
+    fn children<'a>(&'a self) -> Vec<&'a GameNode> {
+        match self {
+            GameNode::MoveNode(node) => node.children(),
+            GameNode::SetupNode(node) => node.children(),
+        }
+    }
+
+    fn nodes<'a>(&'a self) -> Vec<&'a GameNode> {
+        match self {
+            GameNode::MoveNode(node) => node.nodes(),
+            GameNode::SetupNode(node) => node.nodes(),
+        }
+    }
+
+    fn add_child<'a>(&'a mut self, new_node: GameNode) -> &'a mut GameNode {
+        match self {
+            GameNode::MoveNode(node) => node.add_child(new_node),
+            GameNode::SetupNode(node) => node.add_child(new_node),
+        }
+    }
+}
+
+impl TryFrom<&parser::Node> for GameNode {
+    type Error = GameNodeError;
+
+    fn try_from(n: &parser::Node) -> Result<Self, Self::Error> {
+        // I originally wrote this recursively. However, on an ordinary game of a couple hundred
+        // moves, that meant that I was recursing 500 functions, and that exceeded the stack limit.
+        // So, instead, I need to unroll everything to non-recursive form.
+        //
+        // So, I can treat each branch of the tree as a single line. Iterate over that line. I can
+        // only use the MoveNode::try_from and SetupNode::try_from if those functions don't
+        // recurse. Instead, I'm going to process just that node, then return to here and process
+        // the children.
+        let move_node = MoveNode::try_from(n);
+        let setup_node = SetupNode::try_from(n);
+
+        // I'm much too tired when writing this. I'm still recursing, but I did cut the number of
+        // recursions in half. This helps, but it still doesn't guarantee that I'm going to be able
+        // to parse all possible games. So, still, treat each branch of the game as a single line.
+        // Iterate over that line, don't recurse. Create bookmarks at each branch point, and then
+        // come back to each one.
+        let children = n
+            .next
+            .iter()
+            .map(|n| GameNode::try_from(n))
+            .collect::<Result<Vec<Self>, Self::Error>>()?;
+
+        let node = match (move_node, setup_node) {
+            (Ok(mut node), _) => {
+                node.children = children;
+                Ok(Self::MoveNode(node))
+            }
+            (Err(_), Ok(mut node)) => {
+                node.children = children;
+                Ok(Self::SetupNode(node))
+            }
+            (Err(move_err), Err(setup_err)) => {
+                Err(Self::Error::UnsupportedGameNode(move_err, setup_err))
+            }
+        }?;
+
+        Ok(node)
+    }
+}
+
+#[derive(Clone, Debug, PartialEq)]
+pub struct MoveNode {
+    id: Uuid,
+    color: Color,
+    mv: Move,
+    children: Vec<GameNode>,
+
+    time_left: Option<Duration>,
+    moves_left: Option<usize>,
+    name: Option<String>,
+    evaluation: Option<Evaluation>,
+    value: Option<f64>,
+    comments: Option<String>,
+    annotation: Option<Annotation>,
+    unknown_props: Vec<(String, String)>,
+}
+
+impl MoveNode {
+    pub fn new(color: Color, mv: Move) -> Self {
+        Self {
+            id: Uuid::new_v4(),
+            color,
+            mv,
+            children: Vec::new(),
+
+            time_left: None,
+            moves_left: None,
+            name: None,
+            evaluation: None,
+            value: None,
+            comments: None,
+            annotation: None,
+            unknown_props: vec![],
+        }
+    }
+}
+
+impl Node for MoveNode {
+    fn children<'a>(&'a self) -> Vec<&'a GameNode> {
+        self.children.iter().collect::<Vec<&'a GameNode>>()
+    }
+
+    fn add_child<'a>(&'a mut self, node: GameNode) -> &'a mut GameNode {
+        self.children.push(node);
+        self.children.last_mut().unwrap()
+    }
+}
+
+impl TryFrom<&parser::Node> for MoveNode {
+    type Error = MoveNodeError;
+
+    fn try_from(n: &parser::Node) -> Result<Self, Self::Error> {
+        let s = match n.mv() {
+            Some((color, mv)) => {
+                let mut s = Self::new(color, mv);
+
+                for prop in n.properties.iter() {
+                    match prop {
+                        parser::Property::Move((color, mv)) => {
+                            if s.color != *color || s.mv != *mv {
+                                return Err(Self::Error::ConflictingProperty);
+                            }
+                        }
+                        parser::Property::TimeLeft((color, duration)) => {
+                            if s.color != *color {
+                                return Err(Self::Error::ConflictingProperty);
+                            }
+                            if s.time_left.is_some() {
+                                return Err(Self::Error::ConflictingProperty);
+                            }
+                            s.time_left = Some(duration.clone());
+                        }
+                        parser::Property::Comment(cmt) => {
+                            if s.comments.is_some() {
+                                return Err(Self::Error::ConflictingProperty);
+                            }
+                            s.comments = Some(cmt.clone());
+                        }
+                        parser::Property::Evaluation(evaluation) => {
+                            if s.evaluation.is_some() {
+                                return Err(Self::Error::ConflictingProperty);
+                            }
+                            s.evaluation = Some(*evaluation)
+                        }
+                        parser::Property::Annotation(annotation) => {
+                            if s.annotation.is_some() {
+                                return Err(Self::Error::ConflictingProperty);
+                            }
+                            s.annotation = Some(*annotation)
+                        }
+                        parser::Property::Territory(..) => {
+                            eprintln!("not processing territory property");
+                        }
+                        parser::Property::Unknown(UnknownProperty { ident, value }) => {
+                            s.unknown_props.push((ident.clone(), value.clone()));
+                        }
+                        _ => return Err(Self::Error::IncompatibleProperty(prop.clone())),
+                    }
+                }
+
+                Ok(s)
+            }
+            None => Err(Self::Error::NotAMoveNode),
+        }?;
+
+        Ok(s)
+    }
+}
+
+#[derive(Clone, Debug, PartialEq)]
+pub struct SetupNode {
+    id: Uuid,
+
+    positions: Vec<parser::SetupInstr>,
+    children: Vec<GameNode>,
+}
+
+impl SetupNode {
+    pub fn new(positions: Vec<parser::SetupInstr>) -> Result<Self, SetupNodeError> {
+        let mut board = HashSet::new();
+        for position in positions.iter() {
+            let point = match position {
+                SetupInstr::Piece((_, point)) => point,
+                SetupInstr::Clear(point) => point,
+            };
+            if board.contains(point) {
+                return Err(SetupNodeError::ConflictingPosition);
+            }
+            board.insert(point);
+        }
+
+        Ok(Self {
+            id: Uuid::new_v4(),
+            positions,
+            children: Vec::new(),
+        })
+    }
+}
+
+impl Node for SetupNode {
+    fn children<'a>(&'a self) -> Vec<&'a GameNode> {
+        self.children.iter().collect::<Vec<&'a GameNode>>()
+    }
+
+    #[allow(dead_code)]
+    fn add_child<'a>(&'a mut self, _node: GameNode) -> &'a mut GameNode {
+        unimplemented!()
+    }
+}
+
+impl TryFrom<&parser::Node> for SetupNode {
+    type Error = SetupNodeError;
+
+    fn try_from(n: &parser::Node) -> Result<Self, Self::Error> {
+        match n.setup() {
+            Some(elements) => Self::new(elements),
+            None => Err(Self::Error::NotASetupNode),
+        }
+    }
+}
+
+#[allow(dead_code)]
+pub fn path_to_node<'a>(node: &'a GameNode, id: Uuid) -> Vec<&'a GameNode> {
+    if node.id() == id {
+        return vec![node];
+    }
+
+    for child in node.children() {
+        let mut path = path_to_node(child, id);
+        if path.len() > 1 {
+            path.push(child);
+            return path;
+        }
+    }
+
+    Vec::new()
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+    use cool_asserts::assert_matches;
+
+    #[test]
+    fn it_can_create_an_empty_game_tree() {
+        let tree = Game::new(
+            GameType::Go,
+            Size {
+                width: 19,
+                height: 19,
+            },
+            Player::default(),
+            Player::default(),
+        );
+        assert_eq!(tree.nodes().len(), 0);
+    }
+
+    #[test]
+    fn it_can_add_moves_to_a_game() {
+        let mut game = Game::new(
+            GameType::Go,
+            Size {
+                width: 19,
+                height: 19,
+            },
+            Player::default(),
+            Player::default(),
+        );
+
+        let first_move = MoveNode::new(Color::Black, Move::Move("dd".to_owned()));
+        let first_ = game.add_child(GameNode::MoveNode(first_move.clone()));
+        let second_move = MoveNode::new(Color::White, Move::Move("qq".to_owned()));
+        first_.add_child(GameNode::MoveNode(second_move.clone()));
+
+        let nodes = game.nodes();
+        assert_eq!(nodes.len(), 2);
+        assert_eq!(nodes[0].id(), first_move.id);
+        assert_eq!(nodes[1].id(), second_move.id);
+    }
+
+    #[ignore]
+    #[test]
+    fn it_can_set_up_a_game() {
+        unimplemented!()
+    }
+
+    #[ignore]
+    #[test]
+    fn it_can_load_tree_from_sgf() {
+        unimplemented!()
+    }
+
+    #[test]
+    fn game_node_can_parse_sgf_move_node() {
+        let n = parser::Node {
+            properties: vec![
+                parser::Property::Move((Color::White, Move::Move("dp".to_owned()))),
+                parser::Property::TimeLeft((Color::White, Duration::from_secs(176))),
+                parser::Property::Comment("Comments in the game".to_owned()),
+            ],
+            next: vec![],
+        };
+        assert_matches!(GameNode::try_from(&n), Ok(GameNode::MoveNode(_)));
+    }
+}
+
+#[cfg(test)]
+mod root_node_tests {
+    #[ignore]
+    #[test]
+    fn it_rejects_move_properties() {
+        unimplemented!()
+    }
+
+    #[ignore]
+    #[test]
+    fn it_rejects_setup_properties() {
+        unimplemented!()
+    }
+
+    #[ignore]
+    #[test]
+    fn it_can_parse_a_root_sgf() {
+        unimplemented!()
+    }
+}
+
+#[cfg(test)]
+mod move_node_tests {
+    use crate::parser::PositionList;
+
+    use super::*;
+    use cool_asserts::assert_matches;
+
+    #[test]
+    fn it_can_parse_an_sgf_move_node() {
+        let n = parser::Node {
+            properties: vec![
+                parser::Property::Move((Color::White, Move::Move("dp".to_owned()))),
+                parser::Property::TimeLeft((Color::White, Duration::from_secs(176))),
+                parser::Property::Comment("Comments in the game".to_owned()),
+            ],
+            next: vec![],
+        };
+        assert_matches!(MoveNode::try_from(&n), Ok(node) => {
+            assert_eq!(node.color, Color::White);
+            assert_eq!(node.mv, Move::Move("dp".to_owned()));
+            assert_eq!(node.children, vec![]);
+            assert_eq!(node.time_left, Some(Duration::from_secs(176)));
+            assert_eq!(node.comments, Some("Comments in the game".to_owned()));
+        });
+    }
+
+    #[test]
+    fn it_rejects_an_sgf_setup_node() {
+        let n = parser::Node {
+            properties: vec![
+                parser::Property::Move((Color::White, Move::Move("dp".to_owned()))),
+                parser::Property::TimeLeft((Color::White, Duration::from_secs(176))),
+                parser::Property::SetupBlackStones(PositionList(vec![
+                    "dd".to_owned(),
+                    "de".to_owned(),
+                ])),
+            ],
+            next: vec![],
+        };
+        assert_matches!(
+            MoveNode::try_from(&n),
+            Err(MoveNodeError::IncompatibleProperty(_))
+        );
+    }
+}
+
+#[cfg(test)]
+mod setup_node_tests {
+    use crate::parser::SetupInstr;
+
+    use super::*;
+    use cool_asserts::assert_matches;
+
+    #[ignore]
+    #[test]
+    fn it_can_parse_an_sgf_setup_node() {
+        unimplemented!()
+    }
+
+    #[test]
+    fn it_rejects_conflicting_placement_properties() {
+        assert_matches!(
+            SetupNode::new(vec![
+                SetupInstr::Piece((Color::Black, "dd".to_owned())),
+                SetupInstr::Piece((Color::Black, "dd".to_owned())),
+            ]),
+            Err(SetupNodeError::ConflictingPosition)
+        );
+        assert_matches!(
+            SetupNode::new(vec![
+                SetupInstr::Piece((Color::Black, "dd".to_owned())),
+                SetupInstr::Piece((Color::Black, "ee".to_owned())),
+                SetupInstr::Piece((Color::White, "ee".to_owned())),
+            ]),
+            Err(SetupNodeError::ConflictingPosition)
+        );
+    }
+}
+
+#[cfg(test)]
+mod path_test {
+    #[ignore]
+    #[test]
+    fn returns_empty_list_if_no_game_nodes() {
+        unimplemented!()
+    }
+
+    #[ignore]
+    #[test]
+    fn returns_empty_list_if_node_not_found() {
+        unimplemented!()
+    }
+
+    #[ignore]
+    #[test]
+    fn path_excludes_root_node() {
+        unimplemented!()
+    }
+}
+
+#[cfg(test)]
+mod file_test {
+    use super::*;
+    use crate::Win;
+    use cool_asserts::assert_matches;
+    use parser::parse_collection;
+    use std::{fs::File, io::Read};
+
+    fn with_text(text: &str, f: impl FnOnce(Vec<Game>)) {
+        let (_, games) = parse_collection::<nom::error::VerboseError<&str>>(text).unwrap();
+        let games = games
+            .into_iter()
+            .map(|game| Game::try_from(&game).expect("game to parse"))
+            .collect::<Vec<Game>>();
+        f(games);
+    }
+
+    fn with_file(path: &std::path::Path, f: impl FnOnce(Vec<Game>)) {
+        let mut file = File::open(path).unwrap();
+        let mut text = String::new();
+        let _ = file.read_to_string(&mut text);
+        with_text(&text, f);
+    }
+
+    /// This test checks against an ordinary game from SGF. It is unannotated and should contain
+    /// only move nodes with no setup nodes. The original source is from a game I played on KGS.
+    #[test]
+    fn it_can_load_an_ordinary_unannotated_game() {
+        with_file(
+            std::path::Path::new("test_data/2020 USGO DDK, Round 1.sgf"),
+            |games| {
+                assert_eq!(games.len(), 1);
+                let game = &games[0];
+
+                assert_eq!(game.game_type, GameType::Go);
+                assert_eq!(
+                    game.board_size,
+                    Size {
+                        width: 19,
+                        height: 19
+                    }
+                );
+                assert_eq!(
+                    game.black_player,
+                    Player {
+                        name: Some("savanni".to_owned()),
+                        rank: Some("23k".to_owned()),
+                        team: None
+                    }
+                );
+                assert_eq!(
+                    game.white_player,
+                    Player {
+                        name: Some("Geckoz".to_owned()),
+                        rank: None,
+                        team: None
+                    }
+                );
+                assert_eq!(game.app, Some("CGoban:3".to_owned()));
+
+                assert_eq!(game.annotator, None);
+                assert_eq!(game.copyright, None);
+                assert_eq!(
+                    game.dates,
+                    vec![Date::Date(
+                        chrono::NaiveDate::from_ymd_opt(2020, 8, 5).unwrap()
+                    )]
+                );
+                assert_eq!(game.event, None);
+                assert_eq!(game.game_name, None);
+                assert_eq!(game.extra_info, None);
+                assert_eq!(game.opening_info, None);
+                assert_eq!(
+                    game.location,
+                    Some("The KGS Go Server at http://www.gokgs.com/".to_owned())
+                );
+                assert_eq!(game.result, Some(GameResult::White(Win::Score(17.5))));
+                assert_eq!(game.round, None);
+                assert_eq!(game.rules, Some("AGA".to_owned()));
+                assert_eq!(game.source, None);
+                assert_eq!(game.time_limit, Some(Duration::from_secs(1800)));
+                assert_eq!(game.overtime, Some("5x30 byo-yomi".to_owned()));
+                assert_eq!(game.transcriber, None);
+
+                /*
+                    Property {
+                        ident: "KM".to_owned(),
+                        values: vec!["7.50".to_owned()],
+                    },
+                ];
+
+                for i in 0..16 {
+                    assert_eq!(node.properties[i], expected_properties[i]);
+                }
+                */
+
+                let children = game.children();
+                let node = children.first().unwrap();
+                assert_matches!(node, GameNode::MoveNode(node) => {
+                    assert_eq!(node.color, Color::Black);
+                    assert_eq!(node.mv, Move::Move("pp".to_owned()));
+                    assert_eq!(node.time_left, Some(Duration::from_secs(1795)));
+                    assert_eq!(node.comments, Some("Geckoz [?]: Good game\nsavanni [23k?]: There we go! This UI is... tough.\nsavanni [23k?]: Have fun! Talk to you at the end.\nGeckoz [?]: Yeah, OGS is much better; I'm a UX professional\n".to_owned())
+                )});
+
+                let children = node.children();
+                let node = children.first().unwrap();
+                assert_matches!(node, GameNode::MoveNode(node) => {
+                    assert_eq!(node.color, Color::White);
+                    assert_eq!(node.mv, Move::Move("dp".to_owned()));
+                    assert_eq!(node.time_left, Some(Duration::from_secs(1765)));
+                    assert_eq!(node.comments, None);
+                });
+                /*
+                let node = node.next().unwrap();
+                let expected_properties = vec![
+                    Property {
+                        ident: "W".to_owned(),
+                        values: vec!["dp".to_owned()],
+                    },
+                    Property {
+                        ident: "WL".to_owned(),
+                        values: vec!["1765.099".to_owned()],
+                    },
+                ];
+                for i in 0..2 {
+                    assert_eq!(node.properties[i], expected_properties[i]);
+                }
+                */
+            },
+        );
+    }
+}

sgf/src/lib.rs

@@ -1,12 +1,13 @@
 mod date;
-pub use date::Date;
-
+mod game;
 mod parser;
-pub use parser::parse_collection;
-
-use thiserror::Error;
-
 mod types;
+
+use std::{fs::File, io::Read};
+pub use date::Date;
+pub use game::Game;
+pub use parser::parse_collection;
+use thiserror::Error;
 pub use types::*;
 
 #[derive(Debug)]
@@ -57,6 +58,41 @@ impl From<nom::error::Error<&str>> for ParseError {
     }
 }
 
-pub fn parse_sgf(_input: &str) -> Result<Vec<Game>, Error> {
-    Ok(vec![Game::default()])
+pub fn parse_sgf(input: &str) -> Result<Vec<Result<Game, game::GameError>>, Error> {
+    let (_, games) = parse_collection::<nom::error::VerboseError<&str>>(&input)?;
+    let games = games.into_iter()
+        .map(|game| Game::try_from(&game))
+        .collect::<Vec<Result<Game, game::GameError>>>();
+
+    Ok(games)
 }
+
+pub fn parse_sgf_file(path: &std::path::Path) -> Result<Vec<Result<Game, game::GameError>>, Error> {
+    let mut file = File::open(path).unwrap();
+    let mut text = String::new();
+    let _ = file.read_to_string(&mut text);
+
+    parse_sgf(&text)
+}
+
+/*
+pub fn parse_sgf(_input: &str) -> Result<Vec<Game>, Error> {
+    Ok(vec![Game::new(
+        GameType::Go,
+        Size {
+            width: 19,
+            height: 19,
+        },
+        Player {
+            name: None,
+            rank: None,
+            team: None,
+        },
+        Player {
+            name: None,
+            rank: None,
+            team: None,
+        },
+    )])
+}
+*/

sgf/src/types.rs

@@ -1,25 +1,5 @@
-use crate::date::Date;
-
 use thiserror::Error;
 
-/// This is a placeholder structure. It is not meant to represent a game, only to provide a mock
-/// interface for code already written that expects a Game data type to exist.
-#[derive(Debug, Default)]
-pub struct Game {
-    pub info: GameInfo,
-}
-
-#[derive(Debug, Default)]
-pub struct GameInfo {
-    pub black_player: Option<String>,
-    pub black_rank: Option<String>,
-    pub white_player: Option<String>,
-    pub white_rank: Option<String>,
-    pub result: Option<GameResult>,
-    pub game_name: Option<String>,
-    pub date: Vec<Date>,
-}
-
 #[derive(Clone, Debug, PartialEq)]
 pub enum GameType {
     Go,