mazer/
error.rs

1use std::fmt;
2use serde_json;
3use crate::cell::{ Coordinates, MazeType };
4use crate::direction::Direction;
5use crate::algorithms::MazeAlgorithm;
6
7#[derive(Debug)]
8pub enum Error {
9    InvalidCellForDeltaMaze { cell_maze_type: MazeType },
10    InvalidCellForNonDeltaMaze { cell_maze_type: MazeType }, 
11    AlgorithmUnavailableForMazeType { algorithm: MazeAlgorithm, maze_type: MazeType },
12    FlattenedVectorDimensionsMismatch { vector_size: usize, maze_width: usize, maze_height: usize },
13    OutOfBoundsCoordinates { coordinates: Coordinates, maze_width: usize, maze_height: usize },
14    MissingCoordinates { coordinates: Coordinates },
15    NoValidNeighbor { coordinates: Coordinates },
16    MultipleActiveCells { count: usize },
17    NoActiveCells,
18    InvalidDirection { direction: String },
19    MoveUnavailable { attempted_move: Direction, available_moves: Vec<Direction>},
20    GridDimensionsExceedLimitForCaptureSteps { width: usize, height: usize },
21    NoCellAtCoordinates { coordinates: Coordinates },
22    InvalidCellCoordinates { coordinates: Coordinates },
23    InvalidStartCoordinates { coordinates: Coordinates },
24    InvalidGoalCoordinates { coordinates: Coordinates },
25    SerializationError(serde_json::Error),
26    EmptyList,
27}
28
29impl fmt::Display for Error {
30    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
31        match self {
32            Error::InvalidCellForDeltaMaze { cell_maze_type } => {
33                write!(f, "Cannot generate non-triangle cells for Delta maze_type {:?}", cell_maze_type)
34            }
35            Error::InvalidCellForNonDeltaMaze { cell_maze_type } => {
36                write!(f, "Cannot generate triangle cells for non-Delta maze_type {:?}", cell_maze_type)
37            }
38            Error::AlgorithmUnavailableForMazeType{ algorithm, maze_type } => {
39                write!(f, "MazeAlgorithm {:?} is unavailable for MazeType {:?}", algorithm, maze_type)
40            }
41            Error::FlattenedVectorDimensionsMismatch { vector_size, maze_width, maze_height } => {
42                write!(f, "Flattened vector size mismatch: expected size {} ({} x {}), but got {}", maze_width * maze_height, maze_width, maze_height, vector_size)
43            }
44            Error::OutOfBoundsCoordinates { coordinates, maze_width, maze_height } => {
45                write!(f, "Out of bounds coordinates: coordinates {:?} exceed maze dimensions {} x {}", coordinates, maze_width, maze_height)
46            }
47            Error::MissingCoordinates { coordinates } => {
48                write!(f, "Missing coordinates: {:?}", coordinates )
49            }
50            Error::NoValidNeighbor { coordinates } => {
51                write!(f, "No valid neighbors: {:?}", coordinates )
52            }
53            Error::MultipleActiveCells { count } => {
54                write!(f, "{:?} active cells, there should only ever be exactly 1 active cell", count )
55            }
56            Error::NoActiveCells => {
57                write!(f, "No active cells, there should always be exactly 1 active cell" )
58            }
59            Error::MoveUnavailable { attempted_move, available_moves } => {
60                write!(f, "Cannot make move {:?} because it is unavailable. Available moves are: {:?}", attempted_move, available_moves.into_iter().map(|dir| dir.to_string()).collect::<Vec<_>>().join(", ") )
61            }
62            Error::InvalidDirection { direction } => {
63                write!(f, "Invalid Direction: {:?}", direction )
64            }
65            Error::GridDimensionsExceedLimitForCaptureSteps  { width, height } => {
66                write!(f, "Grid dimensions {:?},{:?} exceed limit for enabling capture_steps. Neither width nor height can exceed 100 for this feature to be enabled", width, height )
67            }
68            Error::NoCellAtCoordinates{ coordinates } => {
69                write!(f, "No cell exists at coordinates {:?}", coordinates )
70            }
71            Error::InvalidCellCoordinates{ coordinates } => {
72                write!(f, "Invalid cell coordinates {:?}", coordinates )
73            }
74            Error::InvalidStartCoordinates{ coordinates } => {
75                write!(f, "Invalid start coordinates {:?}", coordinates )
76            }
77            Error::InvalidGoalCoordinates{ coordinates } => {
78                write!(f, "Invalid goal coordinates {:?}", coordinates )
79            }
80            Error::SerializationError(e) => {
81                write!(f, "Serialization error: {}", e)
82            }
83            Error::EmptyList => {
84                write!(f, "Attempted operation on an empty list")
85            } 
86        }
87    }
88}
89
90impl std::error::Error for Error {
91    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
92        match self {
93            Error::SerializationError(e) => Some(e), // Return a reference to the error
94            _ => None,
95        }
96    }
97}
98
99impl From<serde_json::Error> for Error {
100    fn from(e: serde_json::Error) -> Self {
101        Error::SerializationError(e)
102    }
103}
mazer/error.rs

mazer/
error.rs
