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use std::collections::HashMap;
use serde_json::Value;
use crate::Pos;
use crate::template::Template;
use crate::{Result, aerr};
pub struct RoomTemplate {
pub size: (i64, i64),
pub spawn: Pos,
pub field: Vec<Vec<Template>>
}
impl RoomTemplate {
pub fn from_json(jsonroom: &Value) -> Result<RoomTemplate>{
let size = (
jsonroom.get("width").ok_or("no with")?.as_i64().ok_or("with not a number")?,
jsonroom.get("height").ok_or("no height")?.as_i64().ok_or("height not a number")?
);
let spawn = Pos::from_json(jsonroom.get("spawn").ok_or("no spawn")?).ok_or("spawn not a pos")?;
let mut mapping = HashMap::new();
for (key, value) in jsonroom.get("mapping").ok_or("no mapping")?.as_object().ok_or("mapping not a json object")?.iter() {
let mut templates: Vec<Template> = Vec::new();
if value.is_array() {
for template in value.as_array().ok_or("weird")? {
templates.push(Template::from_json(template)?);
}
} else {
templates.push(Template::from_json(value)?);
}
mapping.insert(key.chars().next().ok_or("mapping key is empty string")?, templates);
}
let mut field = Vec::new();
field.resize((size.0 * size.1) as usize, Vec::new());
let jsonfield: &Vec<Value> = jsonroom.get("field").ok_or("no field")?.as_array().ok_or("field not an array")?;
// todo: what if size doesn't match actual dimensions
for (y, row) in jsonfield.iter().enumerate() {
for (x, ch) in row.as_str().ok_or("field row not a string")?.chars().enumerate() {
field[x + y * (size.0 as usize)] = mapping.get(&ch).ok_or(aerr!("char not found in mapping"))?.clone();
}
}
Ok(RoomTemplate {
size,
spawn,
field
})
}
}
#[cfg(test)]
mod tests {
use super::*;
use serde_json::json;
#[test]
fn simple_from_json() {
RoomTemplate::from_json(&json!({
"width": 6,
"height": 5,
"spawn": [1, 1],
"field": [
"######",
"#,,,,#",
"#,,,,#",
"#....#",
"######"
],
"mapping": {
"#": ["wall"],
",": "grass",
".": {"type": "grass", "args": [], "kwargs": {}}
}
})).unwrap();
}
}
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