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query.rs
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query.rs
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use std::collections::HashMap;
use cairo_lang_defs::plugin::PluginDiagnostic;
use cairo_lang_semantic::patcher::RewriteNode;
use cairo_lang_starknet::contract::starknet_keccak;
use cairo_lang_syntax::node::db::SyntaxGroup;
use cairo_lang_syntax::node::{ast, TypedSyntaxNode};
pub struct Query {
pub rewrite_nodes: Vec<RewriteNode>,
pub diagnostics: Vec<PluginDiagnostic>,
}
impl Query {
pub fn from_expr(db: &dyn SyntaxGroup, expr: ast::Expr) -> Self {
let diagnostics = vec![];
let rewrite_nodes: Vec<RewriteNode> = vec![];
let mut query = Query { diagnostics, rewrite_nodes };
query.handle_expression(db, expr);
query
}
fn handle_expression(&mut self, db: &dyn SyntaxGroup, expression: ast::Expr) {
match expression {
ast::Expr::Tuple(tuple) => {
for element in tuple.expressions(db).elements(db) {
self.handle_expression(db, element);
}
}
ast::Expr::Path(path) => {
let binding = path.elements(db);
let last = binding.last().unwrap();
match last {
ast::PathSegment::WithGenericArgs(segment) => {
let generic = segment.generic_args(db);
let parameters = generic.generic_args(db).elements(db);
for parameter in parameters {
self.handle_expression(db, parameter);
}
}
ast::PathSegment::Simple(segment) => {
let var_prefix = segment.as_syntax_node().get_text(db).to_ascii_lowercase();
// TODO(https://github.com/dojoengine/dojo/issues/27): Properly compute component id
let component_id = format!(
"{:#x}",
starknet_keccak(path.as_syntax_node().get_text(db).as_bytes())
);
self.rewrite_nodes.push(RewriteNode::interpolate_patched(
"let $var_prefix$_ids = IWorld.lookup(world, $component_address$);",
HashMap::from([
("var_prefix".to_string(), RewriteNode::Text(var_prefix)),
("component_address".to_string(), RewriteNode::Text(component_id)),
]),
))
}
}
}
_ => {
return self.diagnostics.push(PluginDiagnostic {
message: "Unsupported query type. Must be tuple or single struct.".to_string(),
stable_ptr: expression.stable_ptr().untyped(),
});
}
}
}
}