73 lines
2.4 KiB
Rust
73 lines
2.4 KiB
Rust
use crate::shared::state::AppState;
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use crate::shared::models::UserSession;
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use log::info;
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use rhai::Dynamic;
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use rhai::Engine;
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pub fn for_keyword(_state: &AppState, _user: UserSession, engine: &mut Engine) {
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engine
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.register_custom_syntax(&["EXIT", "FOR"], false, |_context, _inputs| {
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Err("EXIT FOR".into())
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})
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.unwrap();
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engine
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.register_custom_syntax(
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&[
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"FOR", "EACH", "$ident$", "IN", "$expr$", "$block$", "NEXT", "$ident$",
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],
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true,
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|context, inputs| {
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let loop_var = inputs[0].get_string_value().unwrap();
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let next_var = inputs[3].get_string_value().unwrap();
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if loop_var != next_var {
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return Err(format!(
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"NEXT variable '{}' doesn't match FOR EACH variable '{}'",
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next_var, loop_var
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)
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.into());
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}
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let collection = context.eval_expression_tree(&inputs[1])?;
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info!("Collection type: {}", collection.type_name());
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let ccc = collection.clone();
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let array = match collection.into_array() {
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Ok(arr) => arr,
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Err(err) => {
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return Err(format!(
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"foreach expected array, got {}: {}",
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ccc.type_name(),
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err
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)
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.into());
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}
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};
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let block = &inputs[2];
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let orig_len = context.scope().len();
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for item in array {
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context.scope_mut().push(loop_var.clone(), item);
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match context.eval_expression_tree(block) {
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Ok(_) => (),
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Err(e) if e.to_string() == "EXIT FOR" => {
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context.scope_mut().rewind(orig_len);
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break;
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}
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Err(e) => {
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context.scope_mut().rewind(orig_len);
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return Err(e);
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}
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}
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context.scope_mut().rewind(orig_len);
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}
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Ok(Dynamic::UNIT)
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},
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)
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.unwrap();
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}
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