rspyts-cli 2.0.0

Compiler and build orchestrator for rspyts
Documentation 
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use super::*;

pub(super) fn typescript_models(
    items: &NamespaceItems<'_>,
    context: &TypeScriptContext<'_>,
) -> Result<String> {
    let mut source = String::new();
    for import in typescript_type_imports(items, context)? {
        writeln!(
            source,
            "import type * as {} from {};",
            namespace_alias(&import),
            ts_string(&typescript_namespace_path(
                context.namespace,
                &import,
                "models.js"
            ))
        )?;
    }
    if namespace_refs(items)
        .iter()
        .any(|reference| reference_contains(reference, &|item| matches!(item, TypeRef::Json)))
    {
        source.push_str("\nexport type JsonValue = null | boolean | number | string | JsonValue[] | { readonly [key: string]: JsonValue };\n");
    }
    for definition in &items.types {
        emit_typescript_type(&mut source, definition, context)?;
    }
    Ok(source)
}

fn emit_typescript_type(
    source: &mut String,
    definition: &TypeDef,
    context: &TypeScriptContext<'_>,
) -> Result<()> {
    match &definition.shape {
        TypeShape::Struct { fields } => {
            emit_ts_doc(source, definition.docs.as_deref(), "")?;
            writeln!(source, "export interface {} {{", definition.name)?;
            for field in fields {
                emit_ts_doc(source, field.docs.as_deref(), "  ")?;
                writeln!(
                    source,
                    "  readonly {}{}: {};",
                    ts_property(&field.wire_name),
                    if field.required { "" } else { "?" },
                    type_ref(&field.ty, context)?
                )?;
            }
            source.push_str("}\n");
        }
        TypeShape::StringEnum { variants } => {
            emit_ts_doc(source, definition.docs.as_deref(), "")?;
            let union = variants
                .iter()
                .map(|variant| ts_string(&variant.wire_name))
                .collect::<Vec<_>>()
                .join(" | ");
            writeln!(
                source,
                "export type {} = {};",
                definition.name,
                if union.is_empty() { "never" } else { &union }
            )?;
            writeln!(
                source,
                "export const {} = Object.freeze({{",
                definition.name
            )?;
            for variant in variants {
                writeln!(
                    source,
                    "  {}: {},",
                    ts_property(&variant.rust_name),
                    ts_string(&variant.wire_name),
                )?;
            }
            source.push_str("} as const);\n");
        }
        TypeShape::TaggedEnum { tag, variants } => {
            for variant in variants {
                let name = tagged_variant_name(&definition.name, &variant.rust_name);
                emit_ts_doc(source, variant.docs.as_deref(), "")?;
                writeln!(source, "export interface {name} {{")?;
                writeln!(
                    source,
                    "  readonly {}: {};",
                    ts_property(tag),
                    ts_string(&variant.wire_name)
                )?;
                for field in &variant.fields {
                    emit_ts_doc(source, field.docs.as_deref(), "  ")?;
                    writeln!(
                        source,
                        "  readonly {}{}: {};",
                        ts_property(&field.wire_name),
                        if field.required { "" } else { "?" },
                        type_ref(&field.ty, context)?
                    )?;
                }
                source.push_str("}\n");
            }
            writeln!(
                source,
                "export type {} = {};",
                definition.name,
                variants
                    .iter()
                    .map(|variant| tagged_variant_name(&definition.name, &variant.rust_name))
                    .collect::<Vec<_>>()
                    .join(" | ")
            )?;
        }
        TypeShape::Alias { target } => {
            emit_ts_doc(source, definition.docs.as_deref(), "")?;
            writeln!(
                source,
                "export type {} = {};",
                definition.name,
                type_ref(target, context)?
            )?;
        }
    }
    Ok(())
}