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export const JSON_VALUE_TYPE_DECL = 'export type JsonValue = string | number | boolean | null | JsonValue[] | { [key: string]: JsonValue };';
export function quoteKey(name: string): string {
return /^[a-zA-Z_$][a-zA-Z0-9_$]*$/.test(name) ? name : `'${name}'`;
}
/** Convert an HTTP header name (e.g. `preference-applied`, `X-Request-ID`, `ETag`) to camelCase for use as a JS property. */
export function headerNameToProperty(name: string): string {
const parts = name.split(/[-_]/).filter(Boolean);
return parts
.map((p, i) => {
const lower = p.toLowerCase();
return i === 0 ? lower : lower.charAt(0).toUpperCase() + lower.slice(1);
})
.join('');
}
// ─── TypeScript type rendering ────────────────────────────────────────────
export function renderTsType(type: ContractTypeNode): string {
switch (type.kind) {
case 'scalar':
return renderTsScalar(type.name);
case 'array': {
const inner = renderTsType(type.item);
const needsParens =
type.item.kind === 'union' ||
type.item.kind === 'discriminatedUnion' ||
type.item.kind === 'intersection' ||
type.item.kind === 'enum';
return needsParens ? `(${inner})[]` : `${inner}[]`;
}
case 'tuple':
return `[${type.items.map(renderTsType).join(', ')}]`;
case 'record':
return `Record<${renderTsType(type.key)}, ${renderTsType(type.value)}>`;
case 'enum':
return type.values.map(v => `'${v}'`).join(' | ');
case 'literal':
return typeof type.value === 'string' ? `'${type.value}'` : String(type.value);
case 'union':
return type.members.map(renderTsType).join(' | ');
case 'discriminatedUnion':
return type.members.map(renderTsType).join(' | ');
case 'intersection':
return type.members.map(renderTsType).join(' & ');
case 'ref':
return type.name;
case 'lazy':
return renderTsType(type.inner);
case 'inlineObject':
return renderTsInlineObject(type.fields);
default:
return 'unknown';
}
}
function renderTsScalar(name: string): string {
switch (name) {
case 'string':
case 'email':
case 'url':
case 'uuid':
return 'string';
case 'number':
case 'int':
return 'number';
case 'bigint':
return 'bigint';
case 'boolean':
return 'boolean';
case 'date':
case 'datetime':
case 'duration':
case 'interval':
return 'string';
case 'null':
return 'null';
case 'unknown':
return 'unknown';
case 'object':
return 'Record<string, unknown>';
case 'binary':
return 'Blob';
case 'json':
return 'JsonValue';
default:
return 'unknown';
}
}
function renderTsInlineObject(fields: FieldNode[]): string {
const entries = fields.map(f => {
const opt = f.optional ? '?' : '';
return `${quoteKey(f.name)}${opt}: ${renderTsType(f.type)}`;
});
return `{ ${entries.join('; ')} }`;
}
/**
* Like renderTsType, but substitutes model refs with their Input variant
* when the model has visibility modifiers. Used for request-side types
* (body, params, query, headers).
*/
export function renderInputTsType(type: ContractTypeNode, modelsWithInput?: Set<string>): string {
if (!modelsWithInput || modelsWithInput.size === 0) return renderTsType(type);
switch (type.kind) {
case 'ref':
return modelsWithInput.has(type.name) ? `${type.name}Input` : type.name;
case 'array': {
const inner = renderInputTsType(type.item, modelsWithInput);
const needsParens =
type.item.kind === 'union' ||
type.item.kind === 'discriminatedUnion' ||
type.item.kind === 'intersection' ||
type.item.kind === 'enum';
return needsParens ? `(${inner})[]` : `${inner}[]`;
}
case 'intersection':
return type.members.map(m => renderInputTsType(m, modelsWithInput)).join(' & ');
case 'union':
return type.members.map(m => renderInputTsType(m, modelsWithInput)).join(' | ');
case 'discriminatedUnion':
return type.members.map(m => renderInputTsType(m, modelsWithInput)).join(' | ');
case 'inlineObject':
return `{ ${type.fields.map(f => `${quoteKey(f.name)}${f.optional ? '?' : ''}: ${renderInputTsType(f.type, modelsWithInput)}`).join('; ')} }`;
case 'lazy':
return renderInputTsType(type.inner, modelsWithInput);
default:
return renderTsType(type);
}
}
/**
* Like renderTsType, but substitutes model refs with their Output variant
* (post-transform wire shape) when the model has format(output=...) or
* transitively references one. Used for response-side types in routers
* and SDK return types.
*/
export function renderOutputTsType(type: ContractTypeNode, modelsWithOutput?: Set<string>): string {
if (!modelsWithOutput || modelsWithOutput.size === 0) return renderTsType(type);
switch (type.kind) {
case 'ref':
return modelsWithOutput.has(type.name) ? `${type.name}Output` : type.name;
case 'array': {
const inner = renderOutputTsType(type.item, modelsWithOutput);
const needsParens =
type.item.kind === 'union' ||
type.item.kind === 'discriminatedUnion' ||
type.item.kind === 'intersection' ||
type.item.kind === 'enum';
return needsParens ? `(${inner})[]` : `${inner}[]`;
}
case 'intersection':
return type.members.map(m => renderOutputTsType(m, modelsWithOutput)).join(' & ');
case 'union':
return type.members.map(m => renderOutputTsType(m, modelsWithOutput)).join(' | ');
case 'discriminatedUnion':
return type.members.map(m => renderOutputTsType(m, modelsWithOutput)).join(' | ');
case 'inlineObject':
return `{ ${type.fields.map(f => `${quoteKey(f.name)}${f.optional ? '?' : ''}: ${renderOutputTsType(f.type, modelsWithOutput)}`).join('; ')} }`;
case 'lazy':
return renderOutputTsType(type.inner, modelsWithOutput);
default:
return renderTsType(type);
}
}
|