@kellanjs/actioncraft/dist/core/transformation.js

Fluent, type-safe builder for Next.js server actions.

import { INTERNAL_ERROR_TYPES } from "../types/errors.js";
import { UNHANDLED_ERROR } from "./errors.js";
/**
 * Converts input to a serializable format for the `values` field in action results.
 *
 * If the input is `FormData`, it is flattened into a plain object so that it can
 * be safely JSON-serialized. Otherwise, the input is returned as-is.
 */
export function serializeRawInput(input) {
    if (input instanceof FormData) {
        const valueMap = new Map();
        for (const [key, value] of input.entries()) {
            // Ignore React server-action meta-fields
            if (key.startsWith("$ACTION"))
                continue;
            const stringValue = typeof value === "string" ? value : value.name || "[File]";
            if (!valueMap.has(key))
                valueMap.set(key, []);
            valueMap.get(key).push(stringValue);
        }
        // Collapse single-item arrays
        const serialized = {};
        for (const [key, values] of valueMap.entries()) {
            serialized[key] = values.length === 1 ? values[0] : values;
        }
        return serialized;
    }
    // Non-FormData inputs are assumed to already be serialisable
    return input;
}
/**
 * Converts internal error objects into client-facing errors, hiding
 * implementation details that should not leak outside the server.
 */
export function convertToClientError(internalError) {
    if (internalError.type === INTERNAL_ERROR_TYPES.IMPLICIT_RETURN ||
        internalError.type === INTERNAL_ERROR_TYPES.OUTPUT_VALIDATION ||
        internalError.type === INTERNAL_ERROR_TYPES.INTERNAL_LOGIC) {
        return UNHANDLED_ERROR;
    }
    return internalError;
}
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