fortify-schema/dist/esm/core/utils/Mod.js

A modern TypeScript validation library designed around familiar interface syntax and powerful conditional validation. Experience schema validation that feels natural to TypeScript developers while unlocking advanced runtime validation capabilities.

import { InterfaceSchema } from '../schema/mode/interfaces/InterfaceSchema.js';

/**
 * Schema modification utilities - transform and combine schemas
 */
class Mod {
    /**
     * Merge multiple schemas into a single schema
     * @example
     * ```typescript
     * const UserSchema = Interface({ id: "number", name: "string" });
     * const ProfileSchema = Interface({ bio: "string?", avatar: "url?" });
     *
     * const MergedSchema = Mod.merge(UserSchema, ProfileSchema);
     * // Result: { id: number, name: string, bio?: string, avatar?: string }
     * ```
     */
    static merge(schema1, schema2) {
        // Get the internal definitions from both schemas
        const def1 = schema1.definition;
        const def2 = schema2.definition;
        // Merge the definitions
        const mergedDefinition = {
            ...def1,
            ...def2
        };
        // Get options from both schemas (schema2 options take precedence)
        const options1 = schema1.options || {};
        const options2 = schema2.options || {};
        const mergedOptions = { ...options1, ...options2 };
        return new InterfaceSchema(mergedDefinition, mergedOptions);
    }
    /**
     * Pick specific fields from a schema
     * @example
     * ```typescript
     * const UserSchema = Interface({
     *   id: "number",
     *   name: "string",
     *   email: "email",
     *   password: "string"
     * });
     *
     * const PublicUserSchema = Mod.pick(UserSchema, ["id", "name", "email"]);
     * // Result: { id: number, name: string, email: string }
     * ```
     */
    static pick(schema, keys) {
        const definition = schema.definition;
        const options = schema.options || {};
        // Create new definition with only the picked keys
        const pickedDefinition = {};
        for (const key of keys) {
            const keyStr = key;
            if (keyStr in definition) {
                pickedDefinition[keyStr] = definition[keyStr];
            }
        }
        return new InterfaceSchema(pickedDefinition, options);
    }
    /**
     * Omit specific fields from a schema
     * @example
     * ```typescript
     * const UserSchema = Interface({
     *   id: "number",
     *   name: "string",
     *   email: "email",
     *   password: "string"
     * });
     *
     * const SafeUserSchema = Mod.omit(UserSchema, ["password"]);
     * // Result: { id: number, name: string, email: string }
     * ```
     */
    static omit(schema, keys) {
        const definition = schema.definition;
        const options = schema.options || {};
        // Create new definition without the omitted keys
        const omittedDefinition = { ...definition };
        for (const key of keys) {
            const keyStr = key;
            delete omittedDefinition[keyStr];
        }
        return new InterfaceSchema(omittedDefinition, options);
    }
    /**
     * Make all fields in a schema optional
     * @example
     * ```typescript
     * const UserSchema = Interface({ id: "number", name: "string" });
     * const PartialUserSchema = Mod.partial(UserSchema);
     * // Result: { id?: number, name?: string }
     * ```
     */
    static partial(schema) {
        const definition = schema.definition;
        const options = schema.options || {};
        // Convert all fields to optional by adding "?" suffix
        const partialDefinition = {};
        for (const [key, value] of Object.entries(definition)) {
            if (typeof value === "string" && !value.endsWith("?")) {
                partialDefinition[key] = value + "?";
            }
            else {
                partialDefinition[key] = value;
            }
        }
        return new InterfaceSchema(partialDefinition, options);
    }
    /**
     * Make all fields in a schema required (remove optional markers)
     * @example
     * ```typescript
     * const UserSchema = Interface({ id: "number", name: "string?" });
     * const RequiredUserSchema = Mod.required(UserSchema);
     * // Result: { id: number, name: string }
     * ```
     */
    static required(schema) {
        const definition = schema.definition;
        const options = schema.options || {};
        // Remove "?" suffix from all fields
        const requiredDefinition = {};
        for (const [key, value] of Object.entries(definition)) {
            if (typeof value === "string" && value.endsWith("?")) {
                requiredDefinition[key] = value.slice(0, -1);
            }
            else {
                requiredDefinition[key] = value;
            }
        }
        return new InterfaceSchema(requiredDefinition, options);
    }
    /**
     * Extend a schema with additional fields
     * @example
     * ```typescript
     * const BaseSchema = Interface({ id: "number", name: "string" });
     * const ExtendedSchema = Mod.extend(BaseSchema, {
     *   email: "email",
     *   createdAt: "date"
     * });
     * // Result: { id: number, name: string, email: string, createdAt: Date }
     * ```
     */
    static extend(schema, extension) {
        const definition = schema.definition;
        const options = schema.options || {};
        const extendedDefinition = {
            ...definition,
            ...extension
        };
        return new InterfaceSchema(extendedDefinition, options);
    }
}

export { Mod };
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