gatsby-source-prismic/src/runtime/normalizers/slices.ts

Gatsby source plugin for building websites using Prismic as a data source

import * as prismicT from "@prismicio/types";
import { IterableElement, Simplify } from "type-fest";

import {
	NormalizeConfig,
	NormalizedValue,
	NormalizerDependencies,
} from "../types";
import { normalize } from "../normalize";
import { isSharedSlice, isSlice } from "./slice";

export const isSlices = (value: unknown): value is prismicT.SliceZone => {
	return Array.isArray(value) && value.every((element) => isSlice(element));
};

type NormalizeSlicesConfig<Value extends prismicT.SliceZone> =
	NormalizeConfig<Value> & NormalizerDependencies;

export type NormalizedSlicesValue<
	Value extends prismicT.SliceZone = prismicT.SliceZone,
> = NormalizedValue<Simplify<IterableElement<Value>>>[];

export const slices = <Value extends prismicT.SliceZone>(
	config: NormalizeSlicesConfig<Value>,
): NormalizedSlicesValue<Value> => {
	return config.value.map((element) => {
		return normalize({
			...config,
			value: element,
			path: isSharedSlice(element)
				? [element.slice_type, element.variation]
				: [...config.path, element.slice_type],
		});
	}) as NormalizedSlicesValue<Value>;
};