import { get } from 'lodash/fp';
import { errors } from '@strapi/utils';
import { getService } from '../utils/index.mjs';

const { ApplicationError } = errors;
// TODO: v5 if implemented in the CM => delete this middleware
const validateLocaleCreation = async (ctx, next)=>{
    const { model } = ctx.params;
    const { query } = ctx.request;
    // Prevent empty body
    if (!ctx.request.body) {
        ctx.request.body = {};
    }
    const body = ctx.request.body;
    const { getValidLocale, isLocalizedContentType } = getService('content-types');
    const modelDef = strapi.getModel(model);
    if (!isLocalizedContentType(modelDef)) {
        return next();
    }
    // Prevent empty string locale
    const locale = get('locale', query) || get('locale', body) || undefined;
    // cleanup to avoid creating duplicates in single types
    ctx.request.query = {};
    let entityLocale;
    try {
        entityLocale = await getValidLocale(locale);
    } catch (e) {
        throw new ApplicationError("This locale doesn't exist");
    }
    body.locale = entityLocale;
    if (modelDef.kind === 'singleType') {
        const entity = await strapi.entityService.findMany(modelDef.uid, {
            locale: entityLocale
        }); // TODO: add this type to entityService
        ctx.request.query.locale = body.locale;
        // updating
        if (entity) {
            return next();
        }
    }
    return next();
};

export { validateLocaleCreation as default };
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