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path: root/resources/assets/javascripts/lib/reststate-client.js
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function filterQueryString(obj) {
    return Object.keys(obj)
        .map(k => `filter[${k}]=${encodeURIComponent(obj[k])}`)
        .join('&');
}

const getOptionsQuery = (optionsObject = {}) =>
    Object.keys(optionsObject)
        .filter(k => typeof optionsObject[k] !== 'undefined')
        .map(k => `${k}=${encodeURIComponent(optionsObject[k])}`)
        .join('&');

const relatedResourceUrl = ({ parent, relationship }) => {
     const builtUrl = `${parent.type}/${parent.id}/${relationship}`;

    if (
        parent.relationships
        && Object.keys(parent.relationships).includes(relationship)
    ) {
        return parent.relationships[relationship].links?.related ?? builtUrl;
    }
    return builtUrl;
};

const extractData = response => response.data;

const extractErrorResponse = error => {
    if (error && error.response) {
        throw error.response;
    } else {
        throw error;
    }
};

class Resource {
    constructor({ name, httpClient }) {
        this.name = name;
        this.api = httpClient;
    }

    all({ options = {} } = {}) {
        let url;

        if (options.url) {
            ({ url } = options);
        } else {
            url = `${this.name}?${getOptionsQuery(options)}`;
        }

        return this.api.get(url).then(extractData).catch(extractErrorResponse);
    }

    find({ id, options } = {}) {
        const url = `${this.name}/${id}?${getOptionsQuery(options)}`;

        return this.api.get(url).then(extractData).catch(extractErrorResponse);
    }

    where({ filter, options } = {}) {
        const queryString = filterQueryString(filter);
        return this.api
            .get(`${this.name}?${queryString}&${getOptionsQuery(options)}`)
            .then(extractData)
            .catch(extractErrorResponse);
    }

    related({ parent, relationship = this.name, options }) {
        const baseUrl = relatedResourceUrl({ parent, relationship });
        const url = `${baseUrl}?${getOptionsQuery(options)}`;
        return this.api.get(url).then(extractData).catch(extractErrorResponse);
    }

    create(partialRecord) {
        const record = Object.assign({}, partialRecord, { type: this.name });
        const requestData = { data: record };
        return this.api
          .post(`${this.name}`, requestData)
          .then(extractData)
          .catch(extractErrorResponse);
    }

    createRelated(partialRecord) {
        const record = Object.assign({}, partialRecord, { type: this.name });
        const requestData = { data: record };
        return this.api
            .post(`${this.name}`, requestData)
            .then(extractData)
            .catch(extractErrorResponse);
    }

    updateRelationships(parent, relationship, records) {
        // https://jsonapi.org/format/#crud-updating-to-many-relationships
        const requestData = { data: records };
        return this.api
            .patch(
                `${parent.type}/${parent.id}/relationships/${relationship}`,
                requestData,
            )
            .then(extractData)
            .catch(extractErrorResponse);
    }

    createRelationships(parent, relationship, records) {
        // https://jsonapi.org/format/#crud-updating-to-many-relationships
        const requestData = { data: records };
        return this.api
            .post(
                `${parent.type}/${parent.id}/relationships/${relationship}`,
                requestData,
            )
            .then(extractData)
            .catch(extractErrorResponse);
    }

    removeRelationships(parent, relationship, records) {
        // https://jsonapi.org/format/#crud-updating-to-many-relationships
        const requestData = { data: records };
        return this.api
            .delete(
                `${parent.type}/${parent.id}/relationships/${relationship}`,
                requestData,
            )
            .then(extractData)
            .catch(extractErrorResponse);
    }

    update(record) {
        // http://jsonapi.org/faq/#wheres-put
        const requestData = { data: record };
        return this.api
            .patch(`${this.name}/${record.id}`, requestData)
            .then(extractData)
            .catch(extractErrorResponse);
    }

    delete({ id }) {
        return this.api.delete(`${this.name}/${id}`).catch(extractErrorResponse);
    }
}

export default Resource;