Gottwik/Enduro

// * ———————————————————————————————————————————————————————— * //
// *     project configurator
// *    reads the configuration file and sets the variables
// * ———————————————————————————————————————————————————————— * //
const enduro_configurator = function () {}

// * vendor dependencies
const Promise = require('bluebird')
const extend = require('extend')
const path = require('path')
const fs = Promise.promisifyAll(require('fs-extra'))

// * enduro dependencies
const flat_helpers = require(enduro.enduro_path + '/libs/flat_db/flat_helpers')
const default_configuration = require(enduro.enduro_path + '/libs/configuration/enduro_default_configuration.js')

// * ———————————————————————————————————————————————————————— * //
// *     read configurtion file
// *
// *    @return {promise} - empty promise
// * ———————————————————————————————————————————————————————— * //
enduro_configurator.prototype.read_config = function () {

    const CONFIG_PATH = enduro.project_path + '/enduro.json'
    const SECRET_CONFIG_PATH = enduro.project_path + '/enduro_secret.json'

    return Promise.all([
        read_config_file(CONFIG_PATH, default_configuration.default_configuration),
        read_config_file(SECRET_CONFIG_PATH, default_configuration.default_secret_configuration)
    ])
        .then(() => {

            // abstract/edit the just read configuration

            enduro.config.variables = {}
            enduro.config.variables.has_s3_setup = enduro.config.secret && enduro.config.secret.s3
            enduro.config.variables.S3_KEY = (enduro.config.variables.has_s3_setup && enduro.config.secret.s3.S3_KEY) || process.env.S3_KEY
            enduro.config.variables.S3_SECRET = (enduro.config.variables.has_s3_setup && enduro.config.secret.s3.S3_SECRET) || process.env.S3_SECRET

            enduro.config.variables.s3_enabled = (enduro.config.project_name && enduro.config.variables.S3_KEY && enduro.config.variables.S3_SECRET)

            // disable juicebox if there is nojuice flag
            if (enduro.flags.nojuice) {
                enduro.config.juicebox_enabled = false
            }

            // force enable meta context in cms files if juicebox is juicebox_enabled
            // juicebox is dependant on having time edited in the meta
            if (enduro.config.juicebox_enabled) {
                enduro.config.meta_context_enabled = true
            }

            // preselect s3 as remote filesystem once aws keys are inputted
            if (enduro.config.variables.s3_enabled) {
                enduro.config.filesystem = 's3'
            }

            // add empty culture that will always render the pages without any culture in the primary culture
            enduro.config.cultures.push('')

            return Promise.resolve(enduro.config)
        })
}

function read_config_file (config_file, default_config) {

    // check if file exists
    if (!flat_helpers.file_exists_sync(config_file)) {

        // uses default config if no configuration is specified
        enduro.config = extend(true, enduro.config, default_config)
        return new Promise.resolve()
    } else {

        // Reads the configuration file
        return fs.readFileAsync(config_file)
            .then((data) => {
                // Parses json file
                local_config = JSON.parse(data)

                // Extend loaded file with default configuration
                enduro.config = extend(true, enduro.config, default_config, local_config)
            })
    }
}

// this will extend current enduro.json config file with updated context
enduro_configurator.prototype.set_config = function (new_setup) {

    secret_setup = { secret: new_setup.secret }
    delete new_setup.secret

    // stores config paths
    const config_path = path.join(enduro.project_path, 'enduro.json')
    const secret_config_path = path.join(enduro.project_path, 'enduro_secret.json')

    // extends public config variable
    extend(true, enduro.config, new_setup)

    // extends and saves public config file
    const extend_public_config = extend_config(config_path, new_setup)
    const extend_secret_config = extend_config(secret_config_path, secret_setup)

    return Promise.all([
        extend_public_config,
        extend_secret_config
    ])
}

function extend_config (path, setup) {
    return fs.readJsonAsync(path)
        .then((data) => {
            extend(true, data, setup)
            return data
        }, () => {
            return setup
        })
        .then((config) => {
            return fs.outputJsonAsync(path, config, { spaces: '\t' })
        })
}

module.exports = new enduro_configurator()