var path = require("path"), _ = require("underscore"), fs = require("fs"); module.exports = function(themes) { if (!themes || !_.keys(_.omit(themes, "default")).length) { return console.warn("No themes found in settings/themes.json. See https://github.com/nypublicradio/audiogram/blob/master/THEMES.md for details."); } for (var key in themes) { if (key !== "default") { validateTheme(key, _.extend({}, themes.default || {}, themes[key])); } } return themes; }; function validateTheme(name, options) { var fullBackgroundImagePath; if (!options || !_.keys(options).length) { return console.warn("Theme '" + name + "' is not defined."); } ["width", "height", "framesPerSecond", "samplesPerFrame"].forEach(function(key){ if (typeof options[key] !== "number") { console.warn("The required property '" + key +"' is missing from theme '" + name + "' or invalid."); } }); if (typeof options.backgroundImage === "string") { fullBackgroundImagePath = options.backgroundImage; if (!path.isAbsolute(options.backgroundImage)) { fullBackgroundImagePath = path.join(__dirname, "..", "..", "settings/backgrounds/", options.backgroundImage); } try { fs.accessSync(fullBackgroundImagePath); } catch(e) { console.warn("Background image for theme '" + name + "' (" + fullBackgroundImagePath + ") does not exist or is not readable."); } } }