fvtt-cthulhu-eternal/module/utils.mjs

export class CthulhuEternalUtils {

  static registerSettings() {
    game.settings.register("fvtt-cthulhu-eternal", "settings-era", {
      name: game.i18n.localize("CHTUHLUETERNAL.Settings.era"),
      hint: game.i18n.localize("CHTUHLUETERNAL.Settings.eraHint"),
      default: true,
      scope: "world",
      type: String,
      choices: SYSTEM.AVAILABLE_SETTINGS,
      config: true,
      onChange: _ => window.location.reload()
    });
  }

  static registerHandlebarsHelpers() {

    Handlebars.registerHelper('isNull', function (val) {
      return val == null;
    });

    Handlebars.registerHelper('exists', function (val) {
      return val != null && val !== undefined;
    });

    Handlebars.registerHelper('isEmpty', function (list) {
      if (list) return list.length === 0;
      else return false;
    });

    Handlebars.registerHelper('notEmpty', function (list) {
      return list.length > 0;
    });

    Handlebars.registerHelper('isNegativeOrNull', function (val) {
      return val <= 0;
    });

    Handlebars.registerHelper('isNegative', function (val) {
      return val < 0;
    });

    Handlebars.registerHelper('isPositive', function (val) {
      return val > 0;
    });

    Handlebars.registerHelper('equals', function (val1, val2) {
      return val1 === val2;
    });

    Handlebars.registerHelper('neq', function (val1, val2) {
      return val1 !== val2;
    });

    Handlebars.registerHelper('gt', function (val1, val2) {
      return val1 > val2;
    })

    Handlebars.registerHelper('lt', function (val1, val2) {
      return val1 < val2;
    })

    Handlebars.registerHelper('gte', function (val1, val2) {
      return val1 >= val2;
    })

    Handlebars.registerHelper('lte', function (val1, val2) {
      return val1 <= val2;
    })
    Handlebars.registerHelper('and', function (val1, val2) {
      return val1 && val2;
    })
    Handlebars.registerHelper('or', function (val1, val2) {
      return val1 || val2;
    })

    Handlebars.registerHelper('or3', function (val1, val2, val3) {
      return val1 || val2 || val3;
    })

    Handlebars.registerHelper('for', function (from, to, incr, block) {
      let accum = '';
      for (let i = from; i < to; i += incr)
        accum += block.fn(i);
      return accum;
    })

    Handlebars.registerHelper('not', function (cond) {
      return !cond;
    })
    Handlebars.registerHelper('count', function (list) {
      return list.length;
    })
    Handlebars.registerHelper('countKeys', function (obj) {
      return Object.keys(obj).length;
    })

    Handlebars.registerHelper('isEnabled', function (configKey) {
      return game.settings.get("bol", configKey);
    })
    Handlebars.registerHelper('split', function (str, separator, keep) {
      return str.split(separator)[keep];
    })

    // If you need to add Handlebars helpers, here are a few useful examples:
    Handlebars.registerHelper('concat', function () {
      let outStr = '';
      for (let arg in arguments) {
        if (typeof arguments[arg] != 'object') {
          outStr += arguments[arg];
        }
      }
      return outStr;
    })

    Handlebars.registerHelper('add', function (a, b) {
      return parseInt(a) + parseInt(b);
    });
    Handlebars.registerHelper('mul', function (a, b) {
      return parseInt(a) * parseInt(b);
    })
    Handlebars.registerHelper('sub', function (a, b) {
      return parseInt(a) - parseInt(b);
    })
    Handlebars.registerHelper('abbrev2', function (a) {
      return a.substring(0, 2);
    })
    Handlebars.registerHelper('abbrev3', function (a) {
      return a.substring(0, 3);
    })
    Handlebars.registerHelper('valueAtIndex', function (arr, idx) {
      return arr[idx];
    })
    Handlebars.registerHelper('includesKey', function (items, type, key) {
      return items.filter(i => i.type === type).map(i => i.system.key).includes(key);
    })
    Handlebars.registerHelper('includes', function (array, val) {
      return array.includes(val);
    })
    Handlebars.registerHelper('eval', function (expr) {
      return eval(expr);
    })
    Handlebars.registerHelper('isOwnerOrGM', function (actor) {
      console.log("Testing actor", actor.isOwner, game.userId)
      return actor.isOwner || game.isGM;
    })
    Handlebars.registerHelper('upperFirst', function (text) {
      if (typeof text !== 'string') return text
      return text.charAt(0).toUpperCase() + text.slice(1)
    })
    Handlebars.registerHelper('upperFirstOnly', function (text) {
      if (typeof text !== 'string') return text
      return text.charAt(0).toUpperCase()
    })
    Handlebars.registerHelper('isCreature', function (key) {
      return key === "creature" || key === "daemon";
    })

    // Handle v12 removal of this helper
    Handlebars.registerHelper('select', function (selected, options) {
      const escapedValue = RegExp.escape(Handlebars.escapeExpression(selected));
      const rgx = new RegExp(' value=[\"\']' + escapedValue + '[\"\']');
      const html = options.fn(this);
      return html.replace(rgx, "$& selected");
    });

  }

  static setupCSSRootVariables() {
    const era = game.settings.get("fvtt-cthulhu-eternal", "settings-era") 
    
    let eraCSS = SYSTEM.ERA_CSS[era];
    if (!eraCSS) eraCSS = SYSTEM.ERA_CSS["jazz"];

    document.documentElement.style.setProperty('--font-primary', eraCSS.primaryFont);
    document.documentElement.style.setProperty('--font-secondary', eraCSS.secondaryFont);
    document.documentElement.style.setProperty('--font-title',  eraCSS.titleFont);
    document.documentElement.style.setProperty('--img-icon-color-filter', eraCSS.imgFilter);
  }

}