export class Exception {

constructor (message, transition, from, to, current) {

this.message = message;

this.transition = transition;

this.from = from;

this.to = to;

this.current = current;

}

}

export function camelize(label) {

if (label.length === 0) {

return label;

}

let words = label.split(/[_-]/);

// single word with first character already lowercase, return untouched

if ((words.length === 1) && (words[0][0].toLowerCase() === words[0][0])) {

return label;

}

let result = words[0].toLowerCase();

for (let word of words.slice(1)) {

result += word.charAt(0).toUpperCase() + word.substring(1).toLowerCase();

}

return result;

}

export function prepend(prepend, label) {

label = camelize(label);

return prepend + label[0].toUpperCase() + label.substring(1);

}

export function hook(fsm, name, additional) {

let plugins = fsm.config.plugins;

let args = [fsm.context];

if (additional) {

args = args.concat(additional);

}

for (let plugin of plugins) {

let method = plugin[name];

if (method) {

method.apply(plugin, args);

}

}

}