jquery.hashcash.io.min.js

(function($){var defaultHashcashUrl=window.HashcashIOUrl||"https://hashcash.io";var hashcash,hashcashReady;if(!window.HashcashIO){var clientApiUrl=defaultHashcashUrl+"/js/libs/pow/pow.client.min.js";if(window.require){require([clientApiUrl],createHascashInstance)}else{loadScript(clientApiUrl,createHascashInstance)}}else{createHascashInstance()}function createHascashInstance(){hashcash=new HashcashIO({hashcashUrl:defaultHashcashUrl,readyCb:function(){hashcashReady=true}})}var guid=function(){function s4(){return Math.floor((1+Math.random())*65536).toString(16).substring(1)}return function(){return s4()+s4()+"-"+s4()+"-"+s4()+"-"+s4()+"-"+s4()+s4()+s4()}}();$.fn.hashcash=function(options){var settings=$.extend(true,{autoId:true,id:guid(),complexity:.01,key:null,beforeCb:null,progressCb:null,doneCb:null,targetEl:null,formEl:null,hashcashInputName:"hashcashid",lang:{screenreader_notice:"Click this to unlock submit button",screenreader_notice_done:"Form unlocked. Please submit this form.",screenreader_computing:"Please wait while computing.",screenreader_computed:"Form is ready. Please submit this form.",screenreader_done:"__done__% done.",popup_info:"Please unlock it first."}},options);return this.each(function(){var $el=$(this);if(!settings.key){throw new Error("Hashcash.IO key is required. Get it at https://hashcash.io")}var $form;if(!settings.formEl){$form=$el.parents("form").eq(0)}else{$form=$(settings.formEl)}if(!$form){throw new Error("Hashcash plugin requires button to be with in <form> element.")}if(settings.beforeCb){settings.beforeCb.apply($el)}var $switch=$form.find(".hashcash-onoffswitch");if($switch.length<1){$switch=$('<a href="#" class="hashcash-onoffswitch">'+'  <span class="hashcash-screenreader hashcash-screenreader-notice">'+settings.lang.screenreader_notice+"</span>"+'  <input type="checkbox" name="hashcash-onoffswitch" class="hashcash-onoffswitch-checkbox" id="hashcash-switch">'+'  <label class="hashcash-onoffswitch-label" for="hashcash-switch">'+'    <span class="hashcash-onoffswitch-inner"></span>'+'    <span class="hashcash-onoffswitch-switch"></span>'+"  </label>"+'  <div class="hashcash-info">'+settings.lang.popup_info+"</div>"+'  <div class="hashcash-screenreader hashcash-screenreader-notification" aria-live="assertive"></div>'+"</a>");if(settings.targetEl){var $container=$(settings.targetEl);$container.append($switch)}else{$el.before($switch)}}var $hashcashField=$form.find('input[name="'+settings.hashcashInputName+'"]');var id=settings.id;if($hashcashField.length<1){$hashcashField=$('<input type="hidden" name="'+settings.hashcashInputName+'" />');$form.append($hashcashField)}if($hashcashField.val()&&!$switch.hasClass("hashcash-computed")||!settings.autoId){id=$hashcashField.val()}else{$hashcashField.val(id)}$switch.removeClass("hashcash-computed").find("input").removeAttr("checked");$switch.find("hashcash-screenreader-notice").text(settings.lang.screenreader_notice);$switch.find(".hashcash-screenreader-notification").empty();var currentProgress=0;var progressCb=function(totalDone){var percentage=totalDone/settings.complexity*100;if(percentage>100){percentage=100}if(percentage<currentProgress){return}currentProgress=percentage;$switch.find(".hashcash-onoffswitch-inner").css({marginLeft:"-"+(100-percentage)+"%"});if(currentProgress>0){notifyWaiAria(settings.lang.screenreader_done.replace("__done__",Math.floor(currentProgress)))}};$el.addClass("hashcash-disabled").click(function(e){if($el.hasClass("hashcash-disabled")&&!$switch.hasClass("hashcash-computing")){$switch.addClass("hashcash-show-info");$switch.focus();notifyWaiAria(settings.lang.screenreader_notice);e.preventDefault();return}});$form.submit(function(e){if($el.hasClass("hashcash-disabled")){e.preventDefault()}});progressCb(0);$switch.one("click",function(){notifyWaiAria(settings.lang.screenreader_computing);$switch.addClass("hashcash-computing").removeClass("hashcash-show-info");if(!hashcashReady){var i=setInterval(function(){if(hashcashReady){clearInterval(i);applyHashcash()}},100)}else{applyHashcash()}progressCb(settings.Computing*.1)});$switch.click(function(e){return e.preventDefault()});function applyHashcash(){hashcash.calculate({publicKey:settings.key,id:id,limit:settings.complexity,done:function(){$switch.removeClass("hashcash-computing").addClass("hashcash-computed");$el.removeClass("hashcash-disabled").removeAttr("disabled");if(settings.doneCb){settings.doneCb.apply($el)}$switch.find("input").attr("checked",true);$switch.find("hashcash-screenreader-notice").text(settings.lang.screenreader_notice_done);notifyWaiAria(settings.lang.screenreader_computed)},progress:function(totalDone){progressCb(totalDone);if(settings.progressCb){settings.progressCb.apply($el,[totalDone])}}})}function notifyWaiAria(message){$switch.find(".hashcash-screenreader-notification").append("<span>"+message+"</span>")}})};function loadScript(url,callback){var script=document.createElement("script");script.type="text/javascript";if(script.readyState){script.onreadystatechange=function(){if(script.readyState=="loaded"||script.readyState=="complete"){script.onreadystatechange=null;callback()}}}else{script.onload=function(){callback()}}script.src=url;document.getElementsByTagName("head")[0].appendChild(script)}})(jQuery);