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workout.js
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workout.js
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/**
*
*
* @author Jens Hassler
* @since 01/2016
*/
workouts = new Array();
timerId = null;
currentExercise = null;
currentExerciseNr = -1;
currentTimer = 0;
$(function() {
$('.startbutton').click(function() {
startWorkout(workouts[0]);
});
});
function startWorkout(workout) {
console.log("starting workout");
$('.startbutton').hide();
createDomElementsForWorkout(workout);
if (timerId) {
window.clearInterval(timerId);
}
nextExercise(workout);
$('.progress').show();
timerId = window.setInterval(function() {
workoutIteration(currentExercise);
currentTimer--;
if (currentTimer === 0) {
nextExercise(workout);
}
}, 1000);
}
function nextExercise(workout) {
currentExerciseNr++;
if (currentExerciseNr == workout.exercises.length) {
finishWorkout();
} else {
currentExercise = workout.exercises[currentExerciseNr];
currentTimer = currentExercise.duration;
$('.exercise').removeClass('current-exercise');
$('[data-nr=' + currentExerciseNr + ']').addClass('current-exercise');
console.log("starting next exercise");
console.log(currentExercise);
}
}
function workoutIteration(exercise) {
var remainingTime = secondsAsTime(currentTimer);
$('.timer').html(remainingTime);
var progressbar = $('.progress-bar');
progressbar.attr('aria-valuenow', currentTimer);
progressbar.attr('aria-valuemax', exercise.duration);
progressbar.css('width', currentTimer*100/exercise.duration + '%');
progressbar.html(remainingTime);
}
function str_pad_left(string,pad,length) {
return (new Array(length+1).join(pad)+string).slice(-length);
}
// convert seconds to minute:seconds format
function secondsAsTime(givenSeconds) {
var minutes = Math.floor(givenSeconds / 60);
var seconds = givenSeconds - (minutes * 60);
var finalTime = minutes.toString() + ':' + str_pad_left(seconds,'0',2);
return finalTime;
}
function finishWorkout() {
if (timerId) {
window.clearInterval(timerId);
}
$('.startbutton').show();
$('.progress').hide();
$('.exercise').removeClass('current-exercise');
currentExerciseNr=-1;
console.log("workout finished");
}
function createDomElementsForWorkout(workout) {
var n = 0;
var t=0;
$('.current_workout').empty();
workout.exercises.forEach(function(exercise) {
$('.current_workout').append('<div class="exercise" data-nr="' + n + '" data-duration="' + exercise.duration + '">' + exercise.exercise + ' (' + secondsAsTime(exercise.duration) + ')' + '</div>' );
var times = 1;
if (exercise.restartEvery){
times = Math.round(exercise.duration/exercise.restartEvery);
}
for (var j=0;j<times;j++){
var x = exercise.restartEvery || 0;
setTimeout(function(){
if (x){
//using an ugly workaround to assert that the audio can be restarted again, even if it is slightly longer, by adapting the playback rate
exercise.audio.playbackRate = (exercise.audio.duration)/x+0.02;
}
exercise.audio.play();
},(t+1+j*x)*1000);
}
t+=exercise.duration;
n++;
});
}