git ssb

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function Year(letnice)
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{
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  let base = document.getElementById("center");
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  base.innerHTML = "";
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  let year;
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  isNaN(letnice) || letnice==null ? year = new Date().getFullYear() : year = String(letnice).replace("#", "").substr(0,4);
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  location.hash = year;
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  const monthNames = [ "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" ];
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  const dayNames = [ "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday",  "Sunday" ]
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  let month = 0;
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  let today = new Date(new Date().getFullYear(), new Date().getMonth(), new Date().getDate()-1, 0);
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  let style = "";
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  base.innerHTML += doHeader();
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  while(month < 12)
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  {
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    base.innerHTML += `<div class="month">
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      <p class="m">${monthNames[new Date(year, month).getMonth()].substr(0,2)}</p>
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      <svg class="graph" id="${monthNames[month]}">
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      ${doLabels()}
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      ${doMonth(month)}
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      </svg></div>`
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    month++
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  }
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  function doHeader()
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  {
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    return `<div class="header"><p class="y">${year}<a onclick="scrollYear(-1);">-</a><a onclick="scrollYear(1);">+</a></p><p class="p">${yearProgress(year) + "%"}</p></div>`;
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  }
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  function yearProgress(year)
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  {
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    progress = new Date() - new Date(year, 0, 1, 0);
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    return ((progress/31536000000)*100).toFixed(2);
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  }
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  function doLabels()
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  {
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    let html = "";
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    let y = 0;
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    for(i = 0; i < 7; i++)
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    {
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      y = (i * 14) + 1;
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      html += `<text class="dayLabel" x="5" y='${y}' dy="10">${dayNames[i].substr(0,1)}</text>`
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    }
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    return html;
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  }
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  function doMonth(month)
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  {
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    html = "";
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    monthLength = new Date(year, month+1, 0).getDate();
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    let date = 0;
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    let x = 0;
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    let y = 0;
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    while(date < monthLength)
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    {
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      x += 14;
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      let week = 0;
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      while(week < 7 && date != monthLength)
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      {
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        y = week * 14 + 2;
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        let day = new Date(year, month, date, 0);
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        if(day.getDay() != week)
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        {
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          style = "null";
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          date--
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        }
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        else if(day < today)
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        {
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          style = "gone";
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        }
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        else if(day.getDay() == 5 || day.getDay() == 6)
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        {
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          style = "weekend";
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        }
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        else if(String(day) == String(today))
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        {
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          style = "today";
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        }
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        else
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        {
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          style = "day";
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        }
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        html += `<rect class='${style}' x='${x}' y='${y}' title='${(date+1) == 0 ? "null" : dayNames[week] + " " + (date+1)}' width="12px" height="12px" rx="2" ry="2" onclick=""></rect>`
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        week++
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        date++
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      }
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    }
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    return html;
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  }
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}
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function scrollYear(i)
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{
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  location.hash = parseInt(location.hash.replace('#','')) + parseInt(i);
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}
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window.onhashchange = function()
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{
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  Year(parseInt(location.hash.replace('#','')));
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}