kata.html

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    <title>Architectural Katas: Practicing Architecture</title>
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    <div class="container-fluid">
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        <div class="span9">
          <div class="hero-unit">
            <h2>Your Architectural Kata is...</h2>
            <h1 id="kata-title"></h1>
            <p id="kata-text"></p>
            <p />
            <p id="bookmark-url"></p>
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        <p>&copy; Neward &amp; Associates 2012</p>
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    <!-- Le javascript
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    <!-- Placed at the end of the document so the pages load faster -->
    <script src="./js/jquery.js"></script>
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    <script src="./js/urlvars.js"></script>
    
    <script>
    // Github REST API has one endpoint I care about: getContents
    // (documented at https://developer.github.com/v3/repos/contents/)
    var githubSrcBase = 'https://api.github.com/repos/tedneward/ArchKatas/contents/'

    // These functions require definition before use because browser
    var fetchKata = function(filename) {
      console.log('fetchKata(', filename, ')');
      fetch(githubSrcBase + filename, {
        headers: {
          // must send media type "application/vnd.github.VERSION.raw"
          // to get contents in non-Base64-encoded format; while I could
          // convert it, why bother if GH can give it to me raw?
          Accept: "application/vnd.github.v3.raw"
        }
      })
        .then(response => response.json())
        .then(json => {
          console.log("fetchKata", json);
          $('#kata-title').text(json.title);
          json.description.forEach( (item) => {
            $('#kata-text').append('<p>' + item + '</p>');
          });
          $('#bookmark-url').html('<a target="_blank" href="kata.html?kata=' + filename + '">Bookmark or click this to save your kata choice</a>');
        });
    };
    var fetchKataList = function(listFn) {
      console.log('Fetching all katas...');
      fetch(githubSrcBase)
        .then(response => response.json())
        .then(json => {
          var jsons = json.filter( 
            (item) => (item.type === 'file') && 
            (item.name.endsWith('.json')));
          listFn(jsons);
        });
    };

    var kataname = $.getUrlVar('kata');
    if (kataname === 'all') {
      // Fetch a full list of katas from the repo
      // and put each one, linked, in a display
      fetchKataList(function(jsons) {
        $('#kata-title').text("All Katas")
        jsons.forEach( (kata) => {
          console.log("Building out link for ", kata);
          let file = kata.path;
          let name = kata.path.substring(0, kata.path.length - (".json".length));
          $('#kata-text').append('<p><a href="kata.html?kata=' + file + '">' + name + '</a></p>');
        });
      });
    }
    else if (kataname !== undefined) {
      // We want a specific kata; we assume it exists already
      fetchKata(kataname);
    }
    else {
      // Fetch a full list of katas from the repo
      // and pick one at random to fetch individually
      fetchKataList(function(jsons) {
        // Pick one at random
        var getRandomInt = function(max) {
          return Math.floor(Math.random() * Math.floor(max));
        };
        console.log("Choosing kata from among", jsons.length, "choices....");
        var choice = getRandomInt(jsons.length);
        console.log("Chose", choice, "! That's", jsons[choice].name);
        fetchKata(jsons[choice].name);
      });
    }
    </script>

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