Allow customizing Social-Media Share buttons

Usage (site as well as fron-matter) =>
    - `ShareButtons: ["linkedin", "twitter"]`
    - must be a list `[]`

closes: #431

layouts/partials/share_icons.html

@@ -4,12 +4,17 @@
 {{- $.Scratch.Set "tags" ""}}
 
 {{- with .Params.Tags }}
-{{ $hashtags := newScratch}}
+{{- $hashtags := newScratch}}
 {{- range . }}{{ $hashtags.Add "tags" (slice (replaceRE "(\\s)" "" . ))}}{{end}}
 {{- $.Scratch.Set "tags" (delimit ($hashtags.Get "tags") ",") }}
 {{- end -}}
 
+{{- $custom := false }}
+{{- $ShareButtons := (.Param "ShareButtons")}}
+{{- with $ShareButtons }}{{ $custom = true }}{{ end }}
+
 <div class="share-buttons">
+    {{- if (cond ($custom) (in $ShareButtons "twitter") (true)) }}
     <a target="_blank" rel="noopener noreferrer" aria-label="share {{ $title | plainify }} on twitter"
         href="https://twitter.com/intent/tweet/?text={{ $title }}&amp;url={{ $pageurl }}&amp;hashtags={{- $.Scratch.Get "tags" -}}">
         <svg version="1.1" viewBox="0 0 512 512" xml:space="preserve">
@@ -17,6 +22,8 @@
                 d="M449.446,0c34.525,0 62.554,28.03 62.554,62.554l0,386.892c0,34.524 -28.03,62.554 -62.554,62.554l-386.892,0c-34.524,0 -62.554,-28.03 -62.554,-62.554l0,-386.892c0,-34.524 28.029,-62.554 62.554,-62.554l386.892,0Zm-253.927,424.544c135.939,0 210.268,-112.643 210.268,-210.268c0,-3.218 0,-6.437 -0.153,-9.502c14.406,-10.421 26.973,-23.448 36.935,-38.314c-13.18,5.824 -27.433,9.809 -42.452,11.648c15.326,-9.196 26.973,-23.602 32.49,-40.92c-14.252,8.429 -30.038,14.56 -46.896,17.931c-13.487,-14.406 -32.644,-23.295 -53.946,-23.295c-40.767,0 -73.87,33.104 -73.87,73.87c0,5.824 0.613,11.494 1.992,16.858c-61.456,-3.065 -115.862,-32.49 -152.337,-77.241c-6.284,10.881 -9.962,23.601 -9.962,37.088c0,25.594 13.027,48.276 32.95,61.456c-12.107,-0.307 -23.448,-3.678 -33.41,-9.196l0,0.92c0,35.862 25.441,65.594 59.311,72.49c-6.13,1.686 -12.72,2.606 -19.464,2.606c-4.751,0 -9.348,-0.46 -13.946,-1.38c9.349,29.426 36.628,50.728 68.965,51.341c-25.287,19.771 -57.164,31.571 -91.8,31.571c-5.977,0 -11.801,-0.306 -17.625,-1.073c32.337,21.15 71.264,33.41 112.95,33.41Z" />
         </svg>
     </a>
+    {{- end }}
+    {{- if (cond ($custom) (in $ShareButtons "linkedin") (true)) }}
     <a target="_blank" rel="noopener noreferrer" aria-label="share {{ $title | plainify }} on linkedin"
         href="https://www.linkedin.com/shareArticle?mini=true&amp;url={{ $pageurl }}&amp;title={{ $title }}&amp;summary={{ $title }}&amp;source={{ $pageurl }}">
         <svg version="1.1" viewBox="0 0 512 512" xml:space="preserve">
@@ -24,6 +31,8 @@
                 d="M449.446,0c34.525,0 62.554,28.03 62.554,62.554l0,386.892c0,34.524 -28.03,62.554 -62.554,62.554l-386.892,0c-34.524,0 -62.554,-28.03 -62.554,-62.554l0,-386.892c0,-34.524 28.029,-62.554 62.554,-62.554l386.892,0Zm-288.985,423.278l0,-225.717l-75.04,0l0,225.717l75.04,0Zm270.539,0l0,-129.439c0,-69.333 -37.018,-101.586 -86.381,-101.586c-39.804,0 -57.634,21.891 -67.617,37.266l0,-31.958l-75.021,0c0.995,21.181 0,225.717 0,225.717l75.02,0l0,-126.056c0,-6.748 0.486,-13.492 2.474,-18.315c5.414,-13.475 17.767,-27.434 38.494,-27.434c27.135,0 38.007,20.707 38.007,51.037l0,120.768l75.024,0Zm-307.552,-334.556c-25.674,0 -42.448,16.879 -42.448,39.002c0,21.658 16.264,39.002 41.455,39.002l0.484,0c26.165,0 42.452,-17.344 42.452,-39.002c-0.485,-22.092 -16.241,-38.954 -41.943,-39.002Z" />
         </svg>
     </a>
+    {{- end }}
+    {{- if (cond ($custom) (in $ShareButtons "reddit") (true)) }}
     <a target="_blank" rel="noopener noreferrer" aria-label="share {{ $title | plainify }} on reddit"
         href="https://reddit.com/submit?url={{ $pageurl }}&title={{ $title }}">
         <svg version="1.1" viewBox="0 0 512 512" xml:space="preserve">
@@ -31,6 +40,8 @@
                 d="M449.446,0c34.525,0 62.554,28.03 62.554,62.554l0,386.892c0,34.524 -28.03,62.554 -62.554,62.554l-386.892,0c-34.524,0 -62.554,-28.03 -62.554,-62.554l0,-386.892c0,-34.524 28.029,-62.554 62.554,-62.554l386.892,0Zm-3.446,265.638c0,-22.964 -18.616,-41.58 -41.58,-41.58c-11.211,0 -21.361,4.457 -28.841,11.666c-28.424,-20.508 -67.586,-33.757 -111.204,-35.278l18.941,-89.121l61.884,13.157c0.756,15.734 13.642,28.29 29.56,28.29c16.407,0 29.706,-13.299 29.706,-29.701c0,-16.403 -13.299,-29.702 -29.706,-29.702c-11.666,0 -21.657,6.792 -26.515,16.578l-69.105,-14.69c-1.922,-0.418 -3.939,-0.042 -5.585,1.036c-1.658,1.073 -2.811,2.761 -3.224,4.686l-21.152,99.438c-44.258,1.228 -84.046,14.494 -112.837,35.232c-7.468,-7.164 -17.589,-11.591 -28.757,-11.591c-22.965,0 -41.585,18.616 -41.585,41.58c0,16.896 10.095,31.41 24.568,37.918c-0.639,4.135 -0.99,8.328 -0.99,12.576c0,63.977 74.469,115.836 166.33,115.836c91.861,0 166.334,-51.859 166.334,-115.836c0,-4.218 -0.347,-8.387 -0.977,-12.493c14.564,-6.47 24.735,-21.034 24.735,-38.001Zm-119.474,108.193c-20.27,20.241 -59.115,21.816 -70.534,21.816c-11.428,0 -50.277,-1.575 -70.522,-21.82c-3.007,-3.008 -3.007,-7.882 0,-10.889c3.003,-2.999 7.882,-3.003 10.885,0c12.777,12.781 40.11,17.317 59.637,17.317c19.522,0 46.86,-4.536 59.657,-17.321c3.016,-2.999 7.886,-2.995 10.885,0.008c3.008,3.011 3.003,7.882 -0.008,10.889Zm-5.23,-48.781c-16.373,0 -29.701,-13.324 -29.701,-29.698c0,-16.381 13.328,-29.714 29.701,-29.714c16.378,0 29.706,13.333 29.706,29.714c0,16.374 -13.328,29.698 -29.706,29.698Zm-160.386,-29.702c0,-16.381 13.328,-29.71 29.714,-29.71c16.369,0 29.689,13.329 29.689,29.71c0,16.373 -13.32,29.693 -29.689,29.693c-16.386,0 -29.714,-13.32 -29.714,-29.693Z" />
         </svg>
     </a>
+    {{- end }}
+    {{- if (cond ($custom) (in $ShareButtons "facebook") (true)) }}
     <a target="_blank" rel="noopener noreferrer" aria-label="share {{ $title | plainify }} on facebook"
         href="https://facebook.com/sharer/sharer.php?u={{ $pageurl }}">
         <svg version="1.1" viewBox="0 0 512 512" xml:space="preserve">
@@ -38,6 +49,8 @@
                 d="M449.446,0c34.525,0 62.554,28.03 62.554,62.554l0,386.892c0,34.524 -28.03,62.554 -62.554,62.554l-106.468,0l0,-192.915l66.6,0l12.672,-82.621l-79.272,0l0,-53.617c0,-22.603 11.073,-44.636 46.58,-44.636l36.042,0l0,-70.34c0,0 -32.71,-5.582 -63.982,-5.582c-65.288,0 -107.96,39.569 -107.96,111.204l0,62.971l-72.573,0l0,82.621l72.573,0l0,192.915l-191.104,0c-34.524,0 -62.554,-28.03 -62.554,-62.554l0,-386.892c0,-34.524 28.029,-62.554 62.554,-62.554l386.892,0Z" />
         </svg>
     </a>
+    {{- end }}
+    {{- if (cond ($custom) (in $ShareButtons "whatsapp") (true)) }}
     <a target="_blank" rel="noopener noreferrer" aria-label="share {{ $title | plainify }} on whatsapp"
         href="https://api.whatsapp.com/send?text={{ $title }}%20-%20{{ $pageurl }}">
         <svg version="1.1" viewBox="0 0 512 512" xml:space="preserve">
@@ -45,6 +58,8 @@
                 d="M449.446,0c34.525,0 62.554,28.03 62.554,62.554l0,386.892c0,34.524 -28.03,62.554 -62.554,62.554l-386.892,0c-34.524,0 -62.554,-28.03 -62.554,-62.554l0,-386.892c0,-34.524 28.029,-62.554 62.554,-62.554l386.892,0Zm-58.673,127.703c-33.842,-33.881 -78.847,-52.548 -126.798,-52.568c-98.799,0 -179.21,80.405 -179.249,179.234c-0.013,31.593 8.241,62.428 23.927,89.612l-25.429,92.884l95.021,-24.925c26.181,14.28 55.659,21.807 85.658,21.816l0.074,0c98.789,0 179.206,-80.413 179.247,-179.243c0.018,-47.895 -18.61,-92.93 -52.451,-126.81Zm-126.797,275.782l-0.06,0c-26.734,-0.01 -52.954,-7.193 -75.828,-20.767l-5.441,-3.229l-56.386,14.792l15.05,-54.977l-3.542,-5.637c-14.913,-23.72 -22.791,-51.136 -22.779,-79.287c0.033,-82.142 66.867,-148.971 149.046,-148.971c39.793,0.014 77.199,15.531 105.329,43.692c28.128,28.16 43.609,65.592 43.594,105.4c-0.034,82.149 -66.866,148.983 -148.983,148.984Zm81.721,-111.581c-4.479,-2.242 -26.499,-13.075 -30.604,-14.571c-4.105,-1.495 -7.091,-2.241 -10.077,2.241c-2.986,4.483 -11.569,14.572 -14.182,17.562c-2.612,2.988 -5.225,3.364 -9.703,1.12c-4.479,-2.241 -18.91,-6.97 -36.017,-22.23c-13.314,-11.876 -22.304,-26.542 -24.916,-31.026c-2.612,-4.484 -0.279,-6.908 1.963,-9.14c2.016,-2.007 4.48,-5.232 6.719,-7.847c2.24,-2.615 2.986,-4.484 4.479,-7.472c1.493,-2.99 0.747,-5.604 -0.374,-7.846c-1.119,-2.241 -10.077,-24.288 -13.809,-33.256c-3.635,-8.733 -7.327,-7.55 -10.077,-7.688c-2.609,-0.13 -5.598,-0.158 -8.583,-0.158c-2.986,0 -7.839,1.121 -11.944,5.604c-4.105,4.484 -15.675,15.32 -15.675,37.364c0,22.046 16.048,43.342 18.287,46.332c2.24,2.99 31.582,48.227 76.511,67.627c10.685,4.615 19.028,7.371 25.533,9.434c10.728,3.41 20.492,2.929 28.209,1.775c8.605,-1.285 26.499,-10.833 30.231,-21.295c3.732,-10.464 3.732,-19.431 2.612,-21.298c-1.119,-1.869 -4.105,-2.99 -8.583,-5.232Z" />
         </svg>
     </a>
+    {{- end }}
+    {{- if (cond ($custom) (in $ShareButtons "telegram") (true)) }}
     <a target="_blank" rel="noopener noreferrer" aria-label="share {{ $title | plainify }} on telegram"
         href="https://telegram.me/share/url?text={{ $title }}&amp;url={{ $pageurl }}">
         <svg version="1.1" xml:space="preserve" viewBox="2 2 28 28">
@@ -52,4 +67,5 @@
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         </svg>
     </a>
+    {{- end }}
 </div>