jefklakscodex/themes/jefklak-creative-portfolio/layouts/partials/sidebar.html

<nav class="sidebar sidebar-offcanvas">
  <div class="sidebar-content sidebar-scrolling">
    <h1 class="sidebar-heading"><a href="{{ .Site.BaseURL }}" title="{{ .Site.Title }} Home">{{ .Site.Title }}</a></h1>

    {{ $thumb := "" }}
    {{ if .Params.image }}
      {{ $thumb = .Params.image }}
    {{ else }}
      {{ if .Params.howlongtobeat_id }}
        {{ $thumb = printf "%s%d%s" "/img/hltb/" .Params.howlongtobeat_id ".jpg" }}
      {{ end }}
    {{ end }}
    {{ if ne $thumb "" }}
      <div class="sidebar-game-info">
        <p style="position: relative;">
        <img src="{{ $thumb }}" alt="game cover image" alt="game cover" class="img-responsive img-inactive" style="border: 1px solid black"/>

        {{ if ne .CurrentSection.Params.platform .Params.platform }}
          {{ $platform := .CurrentSection.Title }}
          {{ with .CurrentSection.Params.platform }}
            <img src="/img/{{ lower . }}.jpg" alt="{{ $platform }}" alt="platform" class="sidebar-game-platform img-responsive"/>
            &nbsp;Played on: <a href="/games/{{ lower . }}">{{ $platform }}</a><br/>
          {{ end }}
        {{ end }}

        {{ with .Params.game_genre }}
          {{ $tag := replaceRE `\s` "-" . }}
          &nbsp;Genre: <a href="/tags/{{ $tag | lower }}">{{ . }}</a><br/>
        {{ end }}
        {{ with .Params.game_release_year }}
          &nbsp;Release year: {{ . }}<br/>
        {{ end }}
        {{ with .Params.game_developer }}
          &nbsp;Developer: <a href="https://www.mobygames.com/search/quick?sFilter=1&offset=0&q={{ . }}&p=-1&sC=on" target="_blank" rel="noopener" class="external">{{ . }}</a><br/>
        {{ end }}
        {{ with .Params.howlongtobeat_id }}
          &nbsp;<a href="https://howlongtobeat.com/game?id={{ . }}" target="_blank" rel="noopener" class="external">How long to beat</a>
        {{ end }}
       {{ with .Params.howlongtobeat_hrs }}
          : <code>{{ . }}</code> hr{{ if gt . 1}}s{{ end }}<br/>
        {{ end }}
        </p>
      </div>
    {{ end }}


    {{ $currRellink := substr .RelPermalink 0 -1 }}
    {{ $currContent := .Content }}
    {{ $backlinks := slice }}
    {{ $forwardlinks := slice }}
    {{ range (where (where .Site.Pages.ByDate.Reverse ".Section" "in" (slice "articles" "games")) ".Params.ignore" "!=" "true") }}
        {{ $found := findRE $currRellink .Content 1 }}
        {{ if $found }}
          {{ $backlinks = $backlinks | append . }}
        {{ else }}
          {{ $rellink := substr .RelPermalink 0 -1 }}
          {{ $found = findRE $rellink $currContent 1 }}   
          {{ if $found }}
            {{ $forwardlinks = $forwardlinks | append . }}
          {{ end }}
        {{ end }}
    {{ end }}

    {{ $related := append $backlinks $forwardlinks }}
    {{ if and .Params.Date $related }}
      <div class="sidebar-header">
        <span>Related Posts</span>
        <img src="/img/gob_purse.gif" alt="related articles" />
      </div>

        <ul class="sidebar-menu">
        {{ range first 5 $related }}
          <li>
            <a href="{{ .RelPermalink }}">{{ .Title }}</a><br/>
            <span class="sidebar-date">
              {{ if isset .Params "Description" }}
                {{ .Description }}
              {{ else }}
                {{ .Summary }}
              {{ end }}
            </span>
          </li>
        {{ end }}
      </ul>
      <hr/>
    {{ end }}

    <div class="sidebar-header">
      <span>Recent Codex Entries</span>
      <img src="/img/gob_letter.gif" alt="latest articles" />
    </div>
    <ul class="sidebar-menu">
      {{ range first 5 (where (where .Site.Pages.ByDate.Reverse ".Section" "in" (slice "articles" "games")) ".Params.ignore" "!=" "true") }}
          <li>
            <a href="{{ .RelPermalink }}">{{ .Title }}</a><br/>
            <span class="sidebar-date">
              {{ if .Description }}
                {{ .Description }}
              {{ else if .Summary }}
                {{ .Summary }}
              {{ else }}
                A {{ .Params.game_genre }} game by {{ .Params.game_developer }} in {{ .Params.game_release_year }} that takes about {{ .Params.howlongtobeat_hrs }} hour(s) to beat.
              {{ end }}
            </span>
          </li>
      {{ end }}
    </ul>

    <div class="sidebar-header">
      <span>Looking For More?</span>
      <img src="/img/gob_waypoint.gif" alt="More information" />
    </div>
    <ul class="sidebar-menu">
      {{ range .Site.Params.navlinks }}
        <li><a href="{{ .url }}">{{ .name }}</a></li>
      {{ end }}
    </ul>


    <div class="copyright">
      <p class="credit">
        {{ with .Site.Params.copyright }}
          {{ . | safeHTML }}
        {{ end }}
      </p>
    </div>
  </div>
</nav>