Support talks iCal output

content/talks/_index.cs.md

@@ -11,6 +11,10 @@ menu:
   landing:
     weight: 4
     title: "<patek-logo title='Talks' subtitle='Pátek'>Talks</patek-logo>"
+cascade:
+  outputs:
+    - HTML
+    - Calendar
 ---
 Dle známého českého přísloví *„Kdo umí, umí, kdo neumí, učí.“* si členové, kteří vědí něco, co ostatní neví, připravují jednou za čas přednášky o tématech, která jim připadají zajímavá. Vzhledem k tomu, že většina starších členů Pátku jsou skalní informatici, se většina přednášek ubírá tímto směrem, avšak kdo má odvahu, může se jim postavit se svým tématem.  
 

content/talks/_index.en.md

@@ -11,6 +11,10 @@ menu:
   landing:
     weight: 4
     title: "<patek-logo title='Talks' subtitle='Pátek'>Talks</patek-logo>"
+cascade:
+  outputs:
+    - HTML
+    - Calendar
 ---
 In the spirit of a known Czech saying, that can be roughly translated to *"Who is good at something does it, who is bad at something teaches it."* students, who know something the others don't, prepare talks about topics they consider interesting. Because most members are conservative computer scientists, most these talks follow this direction, but if there is anyone brave enough, they can stand up to them with their topics. 
 

themes/patek/assets/css/main.scss

@@ -316,6 +316,12 @@ patek-logo {
   // To make the color constrast enought with white to pass the WCAG AA requirements
   color: #737373 !important;
 }
+
+.rel-alternate-buttons {
+  display: flex;
+  flex-direction: row-reverse;
+}
+
 // /Custom styles
 
 .patek-logo-top {

themes/patek/layouts/partials/icalEscape.ics

@@ -0,0 +1,18 @@
+{{- /* Note this file has CRLF line endings as required by the specs */ -}}
+{{- /* replace does not support piping */ -}}
+{{- $escaped := replace (replace (replace (replace . "\\" "\\\\") "\n" "\\n") "," "\\,") ";" "\\;" -}}
+{{- $escapedLen := strings.RuneCount $escaped -}}
+{{- $lineLen := 60 -}}
+{{- $parts := (div $escapedLen $lineLen) -}}
+{{- if (not (modBool $escapedLen $lineLen)) -}}
+	{{- $parts = (add $parts 1) -}}
+{{- end -}}
+
+{{- /* print the string by parts of at most 75 chars as required by the specs */ -}}
+{{- range (seq (sub $parts 0)) -}}
+{{- if (eq . 1) -}}
+{{- substr $escaped (mul (sub . 1) $lineLen) $lineLen -}}
+{{- else }}{{- /* the leading whitespace is important here */}}
+	{{ substr $escaped (mul (sub . 1) $lineLen) $lineLen -}}
+{{- end -}}
+{{- end -}}

themes/patek/layouts/partials/talkIcal.ics

@@ -0,0 +1,14 @@
+{{- /* Note this file has CRLF line endings as required by the specs */ -}}
+BEGIN:VEVENT
+UID:{{ partial "icalEscape.ics" .Permalink }}
+CREATED:{{ dateFormat "20060102T150405Z" .Date.UTC }}
+DTSTAMP:{{ dateFormat "20060102T150405Z" (now).UTC }}
+SUMMARY:{{ .Title | plainify | partial "icalEscape.ics" }}
+DESCRIPTION:{{ printf "%s %s" (.Content | plainify | truncate 200) .Permalink | partial "icalEscape.ics" }}
+DTSTART:{{ dateFormat "20060102T150405Z" (time .Params.When).UTC }}
+DTEND:{{ $length := 30 -}}
+{{- with .Params.Length -}}
+{{ $length = (int .) }}
+{{- end -}}
+{{- dateFormat "20060102T150405Z" (time (add (time .Params.When).Unix (mul $length 60))).UTC }}
+END:VEVENT

themes/patek/layouts/partials/talksPageHeader.html

@@ -1,7 +1,7 @@
 <div class="pageHeader">
     <h2 class="title pageTitle"><a href="{{ .Permalink }}">{{ .Title }}</a></h2>
     <p class="has-text-grey">{{- T "published" -}}:&nbsp;<time datetime="{{ .PublishDate.Format "2006-01-02T15:04:05.000-0700" }}">{{ .PublishDate.Format "02.01.2006 15:04" }}</time></p>
-    <p class="">{{- T "talks-when" -}}:&nbsp;<time datetime="{{ dateFormat "2006-01-02T15:04:05.000-0700" .Params.when }}">{{ dateFormat "02.01.2006 15:04" .Params.when }}</time></p>
+    <p class="">{{- T "talks-when" -}}:&nbsp;<time datetime="{{ dateFormat "2006-01-02T15:04:05.000-0700" .Params.when }}">{{ dateFormat "02.01.2006 15:04" .Params.when }}</time> <a rel="alternate" href="{{ (.OutputFormats.Get "Calendar").Permalink | safeURL }}"><span class="icon"><i class="fas fa-calendar-alt"></i></span></a></p>
     <p class="">
         {{- T "presenter" -}}: {{ range .Params.authors }}{{ with $.Site.GetPage (printf "authors/%s" .) }}<a class="separateWithCommas" href="{{ .Permalink }}">{{ .Title }}</a>{{ end }}{{ end }}
     </p>

themes/patek/layouts/talks/list.html

@@ -6,7 +6,12 @@
     <h3 class="title">{{ T "talks-paginator-heading" }}:</h3>
     {{ $baseUrl := .Site.BaseURL }}
     {{ $paginator := .Paginate ((.Pages.ByParam "when").Reverse) }}
-    {{ partial "paginator-buttons.html" $paginator }}
+    <div class="is-flex" style="justify-content: space-between;">
+      {{ partial "paginator-buttons.html" $paginator }}
+      <div class="rel-alternate-buttons">
+        <a rel="alternate" href="{{ (.OutputFormats.Get "Calendar").Permalink | safeURL }}"><span class="icon is-medium"><i class="fas fa-2x fa-calendar-alt"></i></span></a>
+      </div>
+    </div>
     {{ range $paginator.Pages }}
         <div class="box">
             <div class="pageHeaderContainer">

themes/patek/layouts/talks/section.ics

@@ -0,0 +1,9 @@
+{{- /* Note this file has CRLF line endings as required by the specs */ -}}
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:gohugo
+CALSCALE:GREGORIAN
+{{ range .RegularPages -}}
+{{ partial "talkIcal.ics" . -}}
+{{- end -}}
+END:VCALENDAR

themes/patek/layouts/talks/single.ics

@@ -0,0 +1,7 @@
+{{- /* Note this file has CRLF line endings as required by the specs */ -}}
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:gohugo
+CALSCALE:GREGORIAN
+{{ partial "talkIcal.ics" . -}}
+END:VCALENDAR