calendar widget

diff --git a/index.cgi b/index.cgi
new file mode 100755 (executable)
index 0000000..48c9a79
--- /dev/null
+++ b/index.cgi
@@ -0,0 +1,100 @@
+#!/bin/sh
+
+_EXEC="${_EXEC:-${0%/*}/}"
+_DATA="${_DATA:-.}"
+
+. "$_EXEC"/cgilite/cgilite.sh
+#. "$_EXEC"/cgilite/session.sh
+. "$_EXEC"/cgilite/file.sh
+#. "$_EXEC"/session_lock.sh
+
+#git init "$_DATA" >/dev/null &
+
+checked(){
+  if [ "$1" = "$2" ] || [ "$1" -eq "$2" ]; then
+    printf 'checked="checked"'
+  fi 2>/dev/null
+}
+selected(){
+  if [ "$1" = "$2" ] || [ "$1" -eq "$2" ]; then
+    printf 'selected="selected"'
+  fi 2>/dev/null
+}
+
+yield_page(){
+  title="${1:-Webpoll}" page="$2"
+  printf '%s\r\n' 'Content-Type: text/html; charset=utf-8' \
+                  "Content-Security-Policy: script-src 'none'" \
+                  ''
+  { printf '[html
+    [head
+      [meta name="viewport" content="width=device-width"]
+      [link rel="stylesheet" type="text/css" href="common.css"]
+      [title %s]
+    ] [body class="%s"
+  ' "$title" "$page"
+  cat
+  printf '] ]'
+  } |"$_EXEC/cgilite/html-sh.sed" -u
+}
+
+w_month() {
+  local month="$1" selected="$2"
+  local dow dom days n=1 Y m d V w B
+  if [ $month ]; then
+    read Y m d V w B<<-EOF
+       $(date -d "${month}-01" +"%Y %m %d %V %w %B")
+       EOF
+  else
+    read Y m d V w <<-EOF
+       $(date +"%Y %m %d %V %w")
+       EOF
+    month="$Y-$m"
+    V="$((V - d / 7))"
+    [ $V -lt 1 ] && V=$((V + 53))
+  fi
+
+  case $m in
+    0[13578]|10|12)
+      days="1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31";;
+    0[469]|11)
+      days="1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30";;
+    02) if [ $(( Y / 400 )) = 0 ]; then
+        days="1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29";
+      elif [ $(( Y / 100 )) = 0 ]; then
+        days="1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28";
+      elif [ $(( Y /   4 )) = 0 ]; then
+        days="1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29";
+      else
+        days="1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28";
+      fi;;
+  esac
+
+  printf '[table .calendar month=%s [thead
+            [tr .monthname [th colspan=8 . %s]]
+            [tr   .weekday [th][th . %s][th . %s][th . %s][th . %s][th . %s][th . %s][th . %s]]
+          ][tbody
+         ' "$month" "$B $Y" Mo Di Mi Do Fr Sa So
+  for dom in $days; do
+    dow=$(( (w - d + 35 + dom ) % 7))
+    [ $dow = 1 -o $dom = 1 ] && printf '[tr [th .weekno . %i]' $V
+    [ $dom = 1 ] && while [ $n -lt $(( ($dow + 6) % 7 + 1)) ]; do printf '[td ]'; n=$((n + 1)); done
+    printf '[td [label [input type=radio name=date value="%04i-%02i-%02i" %s] %i]]' $Y $m $dom "$(checked $dom $selected)" $dom
+    [ $dow = 0 ] && printf ']\n'
+    [ $dow = 0 ] && V=$(( V % 53 + 1))
+  done
+  printf ']]'
+}
+
+case ${PATH_INFO##*/} in
+  favicon.ico) printf '%s\r\n' 'Content-Length: 0' '';;
+  common.css) FILE "$_EXEC/cgilite/common.css";;
+  '') yield_page <<-EOF
+       $(w_month 2019-12 24)
+       $(w_month 2020-01)
+       $(w_month 2020-02)
+       EOF
+    return 0
+    ;;
+esac
+