Merge pull request 'Calculate date till next available episode slot' (#40) from I39_days-till-next-available-episode into main

Reviewed-on: rho_n/hpr_generator#40

templates/content-index.tpl.html

@@ -5,9 +5,30 @@
     <header>
         <h3>Welcome to HPR the Community Podcast</h3>
     </header>
+	<!--% days_till_next_episode = 0 %-->
+	<!--% USE DBI(constants.driver, constants.user, constants.password) %-->
+	<!--% FOREACH next_available_episode_result IN DBI.query('
+		WITH next_id AS (SELECT id, id + 1 AS \'id_next\', date as \'last_date\'
+			FROM eps
+			WHERE eps.date > date(\'now\')
+		)
+		SELECT 
+			MIN (next_id.id_next) AS \'next_id\', 
+			strftime(\'%Y\', MIN (last_date)) AS \'last_year\',
+			strftime(\'%d\', MIN (last_date)) AS \'last_day\',
+			strftime(\'%m\', MIN (last_date)) AS \'last_month\'
+		FROM next_id
+		LEFT JOIN eps ON next_id.id_next = eps.id 
+		WHERE eps.id IS NULL
+	')
+	%-->
+	<!--% USE date %-->
+	<!--% calc = date.calc %-->
+	<!--%  days_till_next_episode = calc.Delta_Days(date.format(date.now, '%Y'),date.format(date.now, '%m'),date.format(date.now, '%d'),next_available_episode_result.last_year,next_available_episode_result.last_month,next_available_episode_result.last_day + 1) %-->
+	<!--% END %-->
 	<!--% USE date %-->  
 	<!--% delta = date.calc.N_Delta_YMD(2005,9,19, date.format(date.now, '%Y'),date.format(date.now, '%m'),date.format(date.now, '%d')) %-->
-	<p>We started producing shows as <a href="https://www.hackerpublicradio.org/twat.php"><em>Today with a Techie</em></a> on 2005-09-19, <!--% delta.0 %--> years, <!--% delta.1 %--> months, <!--% delta.2 %--> days ago. our shows are produced by <a href="<!--% absolute_path(baseurl) %-->correspondents/index.html">listeners</a> like you and can be on any <a href="<!--% absolute_path(baseurl) %-->eps/index.html">topic</a> that <strong>"are of interest to <a href="https://en.wikipedia.org/wiki/hacker_(hobbyist)">hackers</a>"</strong>. if you listen to HPR then please consider contributing one show a year. if you <a href="<!--% absolute_path(baseurl) %-->contribute.html">record</a> your show now it could be <a href="https://www.hackerpublicradio.org/calendar.php">released</a> in <strong>13</strong> days.</p>
+	<p>We started producing shows as <a href="https://www.hackerpublicradio.org/twat.php"><em>Today with a Techie</em></a> on 2005-09-19, <!--% delta.0 %--> years, <!--% delta.1 %--> months, <!--% delta.2 %--> days ago. our shows are produced by <a href="<!--% absolute_path(baseurl) %-->correspondents/index.html">listeners</a> like you and can be on any <a href="<!--% absolute_path(baseurl) %-->eps/index.html">topic</a> that <strong>"are of interest to <a href="https://en.wikipedia.org/wiki/hacker_(hobbyist)">hackers</a>"</strong>. if you listen to HPR then please consider contributing one show a year. if you <a href="<!--% absolute_path(baseurl) %-->contribute.html">record</a> your show now it could be <a href="https://www.hackerpublicradio.org/calendar.php">released</a> in <strong><!--% days_till_next_episode %--></strong> days.</p>
     <h4>Meet the team</h4>
     <p>
     <audio controls preload="none">";
@@ -19,7 +40,6 @@
   <hr>
   <!--% PROCESS 'shared-episode-summary.tpl.html' %-->
 <h1>Latest Shows</h1>
-<!--% USE DBI(constants.driver, constants.user, constants.password) %-->
 <!--% FOREACH latest_episodes IN DBI.query('
 	WITH comment_tallies AS (	
 		SELECT