164 lines
5.2 KiB
Perl
Executable File
164 lines
5.2 KiB
Perl
Executable File
#!/usr/local/bin/perl
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#
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# The ticker (client & admin) loosely follows an MVC architecture. The model
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# is over in Ticker.pm (it does all the DB work). ticker.cgi is the view for
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# the client, while this is the view+controller for the admin.
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#
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use strict;
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use warnings;
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use lib '/home/slowtwitch/site/slowtwitch.com/cgi-bin/articles/admin';
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use Links qw(:objects);
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use Ticker;
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use Error qw(:try);
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Links::init('/var/home/slowtwitch/site/slowtwitch.com/cgi-bin/articles/admin');
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Links::init_admin();
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use constant {
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STATE_NORMAL => 0,
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STATE_UPDATE => 1,
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STATE_REDIRECT => 2,
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ADMIN_URL => "https://www.slowtwitch.com/cgi-bin/articles/ticker/admin/admin.cgi"
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};
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# prototypes.
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sub controller();
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sub view($);
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# And call the controller.
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controller();
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#
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# This is the controller. This is where work gets done.
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#
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sub controller() {
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my %viewstate = (state => STATE_NORMAL);
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# if we have an action parameter (that's non-empty), then do work:
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if(defined $IN->param('action') && length($IN->param('action')) > 0) {
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$viewstate{state} = STATE_REDIRECT;
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try {
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my $p = $IN->get_hash();
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if($p->{action} =~ /create/) {
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Ticker::create_ticker($p->{msg}, $p->{link});
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} elsif($p->{action} =~ /show_update/) {
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$viewstate{state} = STATE_UPDATE;
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$viewstate{id} = $p->{'id'};
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} elsif($p->{action} =~ /do_update/) {
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Ticker::update_ticker($p->{'id'}, $p->{'msg'}, $p->{'link'});
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} elsif($p->{action} =~ /delete/) {
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Ticker::delete_ticker($p->{'id'});
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}
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} catch Ticker::TickerException with {
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# oops. something bad happened.
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$viewstate{error} = "Error: " . shift;
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# reset the viewstate so that we display the error message.
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$viewstate{state} = STATE_NORMAL;
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};
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}
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return view(\%viewstate);
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}
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#
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# Build the view, which takes a single hashref describing how the view should
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# behave.
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#
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sub view($) {
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my ($state) = @_;
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my %s = %$state;
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# If the state is redirect, we're done.
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if($s{state} == STATE_REDIRECT) {
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print $IN->redirect(ADMIN_URL);
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return;
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}
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# Now let's actually build the view, depending on our current state:
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print $IN->header();
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print qq{<html><head><title>Ticker Admin</title></head><body>};
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# Try to load all the tickers:
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try {
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$s{data} = Ticker::read_tickers();
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# Are we also trying to update a record? Yeah, I know - we're
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# hitting the db again. I wish that fetchall_hashref actually worked...
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if(defined $s{id}) {
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my $result = Ticker::read_ticker($s{id});
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$s{msg} = $result->{ticker_text};
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$s{link} = $result->{ticker_link};
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}
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} catch Ticker::TickerException with {
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$s{error} .= " Could not read tickers from database!";
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};
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# Print an error message if we have one:
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if(defined $s{error}) {
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print "<p>" . $s{error} . "</p>";
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}
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# What should the top form look like?
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if($s{state} == STATE_NORMAL) {
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$s{title} = 'Create a ticker:';
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$s{submit} = 'Create ticker';
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$s{action} = 'create';
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$s{id} = "";
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$s{msg} = "";
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$s{link} = "";
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} elsif($s{state} == STATE_UPDATE) {
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$s{title} = 'Update a ticker:';
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$s{submit} = 'Update ticker';
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$s{action} = 'do_update';
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}
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# print the form, which is configured for the type of action we're
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# performing:
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print qq{<h3>} . $s{title} . qq{</h3>
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<form method="post" action="} . ADMIN_URL . qq{">
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<input type="hidden" name="action" value="} .
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$s{action} . qq{"/>
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<input type="hidden" name="id" value="} . $s{id} . qq{"/>
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<div><label for="message">Message:</label>
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<input type="text" name="msg" value="} . $s{msg} . qq{"/>
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</div><div><label for="link">Link:</label>
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<input type="text" name="link" value="} . $s{link} . qq{"/>
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</div><div><input type="submit" value="} . $s{submit} . qq{"/>
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</div></form>
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};
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# provide a way to get back to the create interface:
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if($s{action} =~ /update/) {
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print qq{<a href="} . ADMIN_URL . qq{">Create a ticker instead.</a>};
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}
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# Now print the entire list of all tickers.
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print qq{<h3>Current tickers:</h3>};
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# If there are no tickers, say so:
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if(@{$s{data}} == 0) {
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print "There are no tickers.";
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} else {
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# Print a table showing the ID, delete/edit links, messages, and links:
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print "<table>";
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print "<tr><td>ID</td><td/><td/><td>Message</td><td>Link</td></tr>";
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foreach my $k (@{$s{data}}) {
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my $id = $k->{ticker_id};
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my $msg = $k->{ticker_text};
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my $link = $k->{ticker_link};
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print qq{<tr><td>$id</td><td>
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<a href="} . ADMIN_URL . qq{?action=delete&id=$id">Delete</a></td><td>
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<a href="} . ADMIN_URL . qq{?action=show_update&id=$id">Update</a></td><td>} .
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$msg . "</td><td>" .
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qq{<a href="} . $link . qq{">} .
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$link . "</a></td></tr>";
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}
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print "</table>";
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}
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print qq{</body></html>};
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}
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