From 99ffd6f0cf39fb895c01f8e7488b8911f57a052b Mon Sep 17 00:00:00 2001
From: Jonas Smedegaard <dr@jones.dk>
Date: Sat, 4 Aug 2012 22:18:05 +0200
Subject: Add plugin osm.

---
 IkiWiki/Plugin/osm.pm | 541 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 541 insertions(+)
 create mode 100644 IkiWiki/Plugin/osm.pm

diff --git a/IkiWiki/Plugin/osm.pm b/IkiWiki/Plugin/osm.pm
new file mode 100644
index 0000000..c9c5646
--- /dev/null
+++ b/IkiWiki/Plugin/osm.pm
@@ -0,0 +1,541 @@
+#!/usr/bin/perl
+# Copyright 2011 Blars Blarson
+# Released under GPL version 2
+
+package IkiWiki::Plugin::osm;
+use utf8;
+use strict;
+use warnings;
+use IkiWiki 3.0;
+
+sub import {
+	add_underlay("osm");
+	hook(type => "getsetup", id => "osm", call => \&getsetup);
+	hook(type => "format", id => "osm", call => \&format);
+	hook(type => "preprocess", id => "osm", call => \&preprocess);
+	hook(type => "preprocess", id => "waypoint", call => \&process_waypoint);
+	hook(type => "savestate", id => "waypoint", call => \&savestate);
+	hook(type => "cgi", id => "osm", call => \&cgi);
+}
+
+sub getsetup () {
+	return
+		plugin => {
+			safe => 1,
+			rebuild => 1,
+			section => "special-purpose",
+		},
+		osm_default_zoom => {
+			type => "integer",
+			example => "15",
+			description => "the default zoom when you click on the map link",
+			safe => 1,
+			rebuild => 1,
+		},
+		osm_default_icon => {
+			type => "string",
+			example => "ikiwiki/images/osm.png",
+			description => "the icon shown on links and on the main map",
+			safe => 0,
+			rebuild => 1,
+		},
+		osm_alt => {
+			type => "string",
+			example => "",
+			description => "the alt tag of links, defaults to empty",
+			safe => 0,
+			rebuild => 1,
+		},
+		osm_format => {
+			type => "string",
+			example => "KML",
+			description => "the output format for waypoints, can be KML, GeoJSON or CSV (one or many, comma-separated)",
+			safe => 1,
+			rebuild => 1,
+		},
+		osm_tag_default_icon => {
+			type => "string",
+			example => "icon.png",
+			description => "the icon attached to a tag, displayed on the map for tagged pages",
+			safe => 0,
+			rebuild => 1,
+		},
+}
+
+sub preprocess {
+	my %params=@_;
+	my $page = $params{page};
+	my $dest = $params{destpage};
+	my $loc = $params{loc}; # sanitized below
+	my $lat = $params{lat}; # sanitized below
+	my $lon = $params{lon}; # sanitized below
+	my $href = $params{href};
+
+	my ($width, $height, $float);
+	$height = scrub($params{'height'} || "300px", $page, $dest); # sanitized here
+	$width = scrub($params{'width'} || "500px", $page, $dest); # sanitized here
+	$float = (defined($params{'right'}) && 'right') || (defined($params{'left'}) && 'left'); # sanitized here
+	
+	my $zoom = scrub($params{'zoom'} // $config{'osm_default_zoom'} // 15, $page, $dest); # sanitized below
+	my $map;
+	$map = $params{'map'} || 'map';
+	
+	$map = scrub($map, $page, $dest); # sanitized here
+	my $name = scrub($params{'name'} || $map, $page, $dest);
+
+	if (defined($lon) || defined($lat) || defined($loc)) {
+		($lon, $lat) = scrub_lonlat($loc, $lon, $lat);
+	}
+
+	if ($zoom !~ /^\d\d?$/ || $zoom < 2 || $zoom > 18) {
+		error("Bad zoom");
+	}
+
+	if (! defined $href || ! length $href) {
+		$href=IkiWiki::cgiurl(
+			do => "osm",
+			map => $map,
+		);
+	}
+
+	$pagestate{$page}{'osm'}{$map}{'displays'}{$name} = {
+		height => $height,
+		width => $width,
+		float => $float,
+		zoom => $zoom,
+		fullscreen => 0,
+		editable => defined($params{'editable'}),
+		lat => $lat,
+		lon => $lon,
+		href => $href,
+	};
+	return "<div id=\"mapdiv-$name\"></div>";
+}
+
+sub process_waypoint {
+	my %params=@_;
+	my $loc = $params{'loc'}; # sanitized below
+	my $lat = $params{'lat'}; # sanitized below
+	my $lon = $params{'lon'}; # sanitized below
+	my $page = $params{'page'}; # not sanitized?
+	my $dest = $params{'destpage'}; # not sanitized?
+	my $hidden = defined($params{'hidden'}); # sanitized here
+	my ($p) = $page =~ /(?:^|\/)([^\/]+)\/?$/; # shorter page name
+	my $name = scrub($params{'name'} || $p, $page, $dest); # sanitized here
+	my $desc = scrub($params{'desc'} || '', $page, $dest); # sanitized here
+	my $zoom = scrub($params{'zoom'} // $config{'osm_default_zoom'} // 15, $page, $dest); # sanitized below
+	my $icon = $config{'osm_default_icon'} || "ikiwiki/images/osm.png"; # sanitized: we trust $config
+	my $map = scrub($params{'map'} || 'map', $page, $dest); # sanitized here
+	my $alt = $config{'osm_alt'} ? "alt=\"$config{'osm_alt'}\"" : ''; # sanitized: we trust $config
+	if ($zoom !~ /^\d\d?$/ || $zoom < 2 || $zoom > 18) {
+		error("Bad zoom");
+	}
+
+	($lon, $lat) = scrub_lonlat($loc, $lon, $lat);
+	if (!defined($lat) || !defined($lon)) {
+		error("Must specify lat and lon");
+	}
+
+	my $tag = $params{'tag'};
+	foreach my $t (keys %{$typedlinks{$page}{'tag'}}) {
+		if ($icon = get_tag_icon($t)) {
+			$tag = $t;
+			last;
+		}
+		$t =~ s!/$config{'tagbase'}/!!;
+		if ($icon = get_tag_icon($t)) {
+			$tag = $t;
+			last;
+		}
+	}
+	$icon = urlto($icon, $dest, 1);
+	$tag = '' unless $tag;
+	if ($page eq $dest) {
+		my %formats = get_formats();
+		if ($formats{'GeoJSON'}) {
+			will_render($page, "$map/pois.json");
+		}
+		if ($formats{'CSV'}) {
+			will_render($page, "$map/pois.txt");
+		}
+		if ($formats{'KML'}) {
+			will_render($page, "$map/pois.kml");
+		}
+	}
+	$pagestate{$page}{'osm'}{$map}{'waypoints'}{$name} = {
+		page => $page,
+		desc => $desc,
+		icon => $icon,
+		tag => $tag,
+		lat => $lat,
+		lon => $lon,
+		# How to link back to the page from the map, not to be
+		# confused with the URL of the map itself sent to the
+		# embeded map below. Note: used in generated KML etc file,
+		# so must be absolute.
+		href => urlto($page),
+	};
+
+	my $mapurl = IkiWiki::cgiurl(
+		do => "osm",
+		map => $map,
+		lat => $lat,
+		lon => $lon,
+		zoom => $zoom,
+	);
+	my $output = '';
+	if (defined($params{'embed'})) {
+		$output .= preprocess(%params,
+			href => $mapurl,
+		);
+	}
+	if (!$hidden) {
+		$output .= "<a href=\"$mapurl\"><img class=\"img\" src=\"$icon\" $alt /></a>";
+	}
+	return $output;
+}
+
+# get the icon from the given tag
+sub get_tag_icon($) {
+	my $tag = shift;
+	# look for an icon attached to the tag
+	my $attached = $tag . '/' . $config{'osm_tag_default_icon'};
+	if (srcfile($attached)) {
+		return $attached;
+	}
+	else {
+		return undef;
+	}
+}
+
+sub scrub_lonlat($$$) {
+	my ($loc, $lon, $lat) = @_;
+	if ($loc) {
+		if ($loc =~ /^\s*(\-?\d+(?:\.\d*°?|(?:°?|\s)\s*\d+(?:\.\d*\'?|(?:\'|\s)\s*\d+(?:\.\d*)?\"?|\'?)°?)[NS]?)\s*\,?\;?\s*(\-?\d+(?:\.\d*°?|(?:°?|\s)\s*\d+(?:\.\d*\'?|(?:\'|\s)\s*\d+(?:\.\d*)?\"?|\'?)°?)[EW]?)\s*$/) {
+			$lat = $1;
+			$lon = $2;
+		}
+		else {
+			error("Bad loc");
+		}
+	}
+	if (defined($lat)) {
+		if ($lat =~ /^(\-?)(\d+)(?:(\.\d*)°?|(?:°|\s)\s*(\d+)(?:(\.\d*)\'?|(?:\'|\s)\s*(\d+(?:\.\d*)?\"?)|\'?)|°?)\s*([NS])?\s*$/) {
+			$lat = $2 + ($3//0) + ((($4//0) + (($5//0) + (($6//0)/60.)))/60.);
+			if (($1 eq '-') || (($7//'') eq 'S')) {
+				$lat = - $lat;
+			}
+		}
+		else {
+			error("Bad lat");
+		}
+	}
+	if (defined($lon)) {
+		if ($lon =~ /^(\-?)(\d+)(?:(\.\d*)°?|(?:°|\s)\s*(\d+)(?:(\.\d*)\'?|(?:\'|\s)\s*(\d+(?:\.\d*)?\"?)|\'?)|°?)\s*([EW])?$/) {
+			$lon = $2 + ($3//0) + ((($4//0) + (($5//0) + (($6//0)/60.)))/60.);
+			if (($1 eq '-') || (($7//'') eq 'W')) {
+				$lon = - $lon;
+			}
+		}
+		else {
+			error("Bad lon");
+		}
+	}
+	if ($lat < -90 || $lat > 90 || $lon < -180 || $lon > 180) {
+		error("Location out of range");
+	}
+	return ($lon, $lat);
+}
+
+sub savestate {
+	my %waypoints = ();
+	my %linestrings = ();
+
+	foreach my $page (keys %pagestate) {
+		if (exists $pagestate{$page}{'osm'}) {
+			foreach my $map (keys %{$pagestate{$page}{'osm'}}) {
+				foreach my $name (keys %{$pagestate{$page}{'osm'}{$map}{'waypoints'}}) {
+					debug("found waypoint $name");
+					$waypoints{$map}{$name} = $pagestate{$page}{'osm'}{$map}{'waypoints'}{$name};
+				}
+			}
+		}
+	}
+
+	foreach my $page (keys %pagestate) {
+		if (exists $pagestate{$page}{'osm'}) {
+			foreach my $map (keys %{$pagestate{$page}{'osm'}}) {
+				# examine the links on this page
+				foreach my $name (keys %{$pagestate{$page}{'osm'}{$map}{'waypoints'}}) {
+					if (exists $links{$page}) {
+						foreach my $otherpage (@{$links{$page}}) {
+							if (exists $waypoints{$map}{$otherpage}) {
+								push(@{$linestrings{$map}}, [
+									[ $waypoints{$map}{$name}{'lon'}, $waypoints{$map}{$name}{'lat'} ],
+									[ $waypoints{$map}{$otherpage}{'lon'}, $waypoints{$map}{$otherpage}{'lat'} ]
+								]);
+							}
+						}
+					}
+				}
+			}
+			# clear the state, it will be regenerated on the next parse
+			# the idea here is to clear up removed waypoints...
+			$pagestate{$page}{'osm'} = ();
+		}
+	}
+
+	my %formats = get_formats();
+	if ($formats{'GeoJSON'}) {
+		writejson(\%waypoints, \%linestrings);
+	}
+	if ($formats{'CSV'}) {
+		writecsvs(\%waypoints, \%linestrings);
+	}
+	if ($formats{'KML'}) {
+		writekml(\%waypoints, \%linestrings);
+	}
+}
+
+sub writejson($;$) {
+	my %waypoints = %{$_[0]};
+	my %linestrings = %{$_[1]};
+	eval q{use JSON};
+	error $@ if $@;
+	foreach my $map (keys %waypoints) {
+		my %geojson = ( "type" => "FeatureCollection", "features" => []);
+		foreach my $name (keys %{$waypoints{$map}}) {
+			my %marker = ( "type" => "Feature",
+				"geometry" => { "type" => "Point", "coordinates" => [ $waypoints{$map}{$name}{'lon'}, $waypoints{$map}{$name}{'lat'} ] },
+				"properties" => $waypoints{$map}{$name} );
+			push @{$geojson{'features'}}, \%marker;
+		}
+		foreach my $linestring (@{$linestrings{$map}}) {
+			my %json  = ( "type" => "Feature",
+				"geometry" => { "type" => "LineString", "coordinates" => $linestring });
+			push @{$geojson{'features'}}, \%json;
+		}
+		writefile("pois.json", $config{destdir} . "/$map", to_json(\%geojson));
+	}
+}
+
+sub writekml($;$) {
+	my %waypoints = %{$_[0]};
+	my %linestrings = %{$_[1]};
+	eval q{use XML::Writer};
+	error $@ if $@;
+	foreach my $map (keys %waypoints) {
+		my $output;
+		my $writer = XML::Writer->new( OUTPUT => \$output,
+			DATA_MODE => 1, ENCODING => 'UTF-8');
+		$writer->xmlDecl();
+		$writer->startTag("kml", "xmlns" => "http://www.opengis.net/kml/2.2");
+
+		# first pass: get the icons
+		foreach my $name (keys %{$waypoints{$map}}) {
+			my %options = %{$waypoints{$map}{$name}};
+			$writer->startTag("Style", id => $options{tag});
+			$writer->startTag("IconStyle");
+			$writer->startTag("Icon");
+			$writer->startTag("href");
+			$writer->characters($options{icon});
+			$writer->endTag();
+			$writer->endTag();
+			$writer->endTag();
+			$writer->endTag();
+		}
+	
+		foreach my $name (keys %{$waypoints{$map}}) {
+			my %options = %{$waypoints{$map}{$name}};
+			$writer->startTag("Placemark");
+			$writer->startTag("name");
+			$writer->characters($name);
+			$writer->endTag();
+			$writer->startTag("styleUrl");
+			$writer->characters('#' . $options{tag});
+			$writer->endTag();
+			#$writer->emptyTag('atom:link', href => $options{href});
+			# to make it easier for us as the atom:link parameter is
+			# hard to access from javascript
+			$writer->startTag('href');
+			$writer->characters($options{href});
+			$writer->endTag();
+			$writer->startTag("description");
+			$writer->characters($options{desc});
+			$writer->endTag();
+			$writer->startTag("Point");
+			$writer->startTag("coordinates");
+			$writer->characters($options{lon} . "," . $options{lat});
+			$writer->endTag();
+			$writer->endTag();
+			$writer->endTag();
+		}
+		
+		my $i = 0;
+		foreach my $linestring (@{$linestrings{$map}}) {
+			$writer->startTag("Placemark");
+			$writer->startTag("name");
+			$writer->characters("linestring " . $i++);
+			$writer->endTag();
+			$writer->startTag("LineString");
+			$writer->startTag("coordinates");
+			my $str = '';
+			foreach my $coord (@{$linestring}) {
+				$str .= join(',', @{$coord}) . " \n";
+			}
+			$writer->characters($str);
+			$writer->endTag();
+			$writer->endTag();
+			$writer->endTag();
+		}
+		$writer->endTag();
+		$writer->end();
+
+		writefile("pois.kml", $config{destdir} . "/$map", $output);
+	}
+}
+
+sub writecsvs($;$) {
+	my %waypoints = %{$_[0]};
+	foreach my $map (keys %waypoints) {
+		my $poisf = "lat\tlon\ttitle\tdescription\ticon\ticonSize\ticonOffset\n";
+		foreach my $name (keys %{$waypoints{$map}}) {
+			my %options = %{$waypoints{$map}{$name}};
+			my $line = 
+				$options{'lat'} . "\t" .
+				$options{'lon'} . "\t" .
+				$name . "\t" .
+				$options{'desc'} . '<br /><a href="' . $options{'page'} . '">' . $name . "</a>\t" .
+				$options{'icon'} . "\n";
+			$poisf .= $line;
+		}
+		writefile("pois.txt", $config{destdir} . "/$map", $poisf);
+	}
+}
+
+# pipe some data through the HTML scrubber
+#
+# code taken from the meta.pm plugin
+sub scrub($$$) {
+	if (IkiWiki::Plugin::htmlscrubber->can("sanitize")) {
+		return IkiWiki::Plugin::htmlscrubber::sanitize(
+			content => shift, page => shift, destpage => shift);
+	}
+	else {
+		return shift;
+	}
+}
+
+# taken from toggle.pm
+sub format (@) {
+	my %params=@_;
+
+	if ($params{content}=~m!<div[^>]*id="mapdiv-[^"]*"[^>]*>!g) {
+		if (! ($params{content}=~s!</body>!include_javascript($params{page})."</body>"!em)) {
+			# no <body> tag, probably in preview mode
+			$params{content}=$params{content} . include_javascript($params{page});
+		}
+	}
+	return $params{content};
+}
+
+sub preferred_format() {
+	if (!defined($config{'osm_format'}) || !$config{'osm_format'}) {
+		$config{'osm_format'} = 'KML';
+	}
+	my @spl = split(/, */, $config{'osm_format'});
+	return shift @spl;
+}
+
+sub get_formats() {
+	if (!defined($config{'osm_format'}) || !$config{'osm_format'}) {
+		$config{'osm_format'} = 'KML';
+	}
+	map { $_ => 1 } split(/, */, $config{'osm_format'});
+}
+
+sub include_javascript ($) {
+	my $page=shift;
+	my $loader;
+
+	if (exists $pagestate{$page}{'osm'}) {
+		foreach my $map (keys %{$pagestate{$page}{'osm'}}) {
+			foreach my $name (keys %{$pagestate{$page}{'osm'}{$map}{'displays'}}) {
+				$loader .= map_setup_code($map, $name, %{$pagestate{$page}{'osm'}{$map}{'displays'}{$name}});
+			}
+		}
+	}
+	if ($loader) {
+		return embed_map_code($page) . "<script type=\"text/javascript\" charset=\"utf-8\">$loader</script>";
+	}
+	else {
+        	return '';
+	}
+}
+
+sub cgi($) {
+	my $cgi=shift;
+
+	return unless defined $cgi->param('do') &&
+		$cgi->param("do") eq "osm";
+	
+	IkiWiki::loadindex();
+
+	IkiWiki::decode_cgi_utf8($cgi);
+
+	my $map = $cgi->param('map');
+	if (!defined $map || $map !~ /^[a-z]*$/) {
+		error("invalid map parameter");
+	}
+
+	print "Content-Type: text/html\r\n";
+	print ("\r\n");
+	print "<html><body>";
+	print "<div id=\"mapdiv-$map\"></div>";
+	print embed_map_code();
+	print "<script type=\"text/javascript\" charset=\"utf-8\">";
+	print map_setup_code($map, $map,
+		lat => "urlParams['lat']",
+		lon => "urlParams['lon']",
+		zoom => "urlParams['zoom']",
+		fullscreen => 1,
+		editable => 1,
+	);
+	print "</script>";
+	print "</body></html>";
+
+	exit 0;
+}
+
+sub embed_map_code(;$) {
+	my $page=shift;
+	return '<script src="http://www.openlayers.org/api/OpenLayers.js" type="text/javascript" charset="utf-8"></script>'.
+		'<script src="'.urlto("ikiwiki/osm.js", $page).
+		'" type="text/javascript" charset="utf-8"></script>'."\n";
+}
+
+sub map_setup_code($;@) {
+	my $map=shift;
+	my $name=shift;
+	my %options=@_;
+
+	eval q{use JSON};
+	error $@ if $@;
+				
+	$options{'format'} = preferred_format();
+
+	my %formats = get_formats();
+	if ($formats{'GeoJSON'}) {
+		$options{'jsonurl'} = urlto($map."/pois.json");
+	}
+	if ($formats{'CSV'}) {
+		$options{'csvurl'} = urlto($map."/pois.txt");
+	}
+	if ($formats{'KML'}) {
+		$options{'kmlurl'} = urlto($map."/pois.kml");
+	}
+
+	return "mapsetup('mapdiv-$name', " . to_json(\%options) . ");";
+}
+
+1;
-- 
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