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# FixMyStreet:Map
# Adding the ability to have different maps on FixMyStreet.
#
# Copyright (c) 2010 UK Citizens Online Democracy. All rights reserved.
# Email: matthew@mysociety.org; WWW: http://www.mysociety.org/
package FixMyStreet::Map;
use strict;
use Module::Pluggable
sub_name => 'maps',
search_path => __PACKAGE__,
require => 1;
# Get the list of maps we want and load map classes at compile time
my @ALL_MAP_CLASSES = allowed_maps();
use FixMyStreet::Gaze;
use mySociety::Locale;
use Utils;
=head2 allowed_maps
Returns an array of all the map classes that were found and that
are permitted by the config.
=cut
sub allowed_maps {
my @allowed = split /,/, ( FixMyStreet->config('MAP_TYPE') or "");
push @allowed, 'OSM'; # OSM is always allowed
@allowed = map { __PACKAGE__.'::'.$_ } @allowed;
my %avail = map { $_ => 1 } __PACKAGE__->maps;
return grep { $avail{$_} } @allowed;
}
=head2 reload_allowed_maps
Allows tests to override MAP_TYPE at run time.
=cut
sub reload_allowed_maps {
@ALL_MAP_CLASSES = allowed_maps();
}
=head2 map_class
Sets the appropriate class given a query parameter string.
Returns the old map class, if any.
=cut
our $map_class;
sub set_map_class {
my $str = shift;
$str = __PACKAGE__.'::'.$str if $str;
my %avail = map { $_ => 1 } @ALL_MAP_CLASSES;
$str = $ALL_MAP_CLASSES[0] unless $str && $avail{$str};
my $old_map_class = $map_class;
$map_class = $str;
return $old_map_class;
}
sub display_map {
return $map_class->display_map(@_);
}
sub map_features {
my ( $c, %p ) = @_;
if ($p{bbox}) {
@p{"min_lon", "min_lat", "max_lon", "max_lat"} = split /,/, $p{bbox};
}
if (defined $p{latitude} && defined $p{longitude}) {
# TODO - be smarter about calculating the surrounding square
# use deltas that are roughly 500m in the UK - so we get a 1 sq km search box
my $lat_delta = 0.00438;
my $lon_delta = 0.00736;
$p{min_lon} = $p{longitude} - $lon_delta;
$p{min_lat} = $p{latitude} - $lat_delta;
$p{max_lon} = $p{longitude} + $lon_delta;
$p{max_lat} = $p{latitude} + $lat_delta;
} else {
$p{longitude} = ($p{max_lon} + $p{min_lon} ) / 2;
$p{latitude} = ($p{max_lat} + $p{min_lat} ) / 2;
}
# list of problems around map can be limited, but should show all pins
my $around_limit = $c->cobrand->on_map_list_limit || undef;
my @around_args = @p{"min_lat", "max_lat", "min_lon", "max_lon", "interval"};
my $on_map_all = $c->cobrand->problems_on_map->around_map( @around_args, undef, $p{categories}, $p{states} );
my $on_map_list = $around_limit
? $c->cobrand->problems_on_map->around_map( @around_args, $around_limit, $p{categories}, $p{states} )
: $on_map_all;
my $dist = FixMyStreet::Gaze::get_radius_containing_population( $p{latitude}, $p{longitude} );
my $limit = 20;
my @ids = map { $_->id } @$on_map_list;
my $nearby = $c->model('DB::Nearby')->nearby(
$c, $dist, \@ids, $limit, @p{"latitude", "longitude", "interval", "categories", "states"}
);
return ( $on_map_all, $on_map_list, $nearby, $dist );
}
sub click_to_wgs84 {
return $map_class->click_to_wgs84(@_);
}
=head2 tile_xy_to_wgs84
Takes the tile x,y and converts to lat, lon. Legacy to deal with old URLs,
hence hard-coded things.
=cut
sub tile_xy_to_wgs84 {
my ( $x, $y ) = @_;
my $easting = int( $x * (5000/31) + 0.5 );
my $northing = int( $y * (5000/31) + 0.5 );
my ( $lat, $lon ) = Utils::convert_en_to_latlon( $easting, $northing );
return ( $lat, $lon );
}
1;
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