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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 mySociety::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 map_class
Set and return the appropriate class given a query parameter string.
=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};
$map_class = $str;
}
sub display_map {
return $map_class->display_map(@_);
}
sub map_features {
my ( $c, $lat, $lon, $interval ) = @_;
# 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;
return _map_features(
$c, $lat, $lon,
$lon - $lon_delta, $lat - $lat_delta,
$lon + $lon_delta, $lat + $lat_delta,
$interval
);
}
sub map_features_bounds {
my ( $c, $min_lon, $min_lat, $max_lon, $max_lat, $interval ) = @_;
my $lat = ( $max_lat + $min_lat ) / 2;
my $lon = ( $max_lon + $min_lon ) / 2;
return _map_features(
$c, $lat, $lon,
$min_lon, $min_lat,
$max_lon, $max_lat,
$interval
);
}
sub _map_features {
my ( $c, $lat, $lon, $min_lon, $min_lat, $max_lon, $max_lat, $interval ) = @_;
# 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 = ( $min_lat, $max_lat, $min_lon, $max_lon, $interval );
my $around_map = $c->cobrand->problems->around_map( @around_args, undef );
my $around_map_list = $around_limit
? $c->cobrand->problems->around_map( @around_args, $around_limit )
: $around_map;
my $dist;
mySociety::Locale::in_gb_locale {
$dist =
mySociety::Gaze::get_radius_containing_population( $lat, $lon,
200000 );
};
$dist = int( $dist * 10 + 0.5 ) / 10;
my $limit = 20;
my @ids = map { $_->id } @$around_map_list;
my $nearby = $c->model('DB::Nearby')->nearby(
$c, $dist, \@ids, $limit, $lat, $lon, $interval
);
return ( $around_map, $around_map_list, $nearby, $dist );
}
sub map_pins {
my ($c, $interval) = @_;
my $bbox = $c->req->param('bbox');
my ( $min_lon, $min_lat, $max_lon, $max_lat ) = split /,/, $bbox;
my ( $around_map, $around_map_list, $nearby, $dist ) =
FixMyStreet::Map::map_features_bounds( $c, $min_lon, $min_lat, $max_lon, $max_lat, $interval );
# create a list of all the pins
my @pins = map {
# Here we might have a DB::Problem or a DB::Nearby, we always want the problem.
my $p = (ref $_ eq 'FixMyStreet::App::Model::DB::Nearby') ? $_->problem : $_;
my $colour = $c->cobrand->pin_colour( $p, 'around' );
[ $p->latitude, $p->longitude,
$colour,
$p->id, $p->title_safe
]
} @$around_map, @$nearby;
return (\@pins, $around_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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