Add per report OpenGraph images

Includes a bit of refactoring of PhotoSet::get_image_data to make
it easier to call subsequent methods on the photo object. We then
do this to get the width and height.

Also adds width/height attributes to FixMyStreet::ImageMagick
Attributes are updated every time the image is transformed and before
the as_blob data, which also undefs the image, is returned so it always
present for subsequent calls.

Fixes #2394.

1 files changed, 38 insertions, 4 deletions

diff --git a/perllib/FixMyStreet/ImageMagick.pm b/perllib/FixMyStreet/ImageMagick.pm
index af9f56478..d9f643801 100644
--- a/perllib/FixMyStreet/ImageMagick.pm
+++ b/perllib/FixMyStreet/ImageMagick.pm
@@ -23,6 +23,26 @@ has image => (
     },
 );
 
+has width => (
+    is => 'rwp',
+    lazy => 1,
+    default => sub {
+        my $self = shift;
+        return unless $self->image;
+        return $self->image->Get('width');
+    }
+);
+
+has height => (
+    is => 'rwp',
+    lazy => 1,
+    default => sub {
+        my $self = shift;
+        return unless $self->image;
+        return $self->image->Get('height');
+    }
+);
+
 sub strip {
     my $self = shift;
     return $self unless $self->image;
@@ -35,6 +55,7 @@ sub rotate {
     return $self unless $self->image;
     my $err = $self->image->Rotate($direction);
     return 0 if $err;
+    $self->_set_width_and_height();
     return $self;
 }
 
@@ -44,17 +65,21 @@ sub shrink {
     return $self unless $self->image;
     my $err = $self->image->Scale(geometry => "$size>");
     throw Error::Simple("resize failed: $err") if "$err";
+    $self->_set_width_and_height();
     return $self->strip;
 }
 
-# Shrinks a picture to 90x60, cropping so that it is exactly that.
+# Shrinks a picture to a given dimension (defaults to 90x60(, cropping so that
+# it is exactly that.
 sub crop {
-    my $self = shift;
+    my ($self, $size) = @_;
+    $size //= '90x60';
     return $self unless $self->image;
-    my $err = $self->image->Resize( geometry => "90x60^" );
+    my $err = $self->image->Resize( geometry => "$size^" );
     throw Error::Simple("resize failed: $err") if "$err";
-    $err = $self->image->Extent( geometry => '90x60', gravity => 'Center' );
+    $err = $self->image->Extent( geometry => $size, gravity => 'Center' );
     throw Error::Simple("resize failed: $err") if "$err";
+    $self->_set_width_and_height();
     return $self->strip;
 }
 
@@ -62,8 +87,17 @@ sub as_blob {
     my $self = shift;
     return $self->blob unless $self->image;
     my @blobs = $self->image->ImageToBlob();
+    $self->_set_width_and_height();
     $self->_set_image(undef);
     return $blobs[0];
 }
 
+sub _set_width_and_height {
+    my $self = shift;
+    return unless $self->image;
+    my ($width, $height) = $self->image->Get('width', 'height');
+    $self->_set_width($width);
+    $self->_set_height($height);
+}
+
 1;