From f617949281e42ff3371e62226d10cb48a0ec8d22 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Uro=C5=A1=20Golja?= <uros.golja@guru.si>
Date: Tue, 25 Oct 2016 16:01:24 +0200
Subject: [PATCH] Initial import

---
 .gitignore                        |   2 +
 symlink-images-by-aspect-ratio.pl | 105 ++++++++++++++++++++++++++++++
 2 files changed, 107 insertions(+)
 create mode 100644 .gitignore
 create mode 100755 symlink-images-by-aspect-ratio.pl

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..2d8be33
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+links/*
+pics/*
diff --git a/symlink-images-by-aspect-ratio.pl b/symlink-images-by-aspect-ratio.pl
new file mode 100755
index 0000000..982f2f6
--- /dev/null
+++ b/symlink-images-by-aspect-ratio.pl
@@ -0,0 +1,105 @@
+#!/usr/bin/perl
+
+use warnings;
+use strict;
+
+use File::Find::Wanted;
+use File::Basename;
+use Image::EXIF;
+use Data::Dumper::Simple;
+use Math::Round;
+
+$Data::Dumper::Indent = 3;
+
+my $conf = {
+    src_dir => "./pics",
+    dst_dir => "./links", 
+};
+
+# gather the list of files
+my @list = find_wanted(
+    sub { -f && ( /\.jpg$/i || /\.jpeg$/i ) }, 
+    $conf->{"src_dir"} 
+);
+
+# get their information
+my (%files, %ars, $i, $errors);
+foreach my $f (@list) {
+    $i++;
+    print "Gathering info for image in file: $f\n";
+    my $e = Image::EXIF->new($f);
+    my $exif = $e->get_image_info();
+
+    my ($x, $y, $error_flag);
+    # Check for the existence of x
+    if (!defined $exif->{"Image Width"}) {
+        print "WARNING: Could not find attribute 'Image Width'.";
+        $error_flag = 1;
+    }
+    else {
+        $x = $exif->{"Image Width"};
+    }
+
+    # Check for the existence of y
+    if (!defined $exif->{"Image Height"}) {
+        print "WARNING: Could not find attribute 'Image Height'.";
+        $error_flag = 1;
+    }
+    else {
+        $y = $exif->{"Image Height"};
+    }
+
+    # Calculate aspect ratio and append it into the hash
+    if ($error_flag) {
+        print "Unable to calculate aspect ratio for this image. Skipping."
+    }
+    else {
+        my $ar;
+        $ar = nearest(0.01, ($x > $y) ? $x / $y : $y / $x) unless $error_flag;
+        $ars{$ar}++;
+        $files{$f}->{"ar"} = $ar;
+    }
+
+    # Append the exif data into hash
+    $files{$f}->{"exif"} = $exif;
+
+    # bump the number of errors
+    $errors++ if $error_flag;
+}
+
+print "All images and their EXIF data:";
+print Dumper %files;
+print "\n";
+
+print "Total images found: $i\n";
+print "Images with invalid EXIF data: $errors\n";
+
+print "Aspect ratio information for all images (aspect ratio => number of occurences):\n";
+print Dumper %ars;
+print "\n";
+
+# Create destination directories
+print "Creating destination directories.\n";
+foreach my $d (keys %ars) {
+    my $dirname = $conf->{"dst_dir"} . "/" . $d;
+    print "Creating directory: $dirname\n";
+    mkdir $dirname;
+}
+print "\n";
+
+# Symlink
+print "Symlinking source files into destination directories.";
+foreach my $f (keys %files) {
+    next unless exists $files{$f}->{"ar"};
+
+    # construct the symlink name
+    my $name = basename($f);
+    my $ar = $files{$f}->{"ar"};
+    my $dest = $conf->{"dst_dir"} . "/" . $ar . "/" . $name;
+
+    # symlink
+    print "$f -> $dest\n";
+    symlink($f, $dest);
+}
+
+# vim: set ts=4 sw=4 et cc=80: