From 53c16708fe8e814eef5b8672085e257a253f994c Mon Sep 17 00:00:00 2001
From: Thomas von Dein <tom@vondein.org>
Date: Fri, 11 Aug 2023 20:15:36 +0200
Subject: [PATCH] Added script to recombine 2 dumps into a new one."

---
 bin/sync-combine-two-yaml-exports-into-one.pl | 113 ++++++++++++++++++
 1 file changed, 113 insertions(+)
 create mode 100755 bin/sync-combine-two-yaml-exports-into-one.pl

diff --git a/bin/sync-combine-two-yaml-exports-into-one.pl b/bin/sync-combine-two-yaml-exports-into-one.pl
new file mode 100755
index 0000000..6f4051a
--- /dev/null
+++ b/bin/sync-combine-two-yaml-exports-into-one.pl
@@ -0,0 +1,113 @@
+#!/usr/bin/perl
+use warnings;
+use strict;
+no strict "refs";
+
+use IO::All;
+use Encode;
+use YAML::XS qw(Load Dump);
+use Data::Dumper;
+
+my ($yf1, $yf2) = @ARGV;
+
+# read  both input  files  and  parse yaml  into  data structure,  fix
+# non-printables
+my $badutf81 < io $yf1;
+my $yaml1 = decode( 'UTF-8', $badutf81 =~ s/[^\x00-\x7F]+//gr );
+my $y1 = Load $yaml1 or die "Could not load $yf1: $!";
+
+my $badutf82 < io $yf2;
+my $yaml2 = decode( 'UTF-8', $badutf82 =~ s/[^\x00-\x7F]+//gr );
+my $y2 = Load $yaml2 or die "Could not load $yf2: $!";
+
+# convert to comparable hashes with unique keys
+my $hash1 = &hashify($y1);
+my $hash2 = &hashify($y2);
+
+# diff and recombine the two into a new one
+my $combinedhash = &hash2note(&diff($hash1, $hash2));
+
+# turn into yaml
+my $combindedyaml = Dump($combinedhash);
+
+# perl uses scalars as hash keys (read: strings) so we need to unquote
+# them here to make note happy
+$combindedyaml =~ s/^'(\d+)':/$1:/gm;
+
+
+print $combindedyaml;
+
+
+sub hash2note {
+    # convert given hash into note format with number as key
+    my $hash = shift;
+    my $new;
+    my $i = 0;
+    
+    foreach my $path (sort keys %{$hash}) {
+        $new->{++$i} = $hash->{$path};
+    }
+
+    return $new;
+}
+
+sub diff {
+    # diff the two hashes, create a new combined one
+    my($hash1, $hash2) = @_;
+    my $new;
+
+    # iterate over hash1, store duplicates and remove them in hash2,
+    # store different entries and remove in both,
+    # store those missing in hash2 and delete them in hash1
+    foreach my $path (sort keys %{$hash1}) {
+        if (exists $hash2->{$path}) {
+            if ($hash2->{$path}->{body} eq $hash1->{$path}->{body}) {
+                printf STDERR "%s => %s is duplicate\n", $path, $hash1->{$path}->{title};
+                $new->{$path} = delete $hash2->{$path};
+                delete $hash1->{$path};
+            }
+            else {
+                printf STDERR "%s => %s is different\n", $path, $hash1->{$path}->{title};
+                $new->{$path} = delete $hash1->{$path};
+                $new->{$path . 2} = delete $hash2->{$path};
+            }
+        }
+        else {
+            printf STDERR "%s => %s is missing in hash2\n", $path, $hash1->{$path}->{title};
+            $new->{$path} = delete $hash1->{$path};
+        }
+    }
+
+    # store any lefovers of hash1
+    foreach my $path (sort keys %{$hash1}) {
+        printf STDERR "%s => %s is left in hash1\n", $path, $hash1->{$path}->{title};
+        $new->{$path} = $hash1->{$path};
+    }
+
+    # store any lefovers of hash2
+    foreach my $path (sort keys %{$hash2}) {
+        printf STDERR "%s => %s is left in hash2\n", $path, $hash2->{$path}->{title};
+        $new->{$path} = $hash2->{$path};
+    }
+
+    return $new
+}
+
+sub hashify {
+    # create new hash with path+title as key instead of id's
+    my $data = shift;
+    my $new = {};
+
+    foreach my $id (keys %{$data} ) {
+        my $path = $data->{$id}->{path} . '|' . $data->{$id}->{title};
+        if (exists $new->{$path}) {
+            die "$path already exists!\n";
+        }
+        else {
+            $new->{$path} = $data->{$id};
+        }
+    }
+
+    return $new;
+}
+