From 1af272b1953718924b15dfa5b1f4ca458f102ea3 Mon Sep 17 00:00:00 2001
From: Michael Meier <michael.meier@fau.de>
Date: Tue, 29 Jan 2019 12:09:51 +0100
Subject: [PATCH] script for renaming from TMS tile-directory-scheme to OSM
 directory scheme.

---
 scripts/rename-tms-tiles.pl | 148 ++++++++++++++++++++++++++++++++++++
 1 file changed, 148 insertions(+)
 create mode 100755 scripts/rename-tms-tiles.pl

diff --git a/scripts/rename-tms-tiles.pl b/scripts/rename-tms-tiles.pl
new file mode 100755
index 0000000..7e41749
--- /dev/null
+++ b/scripts/rename-tms-tiles.pl
@@ -0,0 +1,148 @@
+#!/usr/bin/perl -w
+
+use File::Copy qw/copy move/;
+use Digest::file qw/digest_file_hex/;
+
+$moveinsteadofcopy = 0;
+$noreplace = 0;
+$skipvoidtiles = 0;
+$verblev = 2;
+
+@voidtilesizes = ( 334, 854 );
+@voidtilehashes = (
+                    '1cf52aed67c3ebf045f2fd2996ada35545517129e673dba00ef97c7d18275f144aa67b012556ec8a840fca158f6976e7cf30fcae030acd493e26e28fdff10ca3',
+                    '1feba96da5f6fa6049d7b40dc72295058eabb7e771040dedc8a69527046aa34fdaaf98e676ed8d02e95770dc635b5d4bf292fdd19be3c381847d3883995d3f3f',
+                    '609e45a0c39d961302ed560d9d8bffd798fdbcc912c3875c06ba1faa1fab83cce8d97f257d572138898d2d99fb5a7af80801080bb7be9688e029fce4a9c56f5f'
+                  );
+
+# Par. 0: Level on which this gets printed
+# Par. 1: Text
+sub printlev($$) {
+  if ($verblev >= $_[0]) {
+    print($_[1]);
+  }
+}
+
+sub showhelpandexit() {
+  print("Syntax: $0 sourcedirectoy destinationdirectory\n");
+  exit(1);
+}
+
+sub handlexdir($$$) {
+  my $z = $_[2];
+  my $srcdir = $_[0];
+  my $dstdir = $_[1];
+  my $dh;
+  unless (opendir($dh, $srcdir)) {
+    print(STDERR "failed to read sourcedirectoy '$srcdir' for zoomlevel $z.\n");
+    exit(1);
+  }
+  unless (-d $dstdir) {
+    printlev(2, "MKDIR 'dstdir'\n");
+    unless (mkdir($dstdir)) {
+      print(STDERR "Destination directory '$dstdir' for zoomlevel $z does not exist and could not be created: $!\n");
+      return;
+    }
+  }
+  while (my $de = readdir($dh)) {
+    if ($de =~ m/^(\d+)\.png$/) { # just a number dot png => handle this.
+      my $ynr = $1;
+      my $correctedynr = ((2 ** $z) - 1) - $ynr;
+      my $srcname = $srcdir . '/' . $de;
+      my $dstname = sprintf("%s/%d.png", $dstdir, $correctedynr);
+      if ($noreplace) {
+        if (-e $dstname) {
+          printlev(2, "SKIP '$srcname' ('$dstname' already exists)\n");
+          next;
+        }
+      }
+      if ($skipvoidtiles) {
+        my $fsize = -s $srcname;
+        if ($fsize ~~ @voidtilesizes) { # One of the relevant filesizes, no
+          # point in even computing the hash otherwise.
+          my $sha512 = digest_file_hex($srcname, "SHA-512");
+          printlev(3, "HASH $srcname -> $sha512\n");
+          if ($sha512 ~~ @voidtilehashes) { # OK, one of the void hashes -> skip
+            printlev(2, "SKIP '$srcname' (it has the hash of a void file)\n");
+            next;
+          }
+        }
+      }
+      if ($moveinsteadofcopy) {
+        printlev(2, "MOVE '$srcname' '$dstname'\n");
+        move($srcname, $dstname);
+      } else {
+        printlev(2, "COPY '$srcname' '$dstname'\n");
+        copy($srcname, $dstname);
+      }
+    }
+  }
+  closedir($dh);
+}
+
+sub handlezoomdir($$$) {
+  my $z = $_[2];
+  my $srcdir = $_[0] . '/' . $z;
+  my $dstdir = $_[1] . '/' . $z;
+  unless (-d $srcdir) {
+    printlev(1, "sourcedirectoy '$srcdir' for zoomlevel $z does not exist, skipping.\n");
+    return;
+  }
+  my $dh;
+  unless (opendir($dh, $srcdir)) {
+    print(STDERR "failed to read sourcedirectoy '$srcdir' for zoomlevel $z.\n");
+    exit(1);
+  }
+  unless (-d $dstdir) {
+    printlev(2, "MKDIR '$dstdir'\n");
+    unless (mkdir($dstdir)) {
+      print(STDERR "Destination directory '$dstdir' for zoomlevel $z does not exist and could not be created: $!\n");
+      exit(1);
+    }
+  }
+  while (my $de = readdir($dh)) {
+    if ($de =~ m/^\d+$/) { # just a number -> handle this directory.
+      handlexdir($srcdir . '/' . $de, $dstdir . '/' . $de, $z);
+    }
+  }
+  closedir($dh);
+}
+
+my $srcdir = undef;
+my $dstdir = undef;
+foreach $a (@ARGV) {
+  if ($a eq '--move') {
+    $moveinsteadofcopy = 1;
+  } elsif ($a eq '--noreplace') {
+    $noreplace = 1;
+  } elsif ($a eq '--skipvoidtiles') {
+    $skipvoidtiles = 1;
+  } elsif ($a eq '--help') {
+    showhelpandexit();
+  } elsif ($a eq '-q') {
+    $verblev--;
+  } elsif ($a eq '-v') {
+    $verblev++;
+  } else { # This will be interpreted as a directory name
+    if (!defined($srcdir)) {
+      $srcdir = $a;
+    } elsif (!defined($dstdir)) {
+      $dstdir = $a;
+    } else { # More than 2 directory names? That is wrong.
+      showhelpandexit();
+    }
+  }
+}
+unless (-d $srcdir) {
+  print(STDERR "Source directory '$srcdir' does not seem to exist or is not a directory?\n");
+  exit(1);
+}
+unless (-d $dstdir) {
+  unless (mkdir($dstdir)) {
+    print(STDERR "Destination directory '$dstdir' does not exist and could not be created: $!\n");
+    exit(1);
+  }
+}
+for (my $z = 0; $z < 30; $z++) {
+  handlezoomdir($srcdir, $dstdir, $z);
+}
-- 
2.25.1