Hashar has uploaded a new change for review. (
https://gerrit.wikimedia.org/r/335374 )
Change subject: Extract hash mecanism to a standalone method
......................................................................
Extract hash mecanism to a standalone method
The hashing mecanism and cache invalidation via $wgTimelineFileBackend
is self contained. Move it to a new public method Timeline::hash().
Add tests for all cases.
Slightly document renderTimeline() while at it.
Bug: T138036
Change-Id: Ic8cb4e448323cf741eac0efd7e903e352c1a67d8
---
M Timeline.body.php
A tests/phpunit/Timeline_hash_Test.php
2 files changed, 71 insertions(+), 8 deletions(-)
git pull ssh://gerrit.wikimedia.org:29418/mediawiki/extensions/timeline
refs/changes/74/335374/1
diff --git a/Timeline.body.php b/Timeline.body.php
index 8cc9519..a69a744 100644
--- a/Timeline.body.php
+++ b/Timeline.body.php
@@ -14,6 +14,15 @@
}
/**
+ * Render timeline and save to file backend
+ *
+ * Files are saved to the file backend $wgTimelineFileBackend if set.
Else
+ * default to FSFileBackend named 'timeline-backend'.
+ *
+ * The rendered timeline is saved in the file backend using @see hash()
and
+ * will be reused if the hash match. You can invalidate the cache by
+ * setting the global variable $wgRenderHashAppend (default: '').
+ *
* @param $timelinesrc string
* @param $args array
* @param Parser $parser
@@ -22,7 +31,7 @@
* @return string HTML
*/
public static function renderTimeline( $timelinesrc, array $args,
$parser, $frame ) {
- global $wgUploadDirectory, $wgUploadPath, $wgArticlePath,
$wgTmpDirectory, $wgRenderHashAppend;
+ global $wgUploadDirectory, $wgUploadPath, $wgArticlePath,
$wgTmpDirectory;
global $wgTimelineFileBackend, $wgTimelineEpochTimestamp,
$wgTimelinePerlCommand, $wgTimelineFile;
global $wgTimelineFontFile, $wgTimelinePloticusCommand;
@@ -48,13 +57,7 @@
);
}
- // Get a hash of the plot data.
- // $args must be checked, because the same source text may be
used with
- // with different args.
- $hash = md5( $timelinesrc . implode( '', $args ) );
- if ( $wgRenderHashAppend != '' ) {
- $hash = md5( $hash . $wgRenderHashAppend );
- }
+ $hash = self::hash( $timelinesrc, $args );
// Storage destination path (excluding file extension)
$fname = 'mwstore://' . $backend->getName() .
"/timeline-render/$hash";
@@ -203,6 +206,31 @@
}
/**
+ * Generate a hash of the plot data
+ *
+ * $args must be checked, because the same source text may be used with
+ * different arguments.
+ *
+ * Uses global $wgRenderHashAppend to salt / vary the hash. Will
invalidate
+ * the cache as a side effect though old files will be left in the file
+ * backend.
+ *
+ * @param $timelinesrc string
+ * @param $args array
+ * @return string hash
+ */
+ public static function hash( $timelinesrc, array $args ) {
+ global $wgRenderHashAppend;
+
+ $hash = md5( $timelinesrc . implode( '', $args ) );
+ if ( $wgRenderHashAppend != '' ) {
+ $hash = md5( $hash . $wgRenderHashAppend );
+ }
+
+ return $hash;
+ }
+
+ /**
* Do a security check on the image map HTML
* @param $html string
* @return string HTML
diff --git a/tests/phpunit/Timeline_hash_Test.php
b/tests/phpunit/Timeline_hash_Test.php
new file mode 100644
index 0000000..1f7c7c4
--- /dev/null
+++ b/tests/phpunit/Timeline_hash_Test.php
@@ -0,0 +1,35 @@
+<?php
+class TimelineHashTest extends MediaWikiTestCase {
+
+ /**
+ * @dataProvider provideHashCases
+ */
+ public function testHash( $expected, $timelinesrc, $args = [],
$hashAppend ) {
+ $this->setMwGlobals( 'wgRenderHashAppend', $hashAppend );
+
+ $this->assertEquals(
+ $expected,
+ Timeline::hash( $timelinesrc, $args )
+ );
+ }
+
+ public static function provideHashCases() {
+ $NO_APPEND = '';
+
+ return [
+ 'no arguments' => [
+ md5( 'hello' ), 'hello', [], $NO_APPEND ],
+ 'no arguments and $wgRenderHashAppend' => [
+ md5( md5( 'hello' ) . 'World' ), 'hello', [],
'World' ],
+ 'with two arguments' => [
+ md5( 'helloarg1arg2' ), 'hello',
+ [ 'arg1', 'arg2' ], $NO_APPEND
+ ],
+ 'with two arguments and $wgRenderHashAppend' => [
+ md5( md5( 'helloarg1arg2' ) . 'World' ),
'hello',
+ [ 'arg1', 'arg2' ], 'World'
+ ],
+ ];
+ }
+
+}
--
To view, visit https://gerrit.wikimedia.org/r/335374
To unsubscribe, visit https://gerrit.wikimedia.org/r/settings
Gerrit-MessageType: newchange
Gerrit-Change-Id: Ic8cb4e448323cf741eac0efd7e903e352c1a67d8
Gerrit-PatchSet: 1
Gerrit-Project: mediawiki/extensions/timeline
Gerrit-Branch: master
Gerrit-Owner: Hashar <[email protected]>
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