Added writer for ASS files

src/ChaosTangent/ASS/Block/Block.php

@@ -97,7 +97,7 @@ public function removeLine(Line $line)
     }
 
     /**
-     * @return array
+     * @return Line[]
      */
     public function getLines()
     {

src/ChaosTangent/ASS/Line/Line.php

@@ -160,4 +160,8 @@ public function getValue()
     protected function doParse($value, array $mapping)
     {
     }
+
+    public function toString($mapping = []) {
+        return $this->key.': '.$this->value;
+    }
 }

src/ChaosTangent/ASS/Line/MappedLine.php

@@ -54,6 +54,25 @@ public function applyMapping($value, array $mapping)
         }
     }
 
+    /**
+     * With a string value and an array mapping, map values to this class
+     *
+     * @param string $value
+     * @param array $mapping
+     */
+    public function reverseMapping($mapping)
+    {
+        $classMapping = $this->getMapping();
+
+        $string = '';
+        foreach ($mapping as $attribute) {
+            $id = $classMapping[$attribute];
+            $string .= $this->{$id}.',';
+        }
+
+        return trim($string, ',');
+    }
+
     /**
      * {@inheritDoc}
      */
@@ -66,4 +85,12 @@ protected function doParse($value, array $mapping)
 
         $this->applyMapping($value, $mapping);
     }
+
+    public function toString($mapping = []) {
+        if (count($mapping)) {
+            return $this->getKey() . ': ' . $this->reverseMapping($mapping);
+        } else {
+            return parent::toString();
+        }
+    }
 }

src/ChaosTangent/ASS/Reader.php

@@ -31,5 +31,12 @@ public function fromFile($filename)
 
     public function fromString($string)
     {
+        $script = new Script($string);
+        if (!$script->isASSScript()) {
+            throw new InvalidScriptException($script, 'Passed string does not look like a script');
+        }
+
+        $script->parse();
+        return $script;
     }
 }

src/ChaosTangent/ASS/Script.php

@@ -157,7 +157,7 @@ public function hasBlock($block)
     /**
      * Get blocks
      *
-     * @return array An array of blocks
+     * @return Block[] An array of blocks
      */
     public function getBlocks()
     {

src/ChaosTangent/ASS/Writer.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace ChaosTangent\ASS;
+
+use ChaosTangent\ASS\Exception\InvalidScriptException;
+use ChaosTangent\ASS\Line\Format;
+
+/**
+ * Advanced Sub Station Alpha file reader
+ *
+ * @author John Noel <john.noel@chaostangent.com>
+ * @package php-ass
+ */
+class Writer
+{
+    const VERSION = '1.0.0';
+
+    public function toFile($filename, Script $script)
+    {
+        if (!file_exists($filename) || !is_writable($filename)) {
+            throw new \InvalidArgumentException('Unable to write file: '.$filename);
+        }
+
+        file_put_contents($filename, $this->toString($script));
+    }
+
+    public function toString(Script $script)
+    {
+        $string = '';
+
+        foreach($script->getBlocks() as $block) {
+            $string .= sprintf("[%s]\n", $block->getId());
+            foreach($block->getLines() as $line) {
+                $mapping = [];
+                if ($line instanceof Format) {
+                    $mapping = $line->getMapping();
+                }
+                $value = $line->toString($mapping);
+                $string .= sprintf("%s\n", $value);
+            }
+        }
+
+        return $string;
+    }
+}

tests/ChaosTangent/ASS/ScriptTest.php

@@ -1,8 +1,10 @@
 <?php
 
+use ChaosTangent\ASS\Reader;
 use ChaosTangent\ASS\Script;
 use ChaosTangent\ASS\Exception\InvalidScriptException;
 use ChaosTangent\ASS\Block\ScriptInfo;
+use ChaosTangent\ASS\Writer;
 
 /**
  * Script test
@@ -121,4 +123,34 @@ public function testIterator()
 
         $this->assertContains($block, $script);
     }
+
+    /**
+     * @dataProvider scriptFiles
+     */
+    public function testReadWrite($file, $expectedResultFile)
+    {
+        $outputPath = __DIR__.'/../../scripts/'.$expectedResultFile;
+        $expectedContent = file_get_contents($outputPath);
+
+        $reader = new Reader();
+        $script = $reader->fromFile(__DIR__.'/../../scripts/'.$file);
+
+        $writer = new Writer();
+        $newcontent = $writer->toString($script);
+
+        /*
+         * Expected output is not exactly the same as input, since we remove
+         * irrelevant information from the file (e.g. extra line feeds, comments and
+         * code that might've been added by editors).
+         */
+        $this->assertEquals($expectedContent, $newcontent);
+    }
+
+    public function scriptFiles() {
+        return [
+            [ 'utf8.ass', 'utf8_output.ass' ],
+            [ 'small.ass', 'small_output.ass' ],
+            [ 'minimal.ass', 'minimal_output.ass' ]
+        ];
+    }
 }

tests/scripts/minimal_output.ass

@@ -0,0 +1,7 @@
+[Script Info]
+Title: Minimal script
+ScriptType: v4.00+
+WrapStyle: 0
+ScaledBorderAndShadow: yes
+PlayResX: 1280
+PlayResY: 720

tests/scripts/small_output.ass

@@ -0,0 +1,36 @@
+[Script Info]
+Title: Default Aegisub file
+ScriptType: v4.00+
+WrapStyle: 0
+ScaledBorderAndShadow: yes
+YCbCr Matrix: TV.601
+PlayResX: 1280
+PlayResY: 720
+[V4+ Styles]
+Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
+Style: ED_Romaji,Minion Pro Cond,48,&H00000000,&H000000FF,&H00FFFFFF,&H00000000,-1,0,0,0,100,100,0,0,1,2,0,7,40,40,32,1
+Style: ED_English,Minion Pro Cond,48,&H00000000,&H000000FF,&H00FFFFFF,&H00000000,-1,0,0,0,100,100,0,0,1,2,0,1,42,42,28,1
+[Events]
+Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
+Dialogue: 0,0:00:00.98,0:00:05.43,ED_English,,0,0,0,,{\fad(100,200)\blur5\c&H000010&\3c&H80A0C0&}My destiny,
+Dialogue: 0,0:00:05.42,0:00:10.56,ED_Romaji,,0,0,0,,{\fad(100,200)\blur5\c&H000010&\3c&H80A0C0&}sotto oshiete hoshii
+Dialogue: 0,0:00:05.43,0:00:10.57,ED_English,,0,0,0,,{\fad(100,200)\blur5\c&H000010&\3c&H80A0C0&}won't you tell me?
+Dialogue: 0,0:00:12.74,0:00:16.00,ED_Romaji,,0,0,0,,{\fad(100,200)\blur5\c&H000010&\3c&H80A0C0&}aenai
+Dialogue: 0,0:00:12.75,0:00:16.01,ED_English,,0,0,0,,{\fad(100,200)\blur5\c&H000010&\3c&H80A0C0&}But you're gone
+Dialogue: 0,0:00:17.05,0:00:21.43,ED_Romaji,,0,0,0,,{\fad(100,200)\blur5\c&H000010&\3c&H80A0C0&}ima wa tooi place to be
+Dialogue: 0,0:00:17.06,0:00:21.44,ED_English,,0,0,0,,{\fad(100,200)\blur5\c&H000010&\3c&H80A0C0&}in a place so far away
+Dialogue: 0,0:00:24.51,0:00:29.40,ED_Romaji,,0,0,0,,{\fad(100,200)\blur5\c&H000010&\3c&H80A0C0&}hitoribocchi todokanai
+Dialogue: 0,0:00:24.52,0:00:29.41,ED_English,,0,0,0,,{\fad(100,200)\blur5\c&H000010&\3c&H80A0C0&}Alone and never-reaching
+Dialogue: 0,0:00:29.97,0:00:35.55,ED_Romaji,,0,0,0,,{\fad(100,200)\blur5\c&H000010&\3c&H80A0C0&}oshietekureta the truth is free
+Dialogue: 0,0:00:29.98,0:00:35.56,ED_English,,0,0,0,,{\fad(100,200)\blur5\c&H000010&\3c&H80A0C0&}Yet you told me the truth is free
+Dialogue: 0,0:00:35.56,0:00:38.44,ED_English,,0,0,0,,{\fad(100,200)\blur5\c&H000010&\3c&H80A0C0&}I miss you
+Dialogue: 0,0:00:38.44,0:00:41.05,ED_English,,0,0,0,,{\fad(100,200)\blur5\c&H000010&\3c&H80A0C0&}I revere you
+Dialogue: 0,0:00:41.05,0:00:48.04,ED_English,,0,0,0,,{\fad(100,200)\blur5\c&H000010&\3c&H80A0C0&\t(0,1500,\c&H281E1D&\3c&HF9CFC2&)}You're my everything
+Dialogue: 0,0:00:48.91,0:00:54.27,ED_English,,0,0,0,,{\fad(100,200)\blur5\c&H281E1D&\3c&HF9CFC2&}I will follow you
+Dialogue: 0,0:00:54.26,0:01:00.22,ED_Romaji,,0,0,0,,{\fad(100,200)\blur5\c&H281E1D&\3c&HF9CFC2&}subete wa ano toki
+Dialogue: 0,0:00:54.27,0:01:00.23,ED_English,,0,0,0,,{\fad(100,200)\blur5\c&H281E1D&\3c&HF9CFC2&}For everything since then
+Dialogue: 0,0:01:00.23,0:01:05.89,ED_English,,0,0,0,,{\fad(100,200)\blur5\c&H281E1D&\3c&HF9CFC2&}You're my destiny
+Dialogue: 0,0:01:05.88,0:01:10.07,ED_Romaji,,0,0,0,,{\fad(100,200)\blur5\c&H281E1D&\3c&HF9CFC2&}tsuretette
+Dialogue: 0,0:01:05.89,0:01:10.08,ED_English,,0,0,0,,{\fad(100,200)\blur5\c&H281E1D&\3c&HF9CFC2&}So take me
+Dialogue: 0,0:01:10.07,0:01:16.82,ED_Romaji,,0,0,0,,{\fad(100,200)\blur5\c&H281E1D&\3c&HF9CFC2&}yakusoku no basho e
+Dialogue: 0,0:01:10.08,0:01:16.83,ED_English,,0,0,0,,{\fad(100,200)\blur5\c&H281E1D&\3c&HF9CFC2&}to our promised land