Initial import from Alltube app

Removed dependency on Config and LocaleManager classes
Avoid using generic exceptions

classes/exceptions/AlltubeLibraryException.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace Alltube\Library\Exception;
+
+use Exception;
+
+/**
+ * Base class for Alltube exceptions.
+ */
+abstract class AlltubeLibraryException extends Exception
+{
+
+}

classes/exceptions/AvconvException.php

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+<?php
+
+namespace Alltube\Library\Exception;
+
+use Throwable;
+
+/**
+ * Can't find avconv or ffmpeg.
+ */
+class AvconvException extends AlltubeLibraryException
+{
+    /**
+     * AvconvException constructor.
+     * @param string $path Path to avconv or ffmpeg.
+     */
+    public function __construct($path)
+    {
+        parent::__construct("Can't find avconv or ffmpeg at " . $path . '.');
+    }
+}

classes/exceptions/EmptyUrlException.php

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+<?php
+
+/**
+ * EmptyUrlException class.
+ */
+
+namespace Alltube\Library\Exception;
+
+/**
+ * Exception thrown when youtube-dl returns an empty URL.
+ */
+class EmptyUrlException extends AlltubeLibraryException
+{
+    /**
+     * @var string Error message
+     */
+    protected $message = 'youtube-dl returned an empty URL.';
+}

classes/exceptions/InvalidProtocolConversionException.php

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+<?php
+
+namespace Alltube\Library\Exception;
+
+/**
+ * Invalid conversion.
+ */
+class InvalidProtocolConversionException extends AlltubeLibraryException
+{
+    /**
+     * InvalidProtocolConversionException constructor.
+     * @param string $protocol Protocol
+     */
+    public function __construct($protocol)
+    {
+        parent::__construct($protocol . ' protocol is not supported in conversions.');
+    }
+}

classes/exceptions/InvalidTimeException.php

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+<?php
+
+namespace Alltube\Library\Exception;
+
+/**
+ * Invalid time.
+ */
+class InvalidTimeException extends AlltubeLibraryException
+{
+
+    /**
+     * InvalidTimeException constructor.
+     * @param string $time Invalid time
+     */
+    public function __construct($time)
+    {
+        parent::__construct('Invalid time: ' . $time);
+    }
+}

classes/exceptions/PasswordException.php

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+<?php
+
+/**
+ * PasswordException class.
+ */
+
+namespace Alltube\Library\Exception;
+
+/**
+ * Exception thrown when a video requires a password.
+ */
+class PasswordException extends AlltubeLibraryException
+{
+}

classes/exceptions/PlaylistConversionException.php

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+<?php
+
+namespace Alltube\Library\Exception;
+
+/**
+ * Conversion of playlists is not supported.
+ */
+class PlaylistConversionException extends AlltubeLibraryException
+{
+    /**
+     * @var string Error message
+     */
+    protected $message = 'Conversion of playlists is not supported.';
+}

classes/exceptions/PopenStreamException.php

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+<?php
+
+namespace Alltube\Library\Exception;
+
+/**
+ * Could not open popen stream.
+ */
+class PopenStreamException extends AlltubeLibraryException
+{
+    /**
+     * @var string Error message
+     */
+    protected $message = 'Could not open popen stream.';
+}

classes/exceptions/RemuxException.php

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+<?php
+
+namespace Alltube\Library\Exception;
+
+/**
+ * Generic remux exception.
+ */
+class RemuxException extends AlltubeLibraryException
+{
+}

classes/exceptions/WrongPasswordException.php

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+<?php
+
+namespace Alltube\Library\Exception;
+
+/**
+ * Wrong password.
+ */
+class WrongPasswordException extends AlltubeLibraryException
+{
+    /**
+     * @var string Error message.
+     */
+    protected $message = 'Wrong password.';
+}

classes/exceptions/YoutubedlException.php

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+<?php
+
+namespace Alltube\Library\Exception;
+
+/**
+ * Generic youtube-dl error.
+ */
+class YoutubedlException extends AlltubeLibraryException
+{
+}