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<?php namespace Simondubois\UnsplashDownloader; |
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use Exception; |
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/** |
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* A proxy to handle history operations like : |
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* - loading history from file |
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* - checking existence of a entity in history |
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* - appending data to history |
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* - saving history to file |
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*/ |
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class History |
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{ |
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// |
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// Attributes |
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// |
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/** |
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* Has a file content been loaded |
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* @var bool |
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*/ |
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private $loaded = false; |
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/** |
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* Path of the file to use for history |
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* @var string |
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*/ |
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private $path; |
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/** |
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* History content |
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* @var array |
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*/ |
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private $content = []; |
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// |
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// Getters |
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// |
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/** |
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* Get path attribute |
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* @return string Path to file |
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*/ |
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public function getPath() |
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{ |
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return $this->path; |
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} |
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/** |
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* Get content attribute |
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* @return array Content data |
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*/ |
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public function getContent() |
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{ |
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return $this->content; |
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} |
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// |
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// File handling |
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// |
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/** |
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* Read and parse file content |
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* @param string|null $path Path to file |
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* @return bool True if the file has been successfully loaded |
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*/ |
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public function load($path) { |
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if ($this->loaded) { |
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throw new Exception('The file '.$this->path.' has already been loaded into history'); |
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} |
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$this->path = $path; |
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if ($this->loadContent()) { |
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$this->loaded = true; |
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} |
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return $this->loaded; |
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} |
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/** |
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* Save content to file |
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* @return bool True if the file has been successfully saved |
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*/ |
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public function save() { |
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if ($this->loaded === false) { |
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return false; |
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} |
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return $this->saveContent(); |
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} |
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// |
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// Content handling |
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// |
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/** |
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* Check if a string is in history |
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* @param string $str String to look for |
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* @return bool True if the string has been found in history |
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*/ |
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public function has($str) |
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{ |
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return $this->loaded && in_array($str, $this->content); |
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} |
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/** |
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* Append a string to the history |
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* @param string $str String to add to history |
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*/ |
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public function put($str) |
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{ |
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$this->content[] = $str; |
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} |
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/** |
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* Load file content into content attribute |
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* @return bool True if the file has been successfully loaded |
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*/ |
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private function loadContent() { |
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$content = @file($this->path, FILE_IGNORE_NEW_LINES); |
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if ($content === false) { |
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return false; |
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} |
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$this->content = $content; |
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return true; |
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} |
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/** |
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* Save content attribute into file |
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* @return bool True if the file has been successfully saved |
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*/ |
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private function saveContent() { |
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$content = implode(PHP_EOL, $this->content); |
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$writtenBytes = file_put_contents($this->path, $content); |
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return is_int($writtenBytes); |
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} |
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} |
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simondubois /
unsplash-downloader
