Language::getTranslationsFromFile()

Complexity

Conditions	12
Paths	98

Size

Total Lines	117
Code Lines	57

Duplication

Lines	0
Ratio	0 %

Importance

Changes

0

<?php
	public function getTranslationsFromFile($filename) {
		if (!is_file($filename)) {
			return false;
		}

		$fp = fopen($filename, 'r');
		if (!$fp) {

$fp is of type resource, thus it always evaluated to false.

			return false;
		}

		// Get number of strings in .mo file
		fseek($fp, 8, SEEK_SET);
		$num_of_str = unpack('Lnum', fread($fp, 4));
		$num_of_str = $num_of_str['num'];

		// Get offset to table with original strings
		fseek($fp, 12, SEEK_SET);
		$offset_orig_tbl = unpack('Loffset', fread($fp, 4));
		$offset_orig_tbl = $offset_orig_tbl['offset'];

		// Get offset to table with translation strings
		fseek($fp, 16, SEEK_SET);
		$offset_transl_tbl = unpack('Loffset', fread($fp, 4));
		$offset_transl_tbl = $offset_transl_tbl['offset'];

		// The following arrays will contain the length and offset of the strings
		$data_orig_strs = [];
		$data_transl_strs = [];

		/*
		 * Get the length and offset to the original strings by using the table
		 * with original strings
		 */
		// Set pointer to start of orig string table
		fseek($fp, $offset_orig_tbl, SEEK_SET);
		for ($i = 0; $i < $num_of_str; ++$i) {
			// Length 4 bytes followed by offset 4 bytes
			$length = unpack('Llen', fread($fp, 4));
			$offset = unpack('Loffset', fread($fp, 4));
			$data_orig_strs[$i] = ['length' => $length['len'], 'offset' => $offset['offset']];
		}

		/*
		 * Get the length and offset to the translation strings by using the table
		 * with translation strings
		 */
		// Set pointer to start of translations string table
		fseek($fp, $offset_transl_tbl, SEEK_SET);
		for ($i = 0; $i < $num_of_str; ++$i) {
			// Length 4 bytes followed by offset 4 bytes
			$length = unpack('Llen', fread($fp, 4));
			$offset = unpack('Loffset', fread($fp, 4));
			$data_transl_strs[$i] = ['length' => $length['len'], 'offset' => $offset['offset']];
		}

		// This array will contain the actual original and translation strings
		$translation_data = [];

		// Get the original strings using the length and offset
		for ($i = 0, $len = count($data_orig_strs); $i < $len; ++$i) {
			$translation_data[$i] = [];

			// Set pointer to the offset of the string
			fseek($fp, $data_orig_strs[$i]['offset'], SEEK_SET);

			// Set default values for context and plural forms
			$translation_data[$i]['msgctxt'] = false;
			$translation_data[$i]['msgid_plural'] = false;

			if ($data_orig_strs[$i]['length'] > 0) {	// fread does not accept length=0
				$length = $data_orig_strs[$i]['length'];
				$orig_str = unpack('a' . $length . 'str', fread($fp, $length));
				$translation_data[$i]['msgid'] = $orig_str['str'];	// unpack converts to array :S

				// Find context in the original string
				if (str_contains((string) $translation_data[$i]['msgid'], "\004")) {
					$contextSplit = explode("\004", (string) $translation_data[$i]['msgid']);
					$translation_data[$i]['msgctxt'] = $contextSplit[0];
					$translation_data[$i]['msgid'] = $contextSplit[1];
				}
				// Find plural forms in the original string
				if (str_contains((string) $translation_data[$i]['msgid'], "\0")) {
					$original = explode("\0", (string) $translation_data[$i]['msgid']);
					$translation_data[$i]['msgid'] = $original[0];
					$translation_data[$i]['msgid_plural'] = $original[1];
				}
			}
			else {
				$translation_data[$i]['msgid'] = '';
			}
		}

		// Get the translation strings using the length and offset
		for ($i = 0, $len = count($data_transl_strs); $i < $len; ++$i) {
			// Set pointer to the offset of the string
			fseek($fp, $data_transl_strs[$i]['offset'], SEEK_SET);
			if ($data_transl_strs[$i]['length'] > 0) {	// fread does not accept length=0
				$length = $data_transl_strs[$i]['length'];
				$trans_str = unpack('a' . $length . 'str', fread($fp, $length));
				$translation_data[$i]['msgstr'] = $trans_str['str'];	// unpack converts to array :S

				// If there are plural forms in the source string,
				// then the translated string must contain plural
				// forms as well.  We cannot depend on a \0 being
				// present at all times, because languages that
				// have only one plural form won't have this
				// (e.g. Japanese)
				if ($translation_data[$i]['msgid_plural'] !== false) {
					$translation_data[$i]['msgstr'] = explode("\0", (string) $translation_data[$i]['msgstr']);
				}
			}
			else {
				$translation_data[$i]['msgstr'] = '';
			}
		}

		return $translation_data;
	}