222 lines
6.8 KiB
PHP
222 lines
6.8 KiB
PHP
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<?PHP
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/**
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* Main file for functions.
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*
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* @file
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*
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* @author Joshua Ramon Enslin <joshua@jrenslin.de>
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*/
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/**
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* Function ensureDir checks if a directory exists, and creates it if it does not yet.
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*
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* @param string $filepath File path.
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*
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* @return void
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*/
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function ensureDir(string $filepath) {
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if (!is_dir($filepath)) mkdir($filepath);
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}
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/**
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* Function ensureJson checks that a JSON file exists. If not, it creates an empty one at the specified location.
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*
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* @param string $filepath File path to the JSON file.
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*
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* @return void
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*/
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function ensureJson(string $filepath) {
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if (!file_exists($filepath) or filesize($filepath) < 2) {
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file_put_contents($filepath, "[]");
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}
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}
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/**
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* Function for ensuring the existence of an appropriate environment.
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*
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* @return void
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*/
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function ensureEnvironment() {
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// Enable error reporting
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error_reporting(E_ALL);
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ini_set("display_errors", 1);
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// Ensure existence of directories
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foreach ([__DIR__ . "/../data", __DIR__ . "/../data/static", __DIR__ . "/../data/caches", __DIR__ . "/../js"] as $folder) {
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ensureDir($folder);
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}
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// Ensure existence of settings files
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foreach ([
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__DIR__ . "/../data/settings.json",
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__DIR__ . "/../data/caches/pages.json",
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__DIR__ . "/../data/users.json",
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] as $jsonFile) {
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ensureJson($jsonFile);
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}
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}
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/**
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* Function scanDirConts is a wrapper around scandir(), which removes [".", ".."].
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*
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* @param string $folder Folder to scan.
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*
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* @return string[]
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*/
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function scanDirConts(string $folder):array {
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return array_values(array_diff(scandir($folder), [".", "..", ".git"]));
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}
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/**
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* Function printHiddenInputs takes an array, in which each entry stands for a new hidden input field.
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* The key to the entry stands for the name attribute, the value for the value attribute.
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*
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* @param array $array Associative array containing all the variable names and corresponding values to print
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* @param int $indent Integer describing how far each line in the returned string should be indented.
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*
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* @return string
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*/
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function printHiddenInputs(array $array, int $indent = 0):string {
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$output = '';
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$indentString = PHP_EOL;
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for ($i = 0; $i < $indent; $i++) $indentString .= ' ';
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foreach ($array as $name => $value) {
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$output .= $indentString . '<input type="hidden" name="'.$name.'" value="'.$value.'" />';
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}
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return $output;
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}
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/**
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* Function printHiddenInputsFromGlobalsSimple takes an array, in which each entry stands for a new hidden input field.
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* The value stands for the name attribute of the input field and the key in $GLOBALS.
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*
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* @param array $array Input array.
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* @param int $indent Number of spaces for indenting the output input fields in HTML. Optional.
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*
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* @return string
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*/
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function printHiddenInputsFromGlobalsSimple(array $array, int $indent = 0):string {
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$output = '';
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$indentString = PHP_EOL;
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for ($i = 0; $i < $indent; $i++) $indentString .= ' ';
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foreach ($array as $value) {
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if (!isset($GLOBALS[$value])) continue;
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$output .= $indentString . '<input type="hidden" name="'.$value.'" value="'.$GLOBALS[$value].'" />';
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}
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return $output;
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}
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/**
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* Function write_get_vars prints checks for GET variables specified in the input array and returns them as a single string.
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* Useful for avoiding long blocks of links working to write meaningful links.
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*
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* @param string[] $input Input array: both simple and associative arrays are accepted.
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*
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* @return string
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*/
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function write_get_vars(array $input):string {
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// Check if keys have been specified in the array (in Python terms, if it is a dict or a list).
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// If keys are not specified, write new working variable $vars with keys equaling the value.
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// $str is the string that will eventually be returned.
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$vars = array();
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$str = '';
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if (isset($input[0])) {
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foreach ($input as $value) $vars[$value] = $value;
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}
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else $vars = $input;
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// For each of the variables specified in $vars, check if a corresponding GET variable is set.
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// If so, add that to the return string.
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// The key is used in place of the original GET variable's name ($value),
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// because some pages may have the same GET variables carry different names.
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foreach ($vars as $key => $value) {
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if (isset($GLOBALS['_GET'][$value])) $str .= '&'.$key.'='.$GLOBALS['_GET'][$value];
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}
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return ($str);
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}
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/**
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* Function write_post_vars prints checks for POST variables specified in the input
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* array and returns them as a single string.
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* Useful for avoiding long blocks of links working to write meaningful links.
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*
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* @param string[] $input Input array: both simple and associative arrays are accepted.
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*
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* @return string
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*/
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function write_post_vars(array $input):string {
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// Check if keys have been specified in the array (in Python terms, if it is a dict or a list).
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// If keys are not specified, write new working variable $vars with keys equaling the value.
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// $str is the string that will eventually be returned.
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$vars = array();
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$str = '';
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if (isset($input[0])) {
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foreach ($input as $value) $vars[$value] = $value;
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}
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else $vars = $input;
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// For each of the variables specified in $vars, check if a corresponding GET variable is set.
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// If so, add that to the return string. The key is used in place of the original POST variable's name ($value),
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// because some pages may have the same GET variables carry different names.
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foreach ($vars as $key => $value) {
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if (isset($GLOBALS['_POST'][$value])) $str .= '&'.$key.'='.$GLOBALS['_POST'][$value];
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}
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return ($str);
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}
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/**
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* Function write_common_vars prints checks for global variables specified in the input
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* array and returns them as a single string.
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* Useful for avoiding long blocks of links working to write meaningful links.
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*
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* @param string[] $input Input array: both simple and associative arrays are accepted.
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*
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* @return string
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*/
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function write_common_vars(array $input):string {
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// Check if keys have been specified in the array (in Python terms, if it is a dict or a list).
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// If keys are not specified, write new working variable $vars with keys equaling the value.
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// $str is the string that will eventually be returned.
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$vars = array();
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$str = '';
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if (isset($input[0])) {
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foreach ($input as $value) $vars[$value] = $value;
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}
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else $vars = $input;
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// For each of the variables specified in $vars, check if a corresponding GET variable is set.
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// If so, add that to the return string. The key is used in place of the original GET variable's name ($value),
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// because some pages may have the same GET variables carry different names.
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foreach ($vars as $key => $value) {
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if (isset($GLOBALS[$value])) $str .= '&'.$key.'='.$GLOBALS[$value];
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}
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return ($str);
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}
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?>
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