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file.php
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file.php
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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* File handling in moodlecheck
*
* @package local_moodlecheck
* @copyright 2012 Marina Glancy
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die;
/**
* Handles one file being validated
*
* @package local_moodlecheck
* @copyright 2012 Marina Glancy
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class local_moodlecheck_file {
private const MODIFIERS = [T_ABSTRACT, T_PRIVATE, T_PUBLIC, T_PROTECTED, T_STATIC, T_VAR, T_FINAL, T_CONST];
protected $filepath = null;
protected $needsvalidation = null;
protected $errors = null;
protected $tokens = null;
protected $tokenscount = 0;
protected $classes = null;
protected $interfaces = null;
protected $traits = null;
protected $functions = null;
protected $filephpdocs = null;
protected $allphpdocs = null;
protected $variables = null;
protected $defines = null;
protected $constants = null;
/**
* Creates an object from path to the file
*
* @param string $filepath
*/
public function __construct($filepath) {
$this->filepath = str_replace(DIRECTORY_SEPARATOR, "/", $filepath);
}
/**
* Cleares all cached stuff to free memory
*/
protected function clear_memory() {
$this->tokens = null;
$this->tokenscount = 0;
$this->classes = null;
$this->interfaces = null;
$this->traits = null;
$this->functions = null;
$this->filephpdocs = null;
$this->allphpdocs = null;
$this->variables = null;
$this->defines = null;
$this->constants = null;
}
/**
* Returns true if this file is inside specified directory
*
* @param string $dirpath
* @return bool
*/
public function is_in_dir($dirpath) {
// Normalize dir path to also work with Windows style directory separators...
$dirpath = str_replace(DIRECTORY_SEPARATOR, "/", $dirpath);
if (substr($dirpath, -1) != '/') {
$dirpath .= '/';
}
return substr($this->filepath, 0, strlen($dirpath)) == $dirpath;
}
/**
* Retuns true if the file needs validation (is PHP file)
*
* @return bool
*/
public function needs_validation() {
if ($this->needsvalidation === null) {
$this->needsvalidation = true;
$pathinfo = pathinfo($this->filepath);
if (empty($pathinfo['extension']) || ($pathinfo['extension'] != 'php' && $pathinfo['extension'] != 'inc')) {
$this->needsvalidation = false;
}
}
return $this->needsvalidation;
}
/**
* Validates a file over registered rules and returns an array of errors
*
* @return array
*/
public function validate() {
if ($this->errors !== null) {
return $this->errors;
}
$this->errors = array();
if (!$this->needs_validation()) {
return $this->errors;
}
// If the file doesn't have tokens, has one or misses open tag, report it as one more error and stop processing.
if (!$this->get_tokens() ||
count($this->get_tokens()) === 1 ||
(isset($this->get_tokens()[0][0]) && $this->get_tokens()[0][0] !== T_OPEN_TAG)) {
$this->errors[] = array(
'line' => 1,
'severity' => 'error',
'message' => get_string('error_emptynophpfile', 'local_moodlecheck'),
'source' => 'Ø'
);
return $this->errors;
}
foreach (local_moodlecheck_registry::get_enabled_rules() as $code => $rule) {
$ruleerrors = $rule->validatefile($this);
if (count($ruleerrors)) {
$this->errors = array_merge($this->errors, $ruleerrors);
}
}
$this->clear_memory();
return $this->errors;
}
/**
* Return the filepath of the file.
*
* @return string
*/
public function get_filepath() {
return $this->filepath;
}
/**
* Returns a file contents converted to array of tokens.
*
* Each token is an array with two elements: code of token and text
* For simple 1-character tokens the code is -1
*
* @return array
*/
public function &get_tokens() {
if ($this->tokens === null) {
$source = file_get_contents($this->filepath);
$this->tokens = @token_get_all($source);
$this->tokenscount = count($this->tokens);
$inquotes = -1;
for ($tid = 0; $tid < $this->tokenscount; $tid++) {
if (is_string($this->tokens[$tid])) {
// Simple 1-character token.
$this->tokens[$tid] = array(-1, $this->tokens[$tid]);
}
// And now, for the purpose of this project we don't need strings with variables inside to be parsed
// so when we find string in double quotes that is split into several tokens and combine all content in one token.
if ($this->tokens[$tid][0] == -1 && $this->tokens[$tid][1] == '"') {
if ($inquotes == -1) {
$inquotes = $tid;
$this->tokens[$tid][0] = T_STRING;
} else {
$this->tokens[$inquotes][1] .= $this->tokens[$tid][1];
$this->tokens[$tid] = array(T_WHITESPACE, '');
$inquotes = -1;
}
} else if ($inquotes > -1) {
$this->tokens[$inquotes][1] .= $this->tokens[$tid][1];
$this->tokens[$tid] = array(T_WHITESPACE, '');
}
}
}
return $this->tokens;
}
/**
* Returns all artifacts (classes, interfaces, traits) found in file
*
* Returns 3 arrays (classes, interfaces and traits) of objects where each element represents an artifact:
* ->type : token type of the artifact (T_CLASS, T_INTERFACE, T_TRAIT)
* ->typestring : type of the artifact as a string ('class', 'interface', 'trait')
* ->name : name of the artifact
* ->tagpair : array of two elements: id of token { for the class and id of token } (false if not found)
* ->phpdocs : phpdocs for this artifact (instance of local_moodlecheck_phpdocs or false if not found)
* ->boundaries : array with ids of first and last token for this artifact.
* ->hasextends : boolean indicating whether this artifact has an `extends` clause
* ->hasimplements : boolean indicating whether this artifact has an `implements` clause
*
* @return array with 3 elements (classes, interfaces & traits), each being an array.
*/
public function get_artifacts() {
$types = array(T_CLASS, T_INTERFACE, T_TRAIT); // We are interested on these.
$artifacts = array_combine($types, $types);
if ($this->classes === null) {
$this->classes = array();
$this->interfaces = array();
$this->traits = array();
$tokens = &$this->get_tokens();
for ($tid = 0; $tid < $this->tokenscount; $tid++) {
if (isset($artifacts[$this->tokens[$tid][0]])) {
if ($this->previous_nonspace_token($tid) === "::") {
// Skip use of the ::class special constant.
continue;
}
if ($this->previous_nonspace_token($tid) == 'new') {
// This looks to be an anonymous class.
$tpid = $tid; // Let's keep the original $tid and use own for anonymous searches.
if ($this->next_nonspace_token($tpid) == '(') {
// It may be an anonymous class with parameters, let's skip them
// by advancing till we find the corresponding bracket closing token.
$level = 0; // To control potential nesting of brackets within the params.
while ($tpid = $this->next_nonspace_token($tpid, true)) {
if ($this->tokens[$tpid][1] == '(') {
$level++;
}
if ($this->tokens[$tpid][1] == ')') {
$level--;
// We are back to level 0, we are done (have walked over all params).
if ($level === 0) {
$tpid = $tpid;
break;
}
}
}
}
if ($this->next_nonspace_token($tpid) == '{') {
// An anonymous class in the format `new class {`.
continue;
}
if ($this->next_nonspace_token($tpid) == 'extends') {
// An anonymous class in the format `new class extends otherclasses {`.
continue;
}
if ($this->next_nonspace_token($tpid) == 'implements') {
// An anonymous class in the format `new class implements someinterface {`.
continue;
}
}
$artifact = new stdClass();
$artifact->type = $artifacts[$this->tokens[$tid][0]];
$artifact->typestring = $this->tokens[$tid][1];
$artifact->tid = $tid;
$artifact->name = $this->next_nonspace_token($tid);
$artifact->phpdocs = $this->find_preceeding_phpdoc($tid);
$artifact->tagpair = $this->find_tag_pair($tid, '{', '}');
$artifact->hasextends = false;
$artifact->hasimplements = false;
if ($artifact->tagpair) {
// Iterate over the remaining tokens in the class definition (until opening {).
foreach (array_slice($this->tokens, $tid, $artifact->tagpair[0] - $tid) as $token) {
if ($token[0] == T_EXTENDS) {
$artifact->hasextends = true;
}
if ($token[0] == T_IMPLEMENTS) {
$artifact->hasimplements = true;
}
}
}
$artifact->boundaries = $this->find_object_boundaries($artifact);
switch ($artifact->type) {
case T_CLASS:
$this->classes[] = $artifact;
break;
case T_INTERFACE:
$this->interfaces[] = $artifact;
break;
case T_TRAIT:
$this->traits[] = $artifact;
break;
}
}
}
}
return array(T_CLASS => $this->classes, T_INTERFACE => $this->interfaces, T_TRAIT => $this->traits);
}
/**
* Like {@see get_artifacts()}, but returns classes, interfaces and traits in a single flat array.
*
* @return stdClass[]
* @see get_artifacts()
*/
public function get_artifacts_flat(): array {
$artifacts = $this->get_artifacts();
return array_merge($artifacts[T_CLASS], $artifacts[T_INTERFACE], $artifacts[T_TRAIT]);
}
/**
* Returns all classes found in file
*
* Returns array of objects where each element represents a class:
* $class->name : name of the class
* $class->tagpair : array of two elements: id of token { for the class and id of token } (false if not found)
* $class->phpdocs : phpdocs for this class (instance of local_moodlecheck_phpdocs or false if not found)
* $class->boundaries : array with ids of first and last token for this class
*/
public function &get_classes() {
return $this->get_artifacts()[T_CLASS];
}
/**
* Returns all functions (including class methods) found in file
*
* Returns array of objects where each element represents a function:
* $function->tid : token id of the token 'function'
* $function->name : name of the function
* $function->phpdocs : phpdocs for this function (instance of local_moodlecheck_phpdocs or false if not found)
* TODO: Delete this because it's not used anymore (2023). See #97
* $function->class : containing class object (false if this is not a class method)
* $function->owner : containing artifact object (class, interface, trait, or false if this is not a method)
* $function->fullname : name of the function with class name (if applicable)
* $function->accessmodifiers : tokens like static, public, protected, abstract, etc.
* $function->tagpair : array of two elements: id of token { for the function and id of token } (false if not found)
* $function->argumentstoken : array of tokens found inside function arguments
* $function->arguments : array of function arguments where each element is array(typename, variablename)
* $function->boundaries : array with ids of first and last token for this function
*
* @return array
*/
public function &get_functions() {
if ($this->functions === null) {
$this->functions = array();
$tokens = &$this->get_tokens();
for ($tid = 0; $tid < $this->tokenscount; $tid++) {
if ($this->tokens[$tid][0] == T_USE) {
// Skip the entire use statement, to avoid interpreting "use function" as a function.
$tid = $this->end_of_statement($tid);
continue;
}
if ($this->tokens[$tid][0] == T_FUNCTION) {
$function = new stdClass();
$function->tid = $tid;
$function->fullname = $function->name = $this->next_nonspace_token($tid, false, array('&'));
// Skip anonymous functions.
if ($function->name == '(') {
continue;
}
$function->phpdocs = $this->find_preceeding_phpdoc($tid);
$function->class = $this->is_inside_class($tid);
$function->owner = $this->is_inside_artifact($tid);
if ($function->owner !== false) {
$function->fullname = $function->owner->name . '::' . $function->name;
}
$function->accessmodifiers = $this->find_access_modifiers($tid);
if (!in_array(T_ABSTRACT, $function->accessmodifiers)) {
$function->tagpair = $this->find_tag_pair($tid, '{', '}');
} else {
$function->tagpair = false;
}
$argumentspair = $this->find_tag_pair($tid, '(', ')', array('{', ';'));
if ($argumentspair !== false && $argumentspair[1] - $argumentspair[0] > 1) {
$function->argumentstokens = $this->break_tokens_by(
array_slice($tokens, $argumentspair[0] + 1, $argumentspair[1] - $argumentspair[0] - 1) );
} else {
$function->argumentstokens = array();
}
$function->arguments = array();
foreach ($function->argumentstokens as $argtokens) {
// If the token is completely empty then it's not an argument. This happens, for example, with
// trailing commas in parameters, allowed since PHP 8.0 and break_tokens_by() returns it that way.
if (empty($argtokens)) {
continue;
}
$type = null;
$variable = null;
$splat = false;
for ($j = 0; $j < count($argtokens); $j++) {
if ($argtokens[$j][0] == T_VARIABLE) {
$variable = ($splat) ? '...'.$argtokens[$j][1] : $argtokens[$j][1];
break;
} else if ($argtokens[$j][0] != T_WHITESPACE &&
$argtokens[$j][0] != T_ELLIPSIS && $argtokens[$j][1] != '&') {
$type = $argtokens[$j][1];
} else if ($argtokens[$j][0] == T_ELLIPSIS) {
// Variadic function.
$splat = true;
}
}
// PHP 8 treats namespaces as single token. So we are going to undo this here
// and continue returning only the final part of the namespace. Someday we'll
// move to use full namespaces here, but not for now (we are doing the same,
// in other parts of the code, when processing phpdoc blocks).
if (strpos((string)$type, '\\') !== false) {
// Namespaced typehint, potentially sub-namespaced.
// We need to strip namespacing as this area just isn't that smart.
$type = substr($type, strrpos($type, '\\') + 1);
}
$function->arguments[] = array($type, $variable);
}
$function->boundaries = $this->find_object_boundaries($function);
$this->functions[] = $function;
}
}
}
return $this->functions;
}
/**
* Returns all class properties (variables) found in file
*
* Returns array of objects where each element represents a variable:
* $variable->tid : token id of the token with variable name
* $variable->name : name of the variable (starts with $)
* $variable->phpdocs : phpdocs for this variable (instance of local_moodlecheck_phpdocs or false if not found)
* $variable->class : containing class object
* $variable->fullname : name of the variable with class name (i.e. classname::$varname)
* $variable->accessmodifiers : tokens like static, public, protected, abstract, etc.
* $variable->boundaries : array with ids of first and last token for this variable
*
* @return array
*/
public function &get_variables() {
if ($this->variables === null) {
$this->variables = array();
$this->get_tokens();
for ($tid = 0; $tid < $this->tokenscount; $tid++) {
if ($this->tokens[$tid][0] == T_VARIABLE && ($class = $this->is_inside_class($tid)) &&
!$this->is_inside_function($tid)) {
$variable = new stdClass;
$variable->tid = $tid;
$variable->name = $this->tokens[$tid][1];
$variable->class = $class;
$variable->fullname = $class->name . '::' . $variable->name;
$beforetype = $this->skip_preceding_type($tid);
$variable->accessmodifiers = $this->find_access_modifiers($beforetype);
$variable->phpdocs = $this->find_preceeding_phpdoc($beforetype);
$variable->boundaries = $this->find_object_boundaries($variable);
$this->variables[] = $variable;
}
}
}
return $this->variables;
}
/**
* Returns all constants found in file
*
* Returns array of objects where each element represents a constant:
* $variable->tid : token id of the token with variable name
* $variable->name : name of the variable (starts with $)
* $variable->phpdocs : phpdocs for this variable (instance of local_moodlecheck_phpdocs or false if not found)
* $variable->class : containing class object
* $variable->fullname : name of the variable with class name (i.e. classname::$varname)
* $variable->boundaries : array with ids of first and last token for this constant
*
* @return array
*/
public function &get_constants() {
if ($this->constants === null) {
$this->constants = array();
$this->get_tokens();
for ($tid = 0; $tid < $this->tokenscount; $tid++) {
if ($this->tokens[$tid][0] == T_USE) {
// Skip the entire use statement, to avoid interpreting "use const" as a constant.
$tid = $this->end_of_statement($tid);
continue;
}
if ($this->tokens[$tid][0] == T_CONST && !$this->is_inside_function($tid)) {
$variable = new stdClass;
$variable->tid = $tid;
$variable->fullname = $variable->name = $this->next_nonspace_token($tid, false);
$variable->class = $this->is_inside_class($tid);
if ($variable->class !== false) {
$variable->fullname = $variable->class->name . '::' . $variable->name;
}
$variable->phpdocs = $this->find_preceeding_phpdoc($tid);
$variable->boundaries = $this->find_object_boundaries($variable);
$this->constants[] = $variable;
}
}
}
return $this->constants;
}
/**
* Returns all 'define' statements found in file
*
* Returns array of objects where each element represents a define statement:
* $variable->tid : token id of the token with variable name
* $variable->name : name of the variable (starts with $)
* $variable->phpdocs : phpdocs for this variable (instance of local_moodlecheck_phpdocs or false if not found)
* $variable->class : containing class object
* $variable->fullname : name of the variable with class name (i.e. classname::$varname)
* $variable->boundaries : array with ids of first and last token for this constant
*
* @return array
*/
public function &get_defines() {
if ($this->defines === null) {
$this->defines = array();
$this->get_tokens();
for ($tid = 0; $tid < $this->tokenscount; $tid++) {
if ($this->tokens[$tid][0] == T_STRING && $this->tokens[$tid][1] == 'define' &&
!$this->is_inside_function($tid) && !$this->is_inside_class($tid)) {
$next1id = $this->next_nonspace_token($tid, true);
$next1 = $this->next_nonspace_token($tid, false);
$next2 = $this->next_nonspace_token($next1id, false);
$variable = new stdClass;
$variable->tid = $tid;
if ($next1 == '(' && preg_match("/^(['\"])(.*)\\1$/", $next2, $matches)) {
$variable->fullname = $variable->name = $matches[2];
}
$variable->phpdocs = $this->find_preceeding_phpdoc($tid);
$variable->boundaries = $this->find_object_boundaries($variable);
$defines[] = $variable;
}
}
}
return $this->defines;
}
/**
* Finds and returns object boundaries
*
* $obj is an object representing function, class or variable. This function
* returns token ids for the very first token applicable to this object
* to the very last
*
* @param stdClass $obj
* @return array
*/
public function find_object_boundaries($obj) {
$boundaries = array($obj->tid, $obj->tid);
$tokens = &$this->get_tokens();
if (!empty($obj->tagpair)) {
$boundaries[1] = $obj->tagpair[1];
} else {
// Find the next ; char.
for ($i = $boundaries[1]; $i < $this->tokenscount; $i++) {
if ($tokens[$i][1] == ';') {
$boundaries[1] = $i;
break;
}
}
}
if (isset($obj->phpdocs) && $obj->phpdocs instanceof local_moodlecheck_phpdocs) {
$boundaries[0] = $obj->phpdocs->get_original_token_id();
} else {
// Walk back until we meet one of the characters that means that we are outside of the object.
for ($i = $boundaries[0] - 1; $i >= 0; $i--) {
$token = $tokens[$i];
if (in_array($token[0], array(T_OPEN_TAG, T_OPEN_TAG_WITH_ECHO, T_CLOSE_TAG))) {
break;
} else if (in_array($token[1], array('{', '}', '(', ';', ',', '['))) {
break;
}
}
// Walk forward to the next meaningful token skipping all spaces and comments.
for ($i = $i + 1; $i < $boundaries[0]; $i++) {
if (!in_array($tokens[$i][0], array(T_WHITESPACE, T_COMMENT, T_DOC_COMMENT))) {
break;
}
}
$boundaries[0] = $i;
}
return $boundaries;
}
/**
* Checks if the token with id $tid in inside some class
*
* @param int $tid
* @return stdClass|false containing class or false if this is not a member
*/
public function is_inside_class($tid) {
$classes = &$this->get_classes();
$classescnt = count($classes);
for ($clid = 0; $clid < $classescnt; $clid++) {
if ($classes[$clid]->boundaries[0] <= $tid && $classes[$clid]->boundaries[1] >= $tid) {
return $classes[$clid];
}
}
return false;
}
/**
* Checks if the token with id $tid in inside some artifact (class, interface, or trait).
*
* @param int $tid
* @return stdClass|false containing artifact or false if this is not a member
*/
public function is_inside_artifact(int $tid) {
$artifacts = $this->get_artifacts_flat();
foreach ($artifacts as $artifact) {
if ($artifact->boundaries[0] <= $tid && $artifact->boundaries[1] >= $tid) {
return $artifact;
}
}
return false;
}
/**
* Checks if the token with id $tid in inside some function or class method
*
* @param int $tid
* @return stdClass|false containing function or false if this is not inside a function
*/
public function is_inside_function($tid) {
$functions = &$this->get_functions();
$functionscnt = count($functions);
for ($fid = 0; $fid < $functionscnt; $fid++) {
if ($functions[$fid]->boundaries[0] <= $tid && $functions[$fid]->boundaries[1] >= $tid) {
return $functions[$fid];
}
}
return false;
}
/**
* Checks if token with id $tid is a whitespace
*
* @param int $tid
* @return boolean
*/
public function is_whitespace_token($tid) {
$this->get_tokens();
return (isset($this->tokens[$tid][0]) && $this->tokens[$tid][0] == T_WHITESPACE);
}
/**
* Returns how many line feeds are in this token
*
* @param int $tid
* @return int
*/
public function is_multiline_token($tid) {
$this->get_tokens();
return substr_count($this->tokens[$tid][1], "\n");
}
/**
* Returns the first token which is not whitespace following the token with id $tid
*
* Also returns false if no meaningful token found till the end of file
*
* @param int $tid
* @param bool $returnid
* @param array $alsoignore
* @return int|false
*/
public function next_nonspace_token($tid, $returnid = false, $alsoignore = array()) {
$this->get_tokens();
for ($i = $tid + 1; $i < $this->tokenscount; $i++) {
if (!$this->is_whitespace_token($i) && !in_array($this->tokens[$i][1], $alsoignore)) {
if ($returnid) {
return $i;
} else {
return $this->tokens[$i][1];
}
}
}
return false;
}
/**
* Returns the first token which is not whitespace before the token with id $tid
*
* Also returns false if no meaningful token found till the beginning of file
*
* @param int $tid
* @param bool $returnid
* @param array $alsoignore
* @return int|false
*/
public function previous_nonspace_token($tid, $returnid = false, $alsoignore = array()) {
$this->get_tokens();
for ($i = $tid - 1; $i > 0; $i--) {
if (!$this->is_whitespace_token($i) && !in_array($this->tokens[$i][1], $alsoignore)) {
if ($returnid) {
return $i;
} else {
return $this->tokens[$i][1];
}
}
}
return false;
}
/**
* Returns the next semicolon or close tag following $tid, or the last token of the file, whichever comes first.
*
* @param int $tid starting token
* @return int index of the next semicolon or close tag following $tid, or the last token of the file, whichever
* comes first
*/
public function end_of_statement($tid) {
for (; $tid < $this->tokenscount; $tid++) {
if ($this->tokens[$tid][1] == ";" || $this->tokens[$tid][0] == T_CLOSE_TAG) {
// Semicolons and close tags (?>) end statements.
return $tid;
}
}
// EOF also ends statements.
return $tid;
}
/**
* Returns all modifiers (private, public, static, ...) preceeding token with id $tid
*
* @param int $tid
* @return array
*/
public function find_access_modifiers($tid) {
$tokens = &$this->get_tokens();
$modifiers = array();
for ($i = $tid - 1; $i >= 0; $i--) {
if ($this->is_whitespace_token($i)) {
// Skip.
continue;
} else if (in_array($tokens[$i][0], self::MODIFIERS)) {
$modifiers[] = $tokens[$i][0];
} else {
break;
}
}
return $modifiers;
}
/**
* Finds phpdocs preceeding the token with id $tid
*
* skips words abstract, private, public, protected and non-multiline whitespaces
*
* @param int $tid
* @return local_moodlecheck_phpdocs|false
*/
public function find_preceeding_phpdoc($tid) {
$tokens = &$this->get_tokens();
$modifiers = $this->find_access_modifiers($tid);
for ($i = $tid - 1; $i >= 0; $i--) {
if ($this->is_whitespace_token($i)) {
if ($this->is_multiline_token($i) > 1) {
// More that one line feed means that no phpdocs for this element exists.
return false;
}
} else if ($tokens[$i][0] == T_DOC_COMMENT) {
return $this->get_phpdocs($i);
} else if (in_array($tokens[$i][0], $modifiers)) {
// Just skip.
continue;
} else if (in_array($tokens[$i][1], array('{', '}', ';'))) {
// This means that no phpdocs exists.
return false;
} else if ($tokens[$i][0] == T_COMMENT) {
// This probably needed to be doc_comment.
return false;
} else {
// No idea what it is!
// TODO: change to debugging
// echo "************ Unknown preceeding token id = {$tokens[$i][0]}, text = '{$tokens[$i][1]}' **************<br>".
return false;
}
}
return false;
}
/**
* Skips any tokens that _could be_ part of a type of a typed property definition.
*
* @param int $tid the token before which a type is expected
* @return int the token id (`< $tid`) directly before the first token of the type. If there is no type, this will
* be the token directly preceding `$tid`.
*/
private function skip_preceding_type(int $tid): int {
for ($i = $tid - 1; $i >= 0; $i--) {
if ($this->is_whitespace_token($i)) {
continue;
}
$token = $this->tokens[$i];
if (in_array($token[0], self::MODIFIERS)) {
// This looks like the last modifier. Return the token after it.
return $i + 1;
} else if (in_array($token[1], ['{', '}', ';'])) {
// We've gone past the beginning of the statement. This isn't possible in valid PHP, but still...
// Return the first token of the statement we were in.
return $i + 1;
}
// This is something else. Let's assume it to be part of the property's type and skip it.
}
// We've gone all the way to the start of the file, which shouldn't be possible in valid PHP.
return 0;
}
/**
* Finds the next pair of matching open and close symbols (usually some sort of brackets)
*
* @param int $startid id of token where we start looking from
* @param string $opensymbol opening symbol (, { or [
* @param string $closesymbol closing symbol ), } or ] respectively
* @param array $breakifmeet array of symbols that are not allowed not preceed the $opensymbol
* @return array|false array of ids of two corresponding tokens or false if not found
*/
public function find_tag_pair($startid, $opensymbol, $closesymbol, $breakifmeet = array()) {
$openid = false;
$counter = 0;
// Also break if we find closesymbol before opensymbol.
$breakifmeet[] = $closesymbol;
for ($i = $startid; $i < $this->tokenscount; $i++) {
if ($openid === false && in_array($this->tokens[$i][1], $breakifmeet)) {
return false;
} else if ($openid !== false && $this->tokens[$i][1] == $closesymbol) {
$counter--;
if ($counter == 0) {
return array($openid, $i);
}
} else if ($this->tokens[$i][1] == $opensymbol) {
if ($openid === false) {
$openid = $i;
}
$counter++;
}
}
return false;
}
/**
* Finds the next pair of matching open and close symbols (usually some sort of brackets)
*
* @param array $tokens array of tokens to parse
* @param int $startid id of token where we start looking from
* @param string $opensymbol opening symbol (, { or [
* @param string $closesymbol closing symbol ), } or ] respectively
* @param array $breakifmeet array of symbols that are not allowed not preceed the $opensymbol
* @return array|false array of ids of two corresponding tokens or false if not found
*/
public function find_tag_pair_inlist(&$tokens, $startid, $opensymbol, $closesymbol, $breakifmeet = array()) {
$openid = false;
$counter = 0;
// Also break if we find closesymbol before opensymbol.
$breakifmeet[] = $closesymbol;
$tokenscount = count($tokens);
for ($i = $startid; $i < $tokenscount; $i++) {
if ($openid === false && in_array($tokens[$i][1], $breakifmeet)) {
return false;
} else if ($openid !== false && $tokens[$i][1] == $closesymbol) {
$counter--;
if ($counter == 0) {
return array($openid, $i);
}
} else if ($tokens[$i][1] == $opensymbol) {
if ($openid === false) {
$openid = $i;
}
$counter++;
}
}
return false;
}
/**
* Locates the file-level phpdocs and returns it
*
* @return string|false either the contents of phpdocs or false if not found
*/
public function find_file_phpdocs() {
$tokens = &$this->get_tokens();
if ($this->filephpdocs === null) {
$found = false;
for ($tid = 0; $tid < $this->tokenscount; $tid++) {
if (in_array($tokens[$tid][0], array(T_OPEN_TAG, T_WHITESPACE, T_COMMENT))) {
// All allowed before the file-level phpdocs.
$found = false;
} else if ($tokens[$tid][0] == T_DOC_COMMENT) {
$found = $tid;
break;
} else {
// Found something else.
break;
}
}
if ($found !== false) {
// Now let's check that this is not phpdocs to the next function or class or define.
$nexttokenid = $this->next_nonspace_token($tid, true);
if ($nexttokenid !== false) { // Still tokens to look.
$nexttoken = $this->tokens[$nexttokenid];
if ($this->is_whitespace_token($tid + 1) && $this->is_multiline_token($tid + 1) > 1) {
// At least one empty line follows, it's all right.
$found = $tid;
} else if (in_array($nexttoken[0],
array(T_DOC_COMMENT, T_COMMENT, T_REQUIRE_ONCE, T_REQUIRE, T_IF, T_INCLUDE_ONCE, T_INCLUDE))) {
// Something non-documentable following, ok.
$found = $tid;
} else if ($nexttoken[0] == T_STRING && $nexttoken[1] == 'defined') {
// Something non-documentable following.
$found = $tid;
} else if (in_array($nexttoken[0], array(T_CLASS, T_ABSTRACT, T_INTERFACE, T_FUNCTION))) {
// This is the doc comment to the following class/function.
$found = false;
}
// TODO: change to debugging.
// } else {
// echo "************ "
// echo "Unknown token following the first phpdocs in "
// echo "{$this->filepath}: id = {$nexttoken[0]}, text = '{$nexttoken[1]}'"
// echo " **************<br>"
// }.
}
}
$this->filephpdocs = $this->get_phpdocs($found);
}
return $this->filephpdocs;
}
/**
* Returns all parsed phpdocs block found in file
*
* @return array
*/
public function &get_all_phpdocs() {
if ($this->allphpdocs === null) {
$this->allphpdocs = array();
$this->get_tokens();
for ($id = 0; $id < $this->tokenscount; $id++) {
if (($this->tokens[$id][0] == T_DOC_COMMENT || $this->tokens[$id][0] === T_COMMENT)) {
$this->allphpdocs[$id] = new local_moodlecheck_phpdocs($this->tokens[$id], $id);
}
}
}
return $this->allphpdocs;
}
/**
* Returns one parsed phpdocs block found in file
*
* @param int $tid token id of phpdocs
* @return local_moodlecheck_phpdocs
*/
public function get_phpdocs($tid) {
if ($tid === false) {
return false;
}
$this->get_all_phpdocs();
if (isset($this->allphpdocs[$tid])) {
return $this->allphpdocs[$tid];
} else {
return false;
}
}
/**
* Given an array of tokens breaks them into chunks by $separator
*
* @param array $tokens
* @param string $separator one-character separator (usually comma)
* @return array of arrays of tokens
*/
public function break_tokens_by($tokens, $separator = ',') {
$rv = array();
if (!count($tokens)) {
return $rv;
}
$rv[] = array();
for ($i = 0; $i < count($tokens); $i++) {
if ($tokens[$i][1] == $separator) {
$rv[] = array();
} else {
$nextpair = false;
if ($tokens[$i][1] == '(') {
$nextpair = $this->find_tag_pair_inlist($tokens, $i, '(', ')');
} else if ($tokens[$i][1] == '[') {
$nextpair = $this->find_tag_pair_inlist($tokens, $i, '[', ']');
} else if ($tokens[$i][1] == '{') {
$nextpair = $this->find_tag_pair_inlist($tokens, $i, '{', '}');
}