IndexSqlite::search() - Code Metrics - Inspection of "ext: guard Array.Prototype and MixedCollections fr..." - grommunio/grommunio-web - Measure and Improve Code Quality continuously with Scrutinizer

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created 2025-09-30 17:03 UTC

IndexSqlite::search() D

↳ Parent: IndexSqlite

Complexity

Conditions	17
Paths	42

Size

Total Lines	121
Code Lines	96

Duplication

Lines	0
Ratio	0 %

Importance

Changes	6
Bugs	1	Features	0

Metric	Value
cc	17
eloc	96
nc	42
nop	4
dl	0
loc	121
rs	4.2606
c	6
b	1
f	0

How to fix Long Method Complexity

<?php

define('PRIVATE_FID_ROOT', 0x1);

define('PR_FOLDER_ID', 0x67480014);
define('PR_MID', 0x674A0014);
define('PR_CHANGE_NUMBER', 0x67A40014);

class IndexSqlite extends SQLite3 {
	private $username;
	private $count;
	private $store;
	private $session;
	private $openResult;

	private const DEBUG_SAMPLE_LIMIT = 5;

	private function logDebug(string $message, array $context = []): void {
		if (!DEBUG_FULLTEXT_SEARCH) {
			return;
		}
		$prefix = '[fts-debug][index] ';
		if (!empty($context)) {
			$encoded = json_encode($context, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
			if ($encoded === false) {
				$encoded = 'context_encoding_failed';
			}
			error_log($prefix . $message . ' ' . $encoded);
		}
		else {
			error_log($prefix . $message);
		}
	}

	private static function formatEntryIdForLog($entryid) {
		if ($entryid === null) {
			return null;
		}
		if (is_array($entryid)) {
			return array_map([self::class, 'formatEntryIdForLog'], $entryid);
		}
		if (!is_string($entryid)) {
			return $entryid;
		}

		return bin2hex($entryid);
	}

	private static function formatBinaryFieldForLog($value) {
		if ($value === null) {
			return null;
		}
		if (!is_string($value)) {
			return $value;
		}
		if (preg_match('/[^\x20-\x7E]/', $value)) {
			return bin2hex($value);
		}

		return $value;
	}

	private static function get_gc_value($eid) {
		$r0 = ($eid >> 56) & 0xFF;
		$r1 = ($eid >> 48) & 0xFF;
		$r2 = ($eid >> 40) & 0xFF;
		$r3 = ($eid >> 32) & 0xFF;
		$r4 = ($eid >> 24) & 0xFF;
		$r5 = ($eid >> 16) & 0xFF;
		$value = $r0 | ($r1 << 8) | ($r2 << 16) | ($r3 << 24) | ($r4 << 32) | ($r5 << 40);

		return $value;
	}

	public function __construct($username = null, $session = null, $store = null) {
		$this->username = $username ?? $GLOBALS["mapisession"]->getSMTPAddress();
		$this->session = $session ?? $GLOBALS["mapisession"]->getSession();
		$this->store = $store ?? $GLOBALS["mapisession"]->getDefaultMessageStore();
		$indexPath = SQLITE_INDEX_PATH . '/' . $this->username . '/index.sqlite3';

		try {
			$this->open($indexPath, SQLITE3_OPEN_READONLY);
			$this->openResult = 0;
			$this->logDebug('Opened index database', ['path' => $indexPath]);
		}
		catch (Exception $e) {
			error_log(sprintf("Error opening the index database: %s", $e));
			$this->openResult = 1;
			$this->logDebug('Failed to open index database', [
				'path' => $indexPath,
				'error' => $e->getMessage(),
			]);
		}
	}

	private function try_insert_content(
		$search_entryid,
		$row,
		$message_classes,
		$date_start,
		$date_end,
		$unread,
		$has_attachments
	) {
		// if match condition contains '@', $row['entryid'] will disappear. it seems a bug for php-sqlite
		if (empty($row['entryid'])) {
			$results = $this->query("SELECT entryid FROM msg_content WHERE message_id=" . $row['message_id']);
			$row1 = $results->fetchArray(SQLITE3_NUM);
			if ($row1 && !empty($row1[0])) {

				$row['entryid'] = $row1[0];
				$this->logDebug('Recovered missing entryid from msg_content', [
					'message_id' => $row['message_id'],
				]);
			}
			// abort if the entryid is not available
			else {
				error_log(sprintf("No entryid available, not possible to link the message %d.", $row['message_id']));
				$this->logDebug('Missing entryid prevents linking message', [
					'message_id' => $row['message_id'],
				]);

				return;
			}
		}
		if (is_array($message_classes) && $message_classes !== []) {
			$found = false;
			foreach ($message_classes as $message_class) {
				if (strncasecmp((string) $row['message_class'], (string) $message_class, strlen((string) $message_class)) == 0) {
					$found = true;
					break;
				}
			}
			if (!$found) {
				$this->logDebug('Skipping message because message class is filtered out', [
					'message_id' => $row['message_id'] ?? null,
					'message_class' => $row['message_class'] ?? null,
				]);
				return;
			}
		}
		if ($date_start !== null && $row['date'] < $date_start) {
			$this->logDebug('Skipping message before start date filter', [
				'message_id' => $row['message_id'] ?? null,
				'message_date' => $row['date'] ?? null,
				'date_start' => $date_start,
			]);
			return;
		}
		if ($date_end !== null && $row['date'] > $date_end) {
			$this->logDebug('Skipping message after end date filter', [
				'message_id' => $row['message_id'] ?? null,
				'message_date' => $row['date'] ?? null,
				'date_end' => $date_end,
			]);
			return;
		}
		if ($unread && $row['readflag']) {
			$this->logDebug('Skipping message because unread flag filter is active', [
				'message_id' => $row['message_id'] ?? null,
				'readflag' => $row['readflag'] ?? null,
			]);
			return;
		}
		if ($has_attachments && !$row['attach_indexed']) {
			$this->logDebug('Skipping message because attachment filter is active', [
				'message_id' => $row['message_id'] ?? null,
				'attach_indexed' => $row['attach_indexed'] ?? null,
			]);
			return;
		}

		try {
			mapi_linkmessage($this->session, $search_entryid, $row['entryid']);
		}
		catch (Exception $e) {
			$details = [
				'message_id' => $row['message_id'],
				'entryid' => self::formatBinaryFieldForLog($row['entryid']),
				'error' => $e->getMessage(),
			];
			if (function_exists('mapi_last_hresult')) {
				$details['hresult'] = mapi_last_hresult();
			}
			$this->logDebug('MAPI linkmessage failed', $details);
			return;
		}
		++$this->count;
	}

	private function result_full() {
		return $this->count >= MAX_FTS_RESULT_ITEMS;
	}

	public function search($search_entryid, $descriptor, $folder_entryid, $recursive) {
		$startTime = microtime(true);
		$this->logDebug('Search invoked', [
			'user' => $this->username,
			'search_entryid' => self::formatEntryIdForLog($search_entryid),
			'folder_entryid' => self::formatEntryIdForLog($folder_entryid),
			'recursive' => (bool) $recursive,
			'descriptor' => $descriptor,
		]);
		if ($this->openResult) {
			$this->logDebug('Search aborted: index database unavailable', ['open_result' => $this->openResult]);
			return false;
		}
		$whereFolderids = '';
		if (isset($folder_entryid)) {
			try {
				$folder = mapi_msgstore_openentry($this->store, $folder_entryid);
				if (!$folder) {
					return false;
				}
				$tmp_props = mapi_getprops($folder, [PR_FOLDER_ID]);
				if (empty($tmp_props[PR_FOLDER_ID])) {
					return false;
				}
				$folder_id = IndexSqlite::get_gc_value((int) $tmp_props[PR_FOLDER_ID]);
				$whereFolderids .= "c.folder_id in (" . $folder_id . ", ";
				if ($recursive) {
					$this->getWhereFolderids($folder, $whereFolderids);
				}
				$whereFolderids = substr($whereFolderids, 0, -2) . ") AND ";
				$this->logDebug('Folder scope resolved', [
					'root_folder_gc_id' => $folder_id,
					'folder_clause' => rtrim($whereFolderids),
				]);
			}
			catch (Exception $e) {
				error_log(sprintf("Index: error getting folder information %s - %s", $this->username, $e));
				$this->logDebug('Failed to resolve folder scope', ['error' => $e->getMessage()]);

				return false;
			}
		}
		$sql_string = "SELECT c.message_id, c.entryid, c.folder_id, " .
			"c.message_class, c.date, c.readflag, c.attach_indexed " .
			"FROM msg_content c " .
			"JOIN messages m ON c.message_id = m.rowid " .
			"WHERE ";
		if (!empty($whereFolderids)) {
			$sql_string .= $whereFolderids;
		}
		$ftsAst = $descriptor['ast'] ?? null;
		$message_classes = $descriptor['message_classes'] ?? null;
		$date_start = $descriptor['date_start'] ?? null;
		$date_end = $descriptor['date_end'] ?? null;
		$unread = !empty($descriptor['unread']);
		$has_attachments = !empty($descriptor['has_attachments']);
		$this->logDebug('Search filters resolved', [
			'unread' => $unread,
			'has_attachments' => $has_attachments,
			'date_start' => $date_start,
			'date_end' => $date_end,
			'message_classes_count' => is_array($message_classes) ? count($message_classes) : null,
		]);

		$ftsQuery = $this->compileFtsExpression($ftsAst);
		if ($ftsQuery === null || $ftsQuery === '') {
			$this->logDebug('FTS query compilation returned empty expression', [
				'ast' => $ftsAst,
			]);
			return false;
		}

		$sql_string .= "messages MATCH '" . $ftsQuery . "'";
		$this->count = 0;
		$sql_string .= " ORDER BY c.date DESC LIMIT " . MAX_FTS_RESULT_ITEMS;
		$this->logDebug('Executing SQLite FTS query', ['sql' => $sql_string]);
		$results = $this->query($sql_string);
		if ($results === false) {
			$this->logDebug('SQLite query execution failed', [
				'error_code' => $this->lastErrorCode(),
				'error_message' => $this->lastErrorMsg(),
			]);
			return false;
		}
		$matchedRows = 0;
		$sampleRows = [];
		while (($row = $results->fetchArray(SQLITE3_ASSOC)) && !$this->result_full()) {
			++$matchedRows;
			$previousCount = $this->count;
			$this->try_insert_content(
				$search_entryid,
				$row,
				$message_classes,
				$date_start,
				$date_end,
				$unread,
				$has_attachments
			);
			if ($this->count > $previousCount && count($sampleRows) < self::DEBUG_SAMPLE_LIMIT) {
				$sampleRows[] = [
					'message_id' => $row['message_id'] ?? null,
					'entryid' => self::formatBinaryFieldForLog($row['entryid'] ?? null),
					'message_class' => $row['message_class'] ?? null,
					'date' => $row['date'] ?? null,
					'readflag' => $row['readflag'] ?? null,
					'attach_indexed' => $row['attach_indexed'] ?? null,
				];
			}
		}
		$durationMs = (int) round((microtime(true) - $startTime) * 1000);
		$this->logDebug('Search completed', [
			'fts_query' => $ftsQuery,
			'matched_rows' => $matchedRows,
			'linked_messages' => $this->count,
			'limit_reached' => $this->result_full(),
			'folder_clause' => $whereFolderids !== '' ? rtrim($whereFolderids) : null,
			'sample_messages' => $sampleRows,
			'duration_ms' => $durationMs,
		]);

		return true;
	}

	private function compileFtsExpression($ast) {
		if ($ast === null) {
			return null;
		}

		if (isset($ast['type']) && $ast['type'] === 'term') {
			$fields = $ast['fields'] ?? [];
			if (empty($fields)) {
				return null;
			}
			$escaped = SQLite3::escapeString($this->quote_words($ast['value'] ?? ''));
			$segments = [];
			foreach ($fields as $field) {
				$segments[] = $field . ':' . $escaped;
			}
			if (count($segments) === 1) {
				return $segments[0];
			}
			return '(' . implode(' OR ', $segments) . ')';
		}

		$operator = $ast['op'] ?? null;
		$children = $ast['children'] ?? [];
		if ($operator === 'NOT') {
			$child = $this->compileFtsExpression($children[0] ?? null);
			if ($child === null) {
				return null;
			}
			return 'NOT (' . $child . ')';
		}
		if ($operator === 'AND' || $operator === 'OR') {
			$parts = [];
			foreach ($children as $child) {
				$compiled = $this->compileFtsExpression($child);
				if ($compiled !== null) {
					$parts[] = $compiled;
				}
			}
			if (empty($parts)) {
				return null;
			}
			if (count($parts) === 1) {
				return $parts[0];
			}
			$wrapped = array_map(function ($segment) {
				return '(' . $segment . ')';
			}, $parts);
			return implode(' ' . $operator . ' ', $wrapped);
		}

		return null;
	}

	private function quote_words($search_string) {
		return '"' . preg_replace("/(\\s+)/", '*" "', trim((string) $search_string)) . '"*';
	}

	/**
	 * Returns the restriction to filter hidden folders.
	 *
	 * @return array
	 */
	private function getHiddenRestriction() {
		return
			[RES_OR, [
				[RES_PROPERTY,
					[
						RELOP => RELOP_EQ,
						ULPROPTAG => PR_ATTR_HIDDEN,
						VALUE => [PR_ATTR_HIDDEN => false],
					],
				],
				[RES_NOT,
					[
						[RES_EXIST,
							[
								ULPROPTAG => PR_ATTR_HIDDEN,
							],
						],
					],
				],
			]];
	}

	/**
	 * Returns the comma joined folderids for the WHERE clause in the SQL
	 * statement.
	 *
	 * @param mixed  $folder
	 * @param string $whereFolderids
	 */
	private function getWhereFolderids($folder, &$whereFolderids) {
		/**
		 * remove hidden folders, folders with PR_ATTR_HIDDEN property set
		 * should not be shown to the client.
		 */
		$restriction = $this->getHiddenRestriction();
		$hierarchy = mapi_folder_gethierarchytable($folder, CONVENIENT_DEPTH | MAPI_DEFERRED_ERRORS);
		mapi_table_restrict($hierarchy, $restriction, TBL_BATCH);
		$rows = mapi_table_queryallrows($hierarchy, [PR_FOLDER_ID]);
		foreach ($rows as $row) {
			if (isset($row[PR_FOLDER_ID])) {
				$whereFolderids .= IndexSqlite::get_gc_value((int) $row[PR_FOLDER_ID]) . ", ";
			}
		}
	}
}


1			<?php
2
3			define('PRIVATE_FID_ROOT', 0x1);
4
5			define('PR_FOLDER_ID', 0x67480014);
6			define('PR_MID', 0x674A0014);
7			define('PR_CHANGE_NUMBER', 0x67A40014);
8
9			class IndexSqlite extends SQLite3 {
10			private $username;
11			private $count;
12			private $store;
13			private $session;
14			private $openResult;
15
16			private const DEBUG_SAMPLE_LIMIT = 5;
17
18			private function logDebug(string $message, array $context = []): void {
19			if (!DEBUG_FULLTEXT_SEARCH) {
20			return;
21			}
22			$prefix = '[fts-debug][index] ';
23			if (!empty($context)) {
24			$encoded = json_encode($context, JSON_UNESCAPED_SLASHES \| JSON_UNESCAPED_UNICODE);
25			if ($encoded === false) {
26			$encoded = 'context_encoding_failed';
27			}
28			error_log($prefix . $message . ' ' . $encoded);
29			}
30			else {
31			error_log($prefix . $message);
32			}
33			}
34
35			private static function formatEntryIdForLog($entryid) {
36			if ($entryid === null) {
37			return null;
38			}
39			if (is_array($entryid)) {
40			return array_map([self::class, 'formatEntryIdForLog'], $entryid);
41			}
42			if (!is_string($entryid)) {
43			return $entryid;
44			}
45
46			return bin2hex($entryid);
47			}
48
49			private static function formatBinaryFieldForLog($value) {
50			if ($value === null) {
51			return null;
52			}
53			if (!is_string($value)) {
54			return $value;
55			}
56			if (preg_match('/[^\x20-\x7E]/', $value)) {
57			return bin2hex($value);
58			}
59
60			return $value;
61			}
62
63			private static function get_gc_value($eid) {
64			$r0 = ($eid >> 56) & 0xFF;
65			$r1 = ($eid >> 48) & 0xFF;
66			$r2 = ($eid >> 40) & 0xFF;
67			$r3 = ($eid >> 32) & 0xFF;
68			$r4 = ($eid >> 24) & 0xFF;
69			$r5 = ($eid >> 16) & 0xFF;
70			$value = $r0 \| ($r1 << 8) \| ($r2 << 16) \| ($r3 << 24) \| ($r4 << 32) \| ($r5 << 40);
71
72			return $value;
73			}
74
75			public function __construct($username = null, $session = null, $store = null) {
76			$this->username = $username ?? $GLOBALS["mapisession"]->getSMTPAddress();
77			$this->session = $session ?? $GLOBALS["mapisession"]->getSession();
78			$this->store = $store ?? $GLOBALS["mapisession"]->getDefaultMessageStore();
79			$indexPath = SQLITE_INDEX_PATH . '/' . $this->username . '/index.sqlite3';
80
81			try {
82			$this->open($indexPath, SQLITE3_OPEN_READONLY);
83			$this->openResult = 0;
84			$this->logDebug('Opened index database', ['path' => $indexPath]);
85			}
86			catch (Exception $e) {
87			error_log(sprintf("Error opening the index database: %s", $e));
88			$this->openResult = 1;
89			$this->logDebug('Failed to open index database', [
90			'path' => $indexPath,
91			'error' => $e->getMessage(),
92			]);
93			}
94			}
95
96			private function try_insert_content(
97			$search_entryid,
98			$row,
99			$message_classes,
100			$date_start,
101			$date_end,
102			$unread,
103			$has_attachments
104			) {
105			// if match condition contains '@', $row['entryid'] will disappear. it seems a bug for php-sqlite
106			if (empty($row['entryid'])) {
107			$results = $this->query("SELECT entryid FROM msg_content WHERE message_id=" . $row['message_id']);
108			$row1 = $results->fetchArray(SQLITE3_NUM);
109			if ($row1 && !empty($row1[0])) {
			0 ignored issues – show Bug Best Practice introduced 2022-05-28 00:11 UTC by Report Bug Copy Issue Report The expression `$row1` of type `array` is implicitly converted to a boolean; are you sure this is intended? If so, consider using `! empty($expr)` instead to make it clear that you intend to check for an array without elements. This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent. Consider making the comparison explicit by using `empty(..)` or `! empty(...)` instead. Loading history...
110			$row['entryid'] = $row1[0];
111			$this->logDebug('Recovered missing entryid from msg_content', [
112			'message_id' => $row['message_id'],
113			]);
114			}
115			// abort if the entryid is not available
116			else {
117			error_log(sprintf("No entryid available, not possible to link the message %d.", $row['message_id']));
118			$this->logDebug('Missing entryid prevents linking message', [
119			'message_id' => $row['message_id'],
120			]);
121
122			return;
123			}
124			}
125			if (is_array($message_classes) && $message_classes !== []) {
126			$found = false;
127			foreach ($message_classes as $message_class) {
128			if (strncasecmp((string) $row['message_class'], (string) $message_class, strlen((string) $message_class)) == 0) {
129			$found = true;
130			break;
131			}
132			}
133			if (!$found) {
134			$this->logDebug('Skipping message because message class is filtered out', [
135			'message_id' => $row['message_id'] ?? null,
136			'message_class' => $row['message_class'] ?? null,
137			]);
138			return;
139			}
140			}
141			if ($date_start !== null && $row['date'] < $date_start) {
142			$this->logDebug('Skipping message before start date filter', [
143			'message_id' => $row['message_id'] ?? null,
144			'message_date' => $row['date'] ?? null,
145			'date_start' => $date_start,
146			]);
147			return;
148			}
149			if ($date_end !== null && $row['date'] > $date_end) {
150			$this->logDebug('Skipping message after end date filter', [
151			'message_id' => $row['message_id'] ?? null,
152			'message_date' => $row['date'] ?? null,
153			'date_end' => $date_end,
154			]);
155			return;
156			}
157			if ($unread && $row['readflag']) {
158			$this->logDebug('Skipping message because unread flag filter is active', [
159			'message_id' => $row['message_id'] ?? null,
160			'readflag' => $row['readflag'] ?? null,
161			]);
162			return;
163			}
164			if ($has_attachments && !$row['attach_indexed']) {
165			$this->logDebug('Skipping message because attachment filter is active', [
166			'message_id' => $row['message_id'] ?? null,
167			'attach_indexed' => $row['attach_indexed'] ?? null,
168			]);
169			return;
170			}
171
172			try {
173			mapi_linkmessage($this->session, $search_entryid, $row['entryid']);
174			}
175			catch (Exception $e) {
176			$details = [
177			'message_id' => $row['message_id'],
178			'entryid' => self::formatBinaryFieldForLog($row['entryid']),
179			'error' => $e->getMessage(),
180			];
181			if (function_exists('mapi_last_hresult')) {
182			$details['hresult'] = mapi_last_hresult();
183			}
184			$this->logDebug('MAPI linkmessage failed', $details);
185			return;
186			}
187			++$this->count;
188			}
189
190			private function result_full() {
191			return $this->count >= MAX_FTS_RESULT_ITEMS;
192			}
193
194			public function search($search_entryid, $descriptor, $folder_entryid, $recursive) {
195			$startTime = microtime(true);
196			$this->logDebug('Search invoked', [
197			'user' => $this->username,
198			'search_entryid' => self::formatEntryIdForLog($search_entryid),
199			'folder_entryid' => self::formatEntryIdForLog($folder_entryid),
200			'recursive' => (bool) $recursive,
201			'descriptor' => $descriptor,
202			]);
203			if ($this->openResult) {
204			$this->logDebug('Search aborted: index database unavailable', ['open_result' => $this->openResult]);
205			return false;
206			}
207			$whereFolderids = '';
208			if (isset($folder_entryid)) {
209			try {
210			$folder = mapi_msgstore_openentry($this->store, $folder_entryid);
211			if (!$folder) {
212			return false;
213			}
214			$tmp_props = mapi_getprops($folder, [PR_FOLDER_ID]);
215			if (empty($tmp_props[PR_FOLDER_ID])) {
216			return false;
217			}
218			$folder_id = IndexSqlite::get_gc_value((int) $tmp_props[PR_FOLDER_ID]);
219			$whereFolderids .= "c.folder_id in (" . $folder_id . ", ";
220			if ($recursive) {
221			$this->getWhereFolderids($folder, $whereFolderids);
222			}
223			$whereFolderids = substr($whereFolderids, 0, -2) . ") AND ";
224			$this->logDebug('Folder scope resolved', [
225			'root_folder_gc_id' => $folder_id,
226			'folder_clause' => rtrim($whereFolderids),
227			]);
228			}
229			catch (Exception $e) {
230			error_log(sprintf("Index: error getting folder information %s - %s", $this->username, $e));
231			$this->logDebug('Failed to resolve folder scope', ['error' => $e->getMessage()]);
232
233			return false;
234			}
235			}
236			$sql_string = "SELECT c.message_id, c.entryid, c.folder_id, " .
237			"c.message_class, c.date, c.readflag, c.attach_indexed " .
238			"FROM msg_content c " .
239			"JOIN messages m ON c.message_id = m.rowid " .
240			"WHERE ";
241			if (!empty($whereFolderids)) {
242			$sql_string .= $whereFolderids;
243			}
244			$ftsAst = $descriptor['ast'] ?? null;
245			$message_classes = $descriptor['message_classes'] ?? null;
246			$date_start = $descriptor['date_start'] ?? null;
247			$date_end = $descriptor['date_end'] ?? null;
248			$unread = !empty($descriptor['unread']);
249			$has_attachments = !empty($descriptor['has_attachments']);
250			$this->logDebug('Search filters resolved', [
251			'unread' => $unread,
252			'has_attachments' => $has_attachments,
253			'date_start' => $date_start,
254			'date_end' => $date_end,
255			'message_classes_count' => is_array($message_classes) ? count($message_classes) : null,
256			]);
257
258			$ftsQuery = $this->compileFtsExpression($ftsAst);
259			if ($ftsQuery === null \|\| $ftsQuery === '') {
260			$this->logDebug('FTS query compilation returned empty expression', [
261			'ast' => $ftsAst,
262			]);
263			return false;
264			}
265
266			$sql_string .= "messages MATCH '" . $ftsQuery . "'";
267			$this->count = 0;
268			$sql_string .= " ORDER BY c.date DESC LIMIT " . MAX_FTS_RESULT_ITEMS;
269			$this->logDebug('Executing SQLite FTS query', ['sql' => $sql_string]);
270			$results = $this->query($sql_string);
271			if ($results === false) {
272			$this->logDebug('SQLite query execution failed', [
273			'error_code' => $this->lastErrorCode(),
274			'error_message' => $this->lastErrorMsg(),
275			]);
276			return false;
277			}
278			$matchedRows = 0;
279			$sampleRows = [];
280			while (($row = $results->fetchArray(SQLITE3_ASSOC)) && !$this->result_full()) {
281			++$matchedRows;
282			$previousCount = $this->count;
283			$this->try_insert_content(
284			$search_entryid,
285			$row,
286			$message_classes,
287			$date_start,
288			$date_end,
289			$unread,
290			$has_attachments
291			);
292			if ($this->count > $previousCount && count($sampleRows) < self::DEBUG_SAMPLE_LIMIT) {
293			$sampleRows[] = [
294			'message_id' => $row['message_id'] ?? null,
295			'entryid' => self::formatBinaryFieldForLog($row['entryid'] ?? null),
296			'message_class' => $row['message_class'] ?? null,
297			'date' => $row['date'] ?? null,
298			'readflag' => $row['readflag'] ?? null,
299			'attach_indexed' => $row['attach_indexed'] ?? null,
300			];
301			}
302			}
303			$durationMs = (int) round((microtime(true) - $startTime) * 1000);
304			$this->logDebug('Search completed', [
305			'fts_query' => $ftsQuery,
306			'matched_rows' => $matchedRows,
307			'linked_messages' => $this->count,
308			'limit_reached' => $this->result_full(),
309			'folder_clause' => $whereFolderids !== '' ? rtrim($whereFolderids) : null,
310			'sample_messages' => $sampleRows,
311			'duration_ms' => $durationMs,
312			]);
313
314			return true;
315			}
316
317			private function compileFtsExpression($ast) {
318			if ($ast === null) {
319			return null;
320			}
321
322			if (isset($ast['type']) && $ast['type'] === 'term') {
323			$fields = $ast['fields'] ?? [];
324			if (empty($fields)) {
325			return null;
326			}
327			$escaped = SQLite3::escapeString($this->quote_words($ast['value'] ?? ''));
328			$segments = [];
329			foreach ($fields as $field) {
330			$segments[] = $field . ':' . $escaped;
331			}
332			if (count($segments) === 1) {
333			return $segments[0];
334			}
335			return '(' . implode(' OR ', $segments) . ')';
336			}
337
338			$operator = $ast['op'] ?? null;
339			$children = $ast['children'] ?? [];
340			if ($operator === 'NOT') {
341			$child = $this->compileFtsExpression($children[0] ?? null);
342			if ($child === null) {
343			return null;
344			}
345			return 'NOT (' . $child . ')';
346			}
347			if ($operator === 'AND' \|\| $operator === 'OR') {
348			$parts = [];
349			foreach ($children as $child) {
350			$compiled = $this->compileFtsExpression($child);
351			if ($compiled !== null) {
352			$parts[] = $compiled;
353			}
354			}
355			if (empty($parts)) {
356			return null;
357			}
358			if (count($parts) === 1) {
359			return $parts[0];
360			}
361			$wrapped = array_map(function ($segment) {
362			return '(' . $segment . ')';
363			}, $parts);
364			return implode(' ' . $operator . ' ', $wrapped);
365			}
366
367			return null;
368			}
369
370			private function quote_words($search_string) {
371			return '"' . preg_replace("/(\\s+)/", '" "', trim((string) $search_string)) . '"';
372			}
373
374			/**
375			* Returns the restriction to filter hidden folders.
376			*
377			* @return array
378			*/
379			private function getHiddenRestriction() {
380			return
381			[RES_OR, [
382			[RES_PROPERTY,
383			[
384			RELOP => RELOP_EQ,
385			ULPROPTAG => PR_ATTR_HIDDEN,
386			VALUE => [PR_ATTR_HIDDEN => false],
387			],
388			],
389			[RES_NOT,
390			[
391			[RES_EXIST,
392			[
393			ULPROPTAG => PR_ATTR_HIDDEN,
394			],
395			],
396			],
397			],
398			]];
399			}
400
401			/**
402			* Returns the comma joined folderids for the WHERE clause in the SQL
403			* statement.
404			*
405			* @param mixed $folder
406			* @param string $whereFolderids
407			*/
408			private function getWhereFolderids($folder, &$whereFolderids) {
409			/**
410			* remove hidden folders, folders with PR_ATTR_HIDDEN property set
411			* should not be shown to the client.
412			*/
413			$restriction = $this->getHiddenRestriction();
414			$hierarchy = mapi_folder_gethierarchytable($folder, CONVENIENT_DEPTH \| MAPI_DEFERRED_ERRORS);
415			mapi_table_restrict($hierarchy, $restriction, TBL_BATCH);
416			$rows = mapi_table_queryallrows($hierarchy, [PR_FOLDER_ID]);
417			foreach ($rows as $row) {
418			if (isset($row[PR_FOLDER_ID])) {
419			$whereFolderids .= IndexSqlite::get_gc_value((int) $row[PR_FOLDER_ID]) . ", ";
420			}
421			}
422			}
423			}
424

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IndexSqlite::search() D

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