AdvancedSearchListModule::convertRestrictionToAst()

Complexity

Conditions	43
Paths	43

Size

Total Lines	157
Code Lines	114

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

<?php
	private function convertRestrictionToAst($restriction, $context = null) {
		$filters = $this->initFtsFilterState();

		if (!is_array($restriction) || empty($restriction)) {
			return [null, $filters];
		}

		$type = $restriction[0];
		switch ($type) {
			case RES_AND:
			case RES_OR:
				$children = [];
				$subRestrictions = $restriction[1] ?? [];
				if (is_array($subRestrictions)) {
					foreach ($subRestrictions as $subRestriction) {
						[$childAst, $childFilters] = $this->convertRestrictionToAst($subRestriction, $context);
						$filters = $this->mergeFtsFilterState($filters, $childFilters);
						if ($childAst !== null) {
							$children[] = $childAst;
						}
					}
				}
				if (empty($children)) {
					return [null, $filters];
				}
				if (count($children) === 1) {
					return [$children[0], $filters];
				}
				return [[
					'op' => $type == RES_AND ? 'AND' : 'OR',
					'children' => $children,
				], $filters];

			case RES_NOT:
				$sub = $restriction[1][0] ?? null;
				[$childAst, $childFilters] = $this->convertRestrictionToAst($sub, $context);
				$filters = $this->mergeFtsFilterState($filters, $childFilters);
				if ($childAst === null) {
					return [null, $filters];
				}
				return [[
					'op' => 'NOT',
					'children' => [$childAst],
				], $filters];

			case RES_CONTENT:
				$subres = $restriction[1];
				$propTag = $subres[ULPROPTAG] ?? null;
				if ($propTag === null) {
					return [null, $filters];
				}

				if ($propTag == PR_MESSAGE_CLASS) {
					$value = $subres[VALUE][$propTag] ?? null;
					if ($value !== null) {
						$filters['message_classes'][] = $value;
					}
					return [null, $filters];
				}

				$fields = $this->mapPropTagToFtsFields($propTag, $context);
				$value = $subres[VALUE][$propTag] ?? null;
				if (empty($fields) || $value === null) {
					return [null, $filters];
				}

				$terms = [];
				if (is_array($value)) {
					foreach ($value as $entry) {
						if ($entry !== '' && $entry !== null) {
							$terms[] = [
								'type' => 'term',
								'fields' => $fields,
								'value' => (string) $entry,
							];
						}
					}
				} else {
					$terms[] = [
						'type' => 'term',
						'fields' => $fields,
						'value' => (string) $value,
					];
				}

				if (empty($terms)) {
					return [null, $filters];
				}
				if (count($terms) === 1) {
					return [$terms[0], $filters];
				}
				return [[
					'op' => 'OR',
					'children' => $terms,
				], $filters];

			case RES_PROPERTY:
				$subres = $restriction[1];
				$propTag = $subres[ULPROPTAG] ?? null;
				if ($propTag === null) {
					return [null, $filters];
				}

				if ($propTag == PR_MESSAGE_DELIVERY_TIME || $propTag == PR_LAST_MODIFICATION_TIME) {
					$value = $subres[VALUE][$propTag] ?? null;
					if ($value !== null) {
						if ($subres[RELOP] == RELOP_LT || $subres[RELOP] == RELOP_LE) {
							$filters['date_end'] = $value;
						} elseif ($subres[RELOP] == RELOP_GT || $subres[RELOP] == RELOP_GE) {
							$filters['date_start'] = $value;
						}
					}
					return [null, $filters];
				}

				if (isset($this->properties['hide_attachments']) && $propTag == $this->properties['hide_attachments']) {
					$filters['has_attachments'] = true;
				}

				return [null, $filters];

			case RES_BITMASK:
				$subres = $restriction[1];
				if (($subres[ULPROPTAG] ?? null) == PR_MESSAGE_FLAGS && ($subres[ULTYPE] ?? null) == BMR_EQZ) {
					$filters['unread'] = true;
				}
				return [null, $filters];

			case RES_SUBRESTRICTION:
				$subres = $restriction[1];
				$propTag = $subres[ULPROPTAG] ?? null;
				if ($propTag == PR_MESSAGE_ATTACHMENTS) {
					$filters['has_attachments'] = true;
					$inner = $subres[RESTRICTION] ?? null;
					[$childAst, $childFilters] = $this->convertRestrictionToAst($inner, 'attachments');
					$filters = $this->mergeFtsFilterState($filters, $childFilters);
					return [$childAst, $filters];
				}
				if ($propTag == PR_MESSAGE_RECIPIENTS) {
					$inner = $subres[RESTRICTION] ?? null;
					[$childAst, $childFilters] = $this->convertRestrictionToAst($inner, 'recipients');
					$filters = $this->mergeFtsFilterState($filters, $childFilters);
					return [$childAst, $filters];
				}
				$inner = $subres[RESTRICTION] ?? null;
				[$childAst, $childFilters] = $this->convertRestrictionToAst($inner, $context);
				$filters = $this->mergeFtsFilterState($filters, $childFilters);
				return [$childAst, $filters];

			case RES_COMMENT:
				$inner = $restriction[1][RESTRICTION] ?? null;
				[$childAst, $childFilters] = $this->convertRestrictionToAst($inner, $context);
				$filters = $this->mergeFtsFilterState($filters, $childFilters);
				return [$childAst, $filters];

			default:
				return [null, $filters];
		}