xref: /plugin/struct/meta/SearchCloud.php (revision cfb9109ed875a85e889fba7b4fb7f23ac7c66e30) 
1<?php
2
3namespace dokuwiki\plugin\struct\meta;
4
5
6/**
7 * Class SearchCloud
8 *
9 * The same as @see SearchConfig, but executed a search that is not pid-focused
10 *
11 * @package dokuwiki\plugin\struct\meta
12 */
13class SearchCloud extends SearchConfig {
14
15    protected $limit = '';
16
17
18    /**
19     * Transform the set search parameters into a statement
20     *
21     * @param string $idColumn Column on which to join tables
22     * @return array ($sql, $opts) The SQL and parameters to execute
23     */
24    public function getSQL($idColumn) {
25        if(!$this->columns) throw new StructException('nocolname');
26
27        $QB = new QueryBuilder();
28        reset($this->schemas);
29        $schema = current($this->schemas);
30        $datatable = 'data_' . $schema->getTable();
31        if($idColumn === 'pid') {
32            $QB->addTable('schema_assignments');
33            $QB->filters()->whereAnd("$datatable.pid = schema_assignments.pid");
34            $QB->filters()->whereAnd("schema_assignments.tbl = '{$schema->getTable()}'");
35            $QB->filters()->whereAnd("schema_assignments.assigned = 1");
36            $QB->filters()->whereAnd("GETACCESSLEVEL($datatable.pid) > 0");
37            $QB->filters()->whereAnd("PAGEEXISTS($datatable.pid) = 1");
38        }
39        $QB->addTable($datatable);
40        $QB->filters()->whereAnd("$datatable.latest = 1");
41        $QB->filters()->where('AND', 'tag IS NOT \'\'');
42
43        $col = $this->columns[0];
44        if($col->isMulti()) {
45            $multitable = "multi_{$col->getTable()}";
46            $MN = $QB->generateTableAlias('M');
47
48            $QB->addLeftJoin(
49                $datatable,
50                $multitable,
51                $MN,
52                "$datatable.$idColumn = $MN.$idColumn AND
53                     $datatable.rev = $MN.rev AND
54                     $MN.colref = {$col->getColref()}"
55            );
56
57            $col->getType()->select($QB, $MN, 'value', 'tag');
58            $colname = $MN . '.value';
59        } else {
60            $col->getType()->select($QB, $datatable, $col->getColName(), 'tag');
61            $colname = $datatable . '.' . $col->getColName();
62        }
63        $QB->addSelectStatement("COUNT($colname)", 'count');
64        $QB->addGroupByStatement('tag');
65        $QB->addOrderBy('count DESC');
66
67        list($sql, $opts) = $QB->getSQL();
68        return [$sql . $this->limit, $opts];
69    }
70
71    /**
72     * We do not have pagination in clouds, so we can work with a limit within SQL
73     *
74     * @param int $limit
75     */
76    public function setLimit($limit) {
77        $this->limit = " LIMIT $limit";
78    }
79
80    /**
81     * Execute this search and return the result
82     *
83     * The result is a two dimensional array of Value()s.
84     *
85     * @param string $idColumn Column on which to join tables
86     * @return Value[][]
87     */
88    public function execute($idColumn) {
89        list($sql, $opts) = $this->getSQL($idColumn);
90
91        /** @var \PDOStatement $res */
92        $res = $this->sqlite->query($sql, $opts);
93        if($res === false) throw new StructException("SQL execution failed for\n\n$sql");
94
95        $result = [];
96        $rows = $this->sqlite->res2arr($res);
97
98        foreach ($rows as $row) {
99            if (!empty($this->config['min']) && $this->config['min'] > $row['count']) {
100                break;
101            }
102
103            $row['tag'] = new Value($this->columns[0], $row['tag']);
104            $result[] = $row;
105        }
106
107        $this->sqlite->res_close($res);
108        $this->count = count($result);
109        return $result;
110    }
111}
112