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| Rev | Author | Line No. | Line |
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| 360 | daniel-mar | 1 | <?php |
| 2 | |||
| 3 | /* |
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| 4 | * OIDplus 2.0 |
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| 5 | * Copyright 2019 Daniel Marschall, ViaThinkSoft |
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| 6 | * |
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| 7 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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| 8 | * you may not use this file except in compliance with the License. |
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| 9 | * You may obtain a copy of the License at |
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| 10 | * |
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| 11 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 12 | * |
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| 13 | * Unless required by applicable law or agreed to in writing, software |
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| 14 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 15 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 16 | * See the License for the specific language governing permissions and |
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| 17 | * limitations under the License. |
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| 18 | */ |
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| 19 | |||
| 20 | class OIDplusSqlSlangPluginSQLite extends OIDplusSqlSlangPlugin { |
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| 21 | |||
| 22 | public static function id(): string { |
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| 23 | return 'sqlite'; |
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| 24 | } |
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| 25 | |||
| 26 | public function natOrder($fieldname, $order='asc'): string { |
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| 27 | |||
| 28 | $order = strtolower($order); |
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| 29 | if (($order != 'asc') && ($order != 'desc')) { |
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| 30 | throw new OIDplusException(_L('Invalid order "%1" (needs to be "asc" or "desc")',$order)); |
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| 31 | } |
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| 32 | |||
| 33 | $out = array(); |
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| 34 | |||
| 35 | // If the SQLite database is accessed through the SQLite3 plugin, |
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| 36 | // we use an individual collation, therefore OIDplusDatabasePluginSQLite3 overrides |
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| 37 | // natOrder(). |
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| 38 | // If we connected to SQLite using ODBC or PDO, we need to do something else, |
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| 39 | // but that solution is complex, slow and wrong (since it does not support |
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| 40 | // UUIDs etc.) |
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| 41 | |||
| 42 | $max_depth = OIDplus::baseConfig()->getValue('LIMITS_MAX_OID_DEPTH'); |
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| 43 | if ($max_depth > 11) $max_depth = 11; // SQLite3 will crash if max depth > 11 (parser stack overflow); (TODO: can we do something else?!?!) |
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| 44 | |||
| 45 | // 1. sort by namespace (oid, guid, ...) |
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| 46 | $out[] = "substr($fieldname,0,instr($fieldname,':')) $order"; |
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| 47 | |||
| 48 | // 2. Sort by the rest arcs one by one |
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| 49 | for ($i=1; $i<=$max_depth; $i++) { |
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| 50 | if ($i==1) { |
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| 51 | $arc = "substr($fieldname,5)||'.'"; |
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| 52 | $fieldname = $arc; |
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| 53 | $arc = "substr($arc,0,instr($arc,'.'))"; |
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| 54 | $out[] = "cast($arc as integer) $order"; |
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| 55 | } else { |
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| 56 | $arc = "ltrim(ltrim($fieldname,'0123456789'),'.')"; |
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| 57 | $fieldname = $arc; |
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| 58 | $arc = "substr($arc,0,instr($arc,'.'))"; |
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| 59 | $out[] = "cast($arc as integer) $order"; |
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| 60 | } |
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| 61 | } |
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| 62 | |||
| 63 | // 3. as last resort, sort by the identifier itself, e.g. if the function getOidArc always return 0 (happens if it is not an OID) |
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| 64 | $out[] = "$fieldname $order"; |
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| 65 | |||
| 66 | return implode(', ', $out); |
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| 67 | |||
| 68 | } |
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| 69 | |||
| 70 | public function sqlDate(): string { |
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| 71 | return 'datetime()'; |
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| 72 | } |
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| 73 | |||
| 74 | public function detect(OIDplusDatabaseConnection $db): bool { |
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| 75 | try { |
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| 386 | daniel-mar | 76 | $db->query("select sqlite_version as dbms_version"); |
| 77 | return true; |
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| 360 | daniel-mar | 78 | } catch (Exception $e) { |
| 79 | return false; |
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| 80 | } |
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| 81 | } |
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| 82 | |||
| 83 | public function insert_id(OIDplusDatabaseConnection $db): int { |
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| 84 | $res = $db->query("SELECT last_insert_rowid() AS ID"); |
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| 85 | $row = $res->fetch_array(); |
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| 86 | return (int)$row['ID']; |
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| 87 | } |
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| 88 | |||
| 89 | public function setupSetTablePrefix($cont, $table, $prefix): string { |
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| 90 | $cont = str_replace('`'.$table.'`', '`'.$prefix.$table.'`', $cont); |
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| 91 | return $cont; |
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| 92 | } |
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| 93 | |||
| 94 | public function setupCreateDbIfNotExists($database): string { |
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| 95 | return ""; |
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| 96 | } |
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| 97 | |||
| 98 | public function setupUseDatabase($database): string { |
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| 99 | return ""; |
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| 100 | } |
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| 101 | } |