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1 | <?php |
2 | |
3 | namespace MediaWiki\Extension\CommunityConfiguration\Schema; |
4 | |
5 | use InvalidArgumentException; |
6 | |
7 | /** |
8 | * Class capable of reading a schema from a file (represented as a PHP class, or otherwise). |
9 | * Implementations remember which schema they are reading |
10 | */ |
11 | interface SchemaReader { |
12 | |
13 | /** |
14 | * Are we pointed at a schema? |
15 | * |
16 | * Answer is based on the data passed through the constructor. |
17 | * |
18 | * @see SchemaReader::assertIsSchema() |
19 | * @return bool |
20 | */ |
21 | public function isSchema(): bool; |
22 | |
23 | /** |
24 | * Throw an exception if not pointed at a schema |
25 | * |
26 | * @throws InvalidArgumentException when not processing a schema (isSchema returns false); |
27 | * this is based on data passed through the constructor. |
28 | * @see SchemaReader::isSchema() |
29 | * @return void |
30 | */ |
31 | public function assertIsSchema(): void; |
32 | |
33 | /** |
34 | * Get the schema version (if applicable) |
35 | * |
36 | * Returned versions should be comparable via PHP's version_compare. |
37 | * |
38 | * @return string|null Version (or null if unavailable) |
39 | */ |
40 | public function getVersion(): ?string; |
41 | |
42 | /** |
43 | * Get the next schema version (if available) |
44 | * |
45 | * Returned versions should be comparable via PHP's version_compare. |
46 | * |
47 | * @return string|null Version (or null if not available) |
48 | */ |
49 | public function getNextVersion(): ?string; |
50 | |
51 | /** |
52 | * Get the previous schema version (if available) |
53 | * |
54 | * Returned versions should be comparable via PHP's version_compare. |
55 | * |
56 | * @return string|null Version (or null if not available) |
57 | */ |
58 | public function getPreviousVersion(): ?string; |
59 | |
60 | /** |
61 | * Get a schema ID |
62 | * |
63 | * A schema ID uniquely identifies a certain schema. |
64 | * |
65 | * @return string |
66 | */ |
67 | public function getSchemaId(): string; |
68 | |
69 | /** |
70 | * Return a schema converter |
71 | * |
72 | * A schema converter is able to convert data to conform |
73 | * to this schema version, using data conforming to the immediately preceding |
74 | * (or succeeding) schema versions. |
75 | * |
76 | * @see ISchemaConverter |
77 | * @return string|null Classname of an ISchemaConverter implementation |
78 | */ |
79 | public function getSchemaConverterId(): ?string; |
80 | } |