| 1 |
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-module(mod_caps_mnesia). |
| 2 |
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-behaviour(mod_caps_backend). |
| 3 |
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|
| 4 |
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-export([init/2, |
| 5 |
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read/2, |
| 6 |
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write/3, |
| 7 |
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delete_node/2]). |
| 8 |
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|
| 9 |
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-record(caps_features, |
| 10 |
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{ |
| 11 |
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node_pair = {<<>>, <<>>} :: mod_caps:node_pair(), |
| 12 |
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features = [] :: mod_caps:maybe_pending_features() |
| 13 |
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}). |
| 14 |
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|
| 15 |
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-spec init(mongooseim:host_type(), gen_mod:module_opts()) -> ok. |
| 16 |
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init(_HostName, _Opts) -> |
| 17 |
2 |
case catch mnesia:table_info(caps_features, storage_type) of |
| 18 |
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{'EXIT', _} -> |
| 19 |
1 |
ok; |
| 20 |
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disc_only_copies -> |
| 21 |
1 |
ok; |
| 22 |
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_ -> |
| 23 |
:-( |
mnesia:delete_table(caps_features) |
| 24 |
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end, |
| 25 |
2 |
mongoose_mnesia:create_table(caps_features, |
| 26 |
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[{disc_only_copies, [node()]}, |
| 27 |
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{local_content, true}, |
| 28 |
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{attributes, record_info(fields, caps_features)}]), |
| 29 |
2 |
ok. |
| 30 |
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|
| 31 |
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-spec read(mongooseim:host_type(), mod_caps:node_pair()) -> |
| 32 |
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{ok, mod_caps:maybe_pending_features()} | error. |
| 33 |
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read(_HostType, Node) -> |
| 34 |
:-( |
case mnesia:dirty_read({caps_features, Node}) of |
| 35 |
:-( |
[#caps_features{features = Features}] -> {ok, Features}; |
| 36 |
:-( |
_ -> error |
| 37 |
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end. |
| 38 |
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|
| 39 |
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-spec write(mongooseim:host_type(), mod_caps:node_pair(), |
| 40 |
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mod_caps:maybe_pending_features()) -> ok. |
| 41 |
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write(_HostType, Node, Features) -> |
| 42 |
:-( |
mnesia:dirty_write(#caps_features{node_pair = Node, |
| 43 |
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features = Features}), |
| 44 |
:-( |
ok. |
| 45 |
|
|
| 46 |
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-spec delete_node(mongooseim:host_type(), mod_caps:node_pair()) -> ok. |
| 47 |
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delete_node(_HostType, Node) -> |
| 48 |
:-( |
mnesia:dirty_delete(caps_features, Node), |
| 49 |
:-( |
ok. |