basex-lsp/webapp/lsp/jsonrpc.xqm
2025-08-07 23:06:42 +01:00

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(:~
: jsonrpc
: @author andy bunce
:)
module namespace rpc = 'rpc';
import module namespace lsp-text = 'lsp-text' at "lsp-text.xqm";
(: map methods to functions :)
declare variable $rpc:methods:=map:merge((
map{
"initialize" : rpc:method-initialize#1,
"initialized" : rpc:method-initialized#1,
"workspace/didChangeConfiguration" :rpc:method-unknown#1
},
$lsp-text:methods
));
(:~ return map if $msg is jsonrpc else empty :)
declare
function rpc:parse($msg as xs:string)
as map(*)?
{
try {
let $json:=parse-json($msg)
return if($json?jsonrpc="2.0" and exists($json?method))
then $json
else ()
} catch *{
()
}
};
(:~ send replay to $json :)
declare
function rpc:reply($json as map(*))
as empty-sequence() {
let $method := $json?method
let $f :=$rpc:methods?($method)
let $response := $f!.($json)
return if(exists($response)) then ws:send($response=>trace("REPLY: "),ws:id())
};
(:~ canned initialize response :)
declare
function rpc:method-initialize($json as map(*))
as map(*)
{
{
"jsonrpc": "2.0",
"id": $json?id,
"result": json:doc("etc/capabilities.json",{"format":"w3"})
}
};
(:~ initialized response :)
declare
function rpc:method-initialized($json as map(*))
as empty-sequence()
{
ws:set(ws:id(),"initialized", true())
};
(:~ unknown method response :)
declare
function rpc:method-unknown($json as map(*))
as map(*)?
{
let $_:=trace($json?method,"unknown")
return ()
};
(:~ rpc log message :)
declare function rpc:log($msg as xs:string)
as map(*)
{
{"jsonrpc": "2.0",
"method":"window/logMessage",
"params":{"type":1, "message": $msg}
}
};