@graphprotocol/client-polling-live
Version:
98 lines (97 loc) • 4.37 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const core_1 = require("@envelop/core");
const graphql_1 = require("graphql");
const repeater_1 = require("@repeaterjs/repeater");
const schema_1 = require("@graphql-tools/schema");
function usePollingLive({ config: { defaultInterval = 1000, defaultPauseOnBackground = true } = {}, } = {}) {
return {
onSchemaChange({ schema, replaceSchema }) {
if (!schema.getDirective('live')) {
replaceSchema((0, schema_1.mergeSchemas)({
schemas: [schema],
typeDefs: /* GraphQL */ `
directive @live(interval: Int = ${defaultInterval}, pauseOnBackground: Boolean = ${defaultPauseOnBackground}) on QUERY
`,
assumeValid: true,
assumeValidSDL: true,
}));
}
},
onExecute({ args, executeFn, setExecuteFn }) {
let liveDirectiveNode;
args.document = (0, graphql_1.visit)(args.document, {
OperationDefinition(node) {
if (args.operationName != null && node.name?.value !== args.operationName) {
return;
}
const directives = [];
if (node.directives && node.operation === 'query') {
for (const directive of node.directives) {
if (directive.name.value === 'live') {
liveDirectiveNode = directive;
}
else {
directives.push(directive);
}
}
return {
...node,
directives,
};
}
return node;
},
});
if (liveDirectiveNode) {
const intervalArgNode = liveDirectiveNode.arguments?.find((argNode) => argNode.name.value === 'interval');
let pauseOnBackground = defaultPauseOnBackground;
const pauseOnBackgroundArgNode = liveDirectiveNode.arguments?.find((argNode) => argNode.name.value === 'pauseOnBackground');
if (pauseOnBackgroundArgNode?.value?.kind === graphql_1.Kind.BOOLEAN) {
pauseOnBackground = pauseOnBackgroundArgNode.value.value;
}
let intervalMs = defaultInterval;
if (intervalArgNode?.value?.kind === graphql_1.Kind.INT) {
intervalMs = parseInt(intervalArgNode.value.value);
}
function checkHidden() {
if (!pauseOnBackground) {
return false;
}
return globalThis.document?.hidden ?? false;
}
setExecuteFn((args) => new repeater_1.Repeater((push, stop) => {
let finished = false;
async function pump() {
if (finished) {
return;
}
if (!checkHidden()) {
const result = await executeFn(args);
if ((0, core_1.isAsyncIterable)(result)) {
push({
data: null,
errors: [new graphql_1.GraphQLError('Execution returned AsyncIterable which is not supported!')],
isLive: true,
});
stop();
return;
}
result.isLive = true;
if (finished) {
return;
}
push(result);
}
setTimeout(pump, intervalMs);
}
pump();
stop.then(() => {
finished = true;
});
}));
}
},
};
}
exports.default = usePollingLive;