@graphprotocol/client-polling-live
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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 } = {} } = {}) {
return {
onSchemaChange({ schema, replaceSchema }) {
if (!schema.getDirective('live')) {
replaceSchema((0, schema_1.mergeSchemas)({
schemas: [schema],
typeDefs: /* GraphQL */ `
directive @live(interval: Int) on QUERY
`,
}));
}
},
onExecute({ args, executeFn, setExecuteFn }) {
var _a, _b;
let liveDirectiveNode;
args.document = (0, graphql_1.visit)(args.document, {
OperationDefinition(node) {
var _a;
if (args.operationName != null && ((_a = node.name) === null || _a === void 0 ? void 0 : _a.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 = (_a = liveDirectiveNode.arguments) === null || _a === void 0 ? void 0 : _a.find((argNode) => argNode.name.value === 'interval');
let intervalMs = defaultInterval;
if (((_b = intervalArgNode === null || intervalArgNode === void 0 ? void 0 : intervalArgNode.value) === null || _b === void 0 ? void 0 : _b.kind) === graphql_1.Kind.INT) {
intervalMs = parseInt(intervalArgNode.value.value);
}
setExecuteFn((args) => new repeater_1.Repeater((push, stop) => {
let finished = false;
async function pump() {
if (finished) {
return;
}
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;