@jsonjoy.com/reactive-rpc
Version:
Reactive-RPC is a library for building reactive APIs over WebSocket, HTTP, and other RPCs.
71 lines • 3.03 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.upd = void 0;
const schema_1 = require("../schema");
const upd = ({ t, services }) => (r) => {
const Request = t.Object(t.prop('id', schema_1.BlockIdRef).options({
title: 'Document ID',
description: 'The ID of the document to apply the patch to.',
}), t.prop('batch', schema_1.BlockBatchPartialRef).options({
title: 'Batch',
description: 'The batch of changes to apply to the document.',
}), t.propOpt('create', t.bool).options({
title: 'Create, if not Exists',
description: 'If true, creates a new document if it does not exist.',
}), t.propOpt('seq', schema_1.BlockCurRef).options({
title: 'Sequence Number',
description: 'The last client known sequence number. The server will return history starting from this sequence number.',
}));
const Response = t.Object(t.prop('batch', schema_1.BlockBatchPartialReturnRef).options({
title: 'Committed Batch Parts',
description: 'Parts of committed batch which were generated on the server.',
}), t.propOpt('pull', t.Object(t.prop('batches', t.Array(schema_1.BlockBatchRef)).options({
title: 'Batches',
description: 'The list of batches that happened after the given sequence number.',
}), t.propOpt('snapshot', schema_1.BlockSnapshotRef).options({
title: 'Snapshot',
description: 'The snapshot of the block, to which the batches can be applied to get the current state of the block.',
}))));
const Func = t.Function(Request, Response).options({
title: 'Edit Block',
intro: 'Applies patches to an existing block.',
description: 'Applies patches to an existing document and returns the latest concurrent changes.',
});
return r.prop('block.upd', Func, async ({ id, batch, create, seq }) => {
const blocks = services.blocks;
const res = await blocks.edit(id, batch, !!create);
const response = {
batch: {
seq: res.batch.seq,
ts: res.batch.ts,
},
};
let pull;
if (typeof seq === 'number') {
const diff = res.batch.seq - seq;
if (diff <= 1) {
pull = { batches: [] };
}
else {
const needsSnapshot = diff > 100;
let min, max, limit;
if (needsSnapshot) {
min = res.batch.seq - 100;
max = res.batch.seq - 1;
limit = max - min + 1;
}
else {
min = seq + 1;
max = res.batch.seq - 1;
limit = max - min + 1;
}
pull = (await blocks.scan(id, needsSnapshot, min, limit));
}
}
if (pull)
response.pull = pull;
return response;
});
};
exports.upd = upd;
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