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fix: use switch instead of ifs

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This commit is contained in:
Alex Yang 2023-10-30 19:55:05 -05:00
parent 9a7b659919
commit 53558645c3
1 changed files with 34 additions and 28 deletions
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62
src/utils/updates.js
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@ -49,34 +49,40 @@ function * lazyStructReaderGenerator (decoder) {
let clock = decoding.readVarUint(decoder.restDecoder)
for (let i = 0; i < numberOfStructs; i++) {
const info = decoder.readInfo()
// @todo use switch instead of ifs
if (info === 10) {
const len = decoding.readVarUint(decoder.restDecoder)
yield new Skip(createID(client, clock), len)
clock += len
} else if ((binary.BITS5 & info) !== 0) {
const cantCopyParentInfo = (info & (binary.BIT7 | binary.BIT8)) === 0
// If parent = null and neither left nor right are defined, then we know that `parent` is child of `y`
// and we read the next string as parentYKey.
// It indicates how we store/retrieve parent from `y.share`
// @type {string|null}
const struct = new Item(
createID(client, clock),
null, // left
(info & binary.BIT8) === binary.BIT8 ? decoder.readLeftID() : null, // origin
null, // right
(info & binary.BIT7) === binary.BIT7 ? decoder.readRightID() : null, // right origin
// @ts-ignore Force writing a string here.
cantCopyParentInfo ? (decoder.readParentInfo() ? decoder.readString() : decoder.readLeftID()) : null, // parent
cantCopyParentInfo && (info & binary.BIT6) === binary.BIT6 ? decoder.readString() : null, // parentSub
readItemContent(decoder, info) // item content
)
yield struct
clock += struct.length
} else {
const len = decoder.readLen()
yield new GC(createID(client, clock), len)
clock += len
switch (true) {
case (info === 10): {
const len = decoding.readVarUint(decoder.restDecoder)
yield new Skip(createID(client, clock), len)
clock += len
break
}
case ((binary.BITS5 & info) !== 0): {
const cantCopyParentInfo = (info & (binary.BIT7 | binary.BIT8)) === 0
// If parent = null and neither left nor right are defined, then we know that `parent` is child of `y`
// and we read the next string as parentYKey.
// It indicates how we store/retrieve parent from `y.share`
// @type {string|null}
const struct = new Item(
createID(client, clock),
null, // left
(info & binary.BIT8) === binary.BIT8 ? decoder.readLeftID() : null, // origin
null, // right
(info & binary.BIT7) === binary.BIT7 ? decoder.readRightID() : null, // right origin
// @ts-ignore Force writing a string here.
cantCopyParentInfo ? (decoder.readParentInfo() ? decoder.readString() : decoder.readLeftID()) : null, // parent
cantCopyParentInfo && (info & binary.BIT6) === binary.BIT6 ? decoder.readString() : null, // parentSub
readItemContent(decoder, info) // item content
)
yield struct
clock += struct.length
break
}
default: {
const len = decoder.readLen()
yield new GC(createID(client, clock), len)
clock += len
break
}
}
}
}