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Pinafore-Web-Client-Frontend/routes/_utils/statuses.js
2018-01-18 20:25:34 -08:00

33 lines
1002 B
JavaScript

// Merge two lists of statuses for the same timeline, e.g. one from IDB
// and another from the network. In case of duplicates, prefer the fresh.
export function mergeStatuses(leftStatuses, rightStatuses) {
let leftIndex = 0
let rightIndex = 0
let merged = []
while (leftIndex < leftStatuses.length || rightIndex < rightStatuses.length) {
if (leftIndex === leftStatuses.length) {
merged.push(rightStatuses[rightIndex])
rightIndex++
continue
}
if (rightIndex === rightStatuses.length) {
merged.push(leftStatuses[leftIndex])
leftIndex++
continue
}
let left = leftStatuses[leftIndex]
let right = rightStatuses[rightIndex]
if (right.id === left.id) {
merged.push(right.pinafore_stale ? left : right)
rightIndex++
leftIndex++
} else if (parseInt(right.id, 10) > parseInt(left.id, 10)) {
merged.push(right)
rightIndex++
} else {
merged.push(left)
leftIndex++
}
}
return merged
}