andros
7631ca0e6e
Two changes to remove the main sources of scroll jank: - Index own interactions once per feed parse instead of per row. OwnInteractionCache.ingest bulk-imports reactions, boosts and poll votes from the user's own feed wherever it is already parsed (timeline load, mergeOwnFeed, FollowCoordinator.apply). The loadExisting* methods become synchronous cache reads, removing the full own-feed download + parse that ran on the main actor for every row that scrolled into view. Merge-only so a just-written interaction is never wiped by a CDN-stale copy. Vote detection no longer requires an empty body (the spec allows vote posts with text). - Keep row heights stable while scrolling. New InteractionSnapshotStore remembers the last interaction data per post for the session; PostRowView restores it synchronously in onAppear so rows recreated by the LazyVStack render at final height immediately instead of growing when /interactions/ answers. First-ever data arrival is animated instead of appearing abruptly.
39 lines
1.3 KiB
Swift
39 lines
1.3 KiB
Swift
import Foundation
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import OrgSocialKit
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/// Session-scoped memory of the last interaction data each post row showed
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/// (reply count, boost count, reaction chips, poll votes).
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///
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/// The timeline's LazyVStack discards offscreen rows. Without this store, a
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/// row recreated on scroll-back starts empty and grows a moment later when
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/// `/interactions/` answers, shifting the whole viewport mid-scroll — the
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/// "jumpy scroll" feel. Restoring the last-known values synchronously in
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/// `onAppear` keeps the row at its final height from the first frame; the
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/// network refresh still runs and updates the values in place.
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///
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/// This is UI-state memory, not a network cache: rows always refetch. A TTL
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/// cache matching the relay's 1-minute scan cadence is a separate planned
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/// improvement (see CLAUDE.md performance backlog).
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@MainActor
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final class InteractionSnapshotStore {
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struct Snapshot {
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var replyCount: Int?
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var boostCount: Int
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var reactions: [OrgSocialMood]
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var pollVotes: [OrgSocialPollVote]
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}
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static let shared = InteractionSnapshotStore()
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private var snapshots: [String: Snapshot] = [:]
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func snapshot(for postURL: String) -> Snapshot? {
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snapshots[postURL]
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}
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func store(_ snapshot: Snapshot, for postURL: String) {
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snapshots[postURL] = snapshot
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}
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}
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