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Mirror of https://github.com/kualta/site — web infrastructure
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TypeScript
1234567891011121314151617181920212223242526272829303132333435/** Historical pages can overlap rows already in the list. */export function uniqueHistoricalRows(list: HTMLElement, rows: HTMLElement[]): HTMLElement[] { const seen = new Set( [...list.querySelectorAll<HTMLElement>("[data-post-uri]")].map( (card) => `${card.dataset.postAction || "post"}:${card.dataset.postUri}`, ), ); return rows.filter((row) => { const card = row.querySelector<HTMLElement>("[data-post-uri]"); if (!card) return true; const key = `${card.dataset.postAction || "post"}:${card.dataset.postUri}`; if (seen.has(key)) return false; seen.add(key); return true; });}
/** Replace the newest rows up to the server page's last row; keep `existing` when nothing changed. */export function mergeNewestRows(existing: HTMLElement[], incoming: HTMLElement[]): HTMLElement[] { if (!incoming.length) return existing; const anchor = incoming[incoming.length - 1].dataset.activityRow; const index = anchor ? existing.findIndex((row) => row.dataset.activityRow === anchor) : -1; const merged = [...incoming, ...(index < 0 ? [] : existing.slice(index + 1))]; const signature = (rows: HTMLElement[]) => rows .map( (row) => `${row.dataset.activityRow || "boundary"}:${row.dataset.activityCount || ""}:${ row.dataset.activityCursor || "" }:${row.querySelector<HTMLElement>("[data-post-cid]")?.dataset.postCid || ""}`, ) .join("|"); return signature(existing) === signature(merged) ? existing : merged;}