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⚡ Optimize Array Deduplication in Backup Endpoints #519

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Merged
sunnylqm merged 1 commit into from
Mar 3, 2026
Merged

⚡ Optimize Array Deduplication in Backup Endpoints #519

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11 changes: 8 additions & 3 deletions src/client.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -344,9 +344,14 @@ export class Pushy {
const remoteEndpoints = await resp.json();
log('fetch endpoints:', remoteEndpoints);
if (Array.isArray(remoteEndpoints)) {
server.backups = Array.from(
new Set([...(server.backups || []), ...remoteEndpoints]),
);
const backups = server.backups || [];
const set = new Set(backups);
for (const endpoint of remoteEndpoints) {
set.add(endpoint);
}
if (set.size !== backups.length) {
server.backups = Array.from(set);
}
Comment on lines +347 to +354
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@coderabbitai coderabbitai bot Mar 3, 2026

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⚠️ Potential issue | 🟠 Major

Fix merge-change detection when backups already contains duplicates.

Line 352 compares against backups.length, which can miss real additions.
Example: ['a','a','b'] + ['c'] yields set.size === 3 and skips assignment, so 'c' is lost.

Proposed fix 
-          const backups = server.backups || [];
-          const set = new Set(backups);
+          const backups = server.backups || [];
+          const set = new Set(backups);
+          const initialUniqueSize = set.size;
           for (const endpoint of remoteEndpoints) {
             set.add(endpoint);
           }
-          if (set.size !== backups.length) {
+          const hadDuplicates = backups.length !== initialUniqueSize;
+          const addedNewEndpoints = set.size !== initialUniqueSize;
+          if (hadDuplicates || addedNewEndpoints) {
             server.backups = Array.from(set);
           }
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
const backups = server.backups || [];
const set = new Set(backups);
for (const endpoint of remoteEndpoints) {
set.add(endpoint);
}
if (set.size !== backups.length) {
server.backups = Array.from(set);
}
const backups = server.backups || [];
const set = new Set(backups);
const initialUniqueSize = set.size;
for (const endpoint of remoteEndpoints) {
set.add(endpoint);
}
const hadDuplicates = backups.length !== initialUniqueSize;
const addedNewEndpoints = set.size !== initialUniqueSize;
if (hadDuplicates || addedNewEndpoints) {
server.backups = Array.from(set);
}
🤖 Prompt for AI Agents 
Verify each finding against the current code and only fix it if needed.

In `@src/client.ts` around lines 347 - 354, The current merge logic uses
backups.length to detect changes but that fails when backups already contains
duplicates; compute the deduplicated original size first (e.g., const
originalSize = new Set(backups).size), then add remoteEndpoints to the set and
compare set.size !== originalSize to decide whether to assign server.backups =
Array.from(set); reference the variables backups, remoteEndpoints,
server.backups and the Set used to dedupe.

}
} catch (e: any) {
log('failed to fetch endpoints from: ', server.queryUrls);
Expand Down