community: the library overlap shelf, their share folders against your albums on this device after a browse

src/lib/community.svelte.js

@@ -83,6 +83,8 @@ export const community = $state({
     /** space_board: the proposal board beside the open Space's pinned playlist, or null. */
     board: null,
     boardError: "",
+    /** overlap_list: library comparisons computed on this device, best first. */
+    overlap: [],
     /** persona key → ProfileView | {none} | {error} | {pending}: other
      *  people's signed profiles, read once per session when surfaced. */
     remoteProfiles: {},
@@ -335,11 +337,12 @@ export async function initCommunity() {
             void refreshShares();
             void refreshPublished();
         });
+        api.onEvent("community:overlap", () => void refreshOverlap());
         api.onEvent("soulseek:user-state", (p) => {
             if (p.status === 1 || p.status === 2) noteSeen(p.username);
         });
     }
-    await Promise.all([refreshFreenet(), loadContacts(), refreshLinks(), refreshFriends(), refreshShares(), refreshPublished(), refreshInbox(), refreshSpaces()]);
+    await Promise.all([refreshFreenet(), loadContacts(), refreshLinks(), refreshFriends(), refreshShares(), refreshPublished(), refreshInbox(), refreshSpaces(), refreshOverlap()]);
     await refreshPersona();
 }
 
@@ -581,6 +584,30 @@ export const leaveSpace = (owner, space) =>
         await refreshSpaces();
     });
 
+// ---- library overlap ------------------------------------------------------------
+export async function refreshOverlap() {
+    try {
+        community.overlap = await api.overlapList();
+    } catch {
+        // stays as it was
+    }
+}
+export const overlapFor = (username) => {
+    const k = (username ?? "").trim().toLowerCase();
+    return community.overlap.find((o) => o.username.toLowerCase() === k) ?? null;
+};
+/** Browse them on purpose and compare — nothing is uploaded to do it. */
+export const computeOverlap = (username) =>
+    run("overlap:" + username, async () => {
+        await api.overlapCompute(username);
+        await refreshOverlap();
+    });
+export const forgetOverlap = (username) =>
+    run("overlap:" + username, async () => {
+        await api.overlapForget(username);
+        await refreshOverlap();
+    });
+
 // ---- the proposal board ---------------------------------------------------------
 /** Read the board beside the Space's pinned playlist; the playlist's owner also
  *  brings its roster in line with the members here. */
@@ -621,4 +648,4 @@ export const decideProposal = (owner, space, proposal, accept, reason) =>
 // Dev handle beside `__soulstream` (state.svelte.js): probes reach the store
 // through this, never through a bare import (which would be a second copy).
 if (import.meta.env.DEV) globalThis.__community = community;
-if (import.meta.env.DEV) globalThis.__communityActions = { friendRequest, friendRequestByKey, friendAccept, friendDecline, friendRemove, friendForget, checkLink, refreshFriends, sharedPublish, sharedWithdraw, shareSend, sharePreview, shareImport, refreshShares, refreshPublished, publishInbox, checkInbox, refreshInbox, refreshSpaces, openSpace, createSpace, postToSpace, inviteToSpace, removeFromSpace, pinToSpace, leaveSpace, openBoard, proposeToBoard, decideProposal };
+if (import.meta.env.DEV) globalThis.__communityActions = { friendRequest, friendRequestByKey, friendAccept, friendDecline, friendRemove, friendForget, checkLink, refreshFriends, sharedPublish, sharedWithdraw, shareSend, sharePreview, shareImport, refreshShares, refreshPublished, publishInbox, checkInbox, refreshInbox, refreshSpaces, openSpace, createSpace, postToSpace, inviteToSpace, removeFromSpace, pinToSpace, leaveSpace, openBoard, proposeToBoard, decideProposal, refreshOverlap, computeOverlap, forgetOverlap };