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paginate followers

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This commit is contained in:
Doug Hoyte
2024-12-19 00:44:16 -05:00
parent 20440f95bb
commit 87af802aa0
7 changed files with 57 additions and 7 deletions
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8
src/apps/web/WebData.h
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@ -128,13 +128,15 @@ struct User {
kind3Event = loadKindEvent(txn, decomp, 3);
}
std::vector<std::string> getFollowers(lmdb::txn &txn, Decompressor &decomp, const std::string &pubkey) {
std::vector<std::string> getFollowers(lmdb::txn &txn, Decompressor &decomp, const std::string &pubkey, uint64_t offset = 0, uint64_t limit = MAX_U64, uint64_t *countOut = nullptr) {
std::vector<std::string> output;
flat_hash_set<std::string> alreadySeen;
std::string prefix = "p";
prefix += pubkey;
uint64_t curr = 0;
env.generic_foreachFull(txn, env.dbi_Event__tag, prefix, "", [&](std::string_view k, std::string_view v){
ParsedKey_StringUint64 parsedKey(k);
if (parsedKey.s != prefix) return false;
@ -148,13 +150,15 @@ struct User {
if (!alreadySeen.contains(pubkey)) {
alreadySeen.insert(pubkey);
output.emplace_back(std::move(pubkey));
curr++;
if (curr >= offset && curr - offset < limit) output.emplace_back(std::move(pubkey));
}
}
return true;
});
if (countOut) *countOut = curr;
return output;
}
};