47 lines
1.3 KiB
Go
47 lines
1.3 KiB
Go
//go:build !(js && wasm)
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package database
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import (
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"context"
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"git.mleku.dev/mleku/nostr/encoders/filter"
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)
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// CountEvents mirrors the initial selection logic of QueryEvents but stops
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// once we have identified candidate event serials (id/pk/ts). It returns the
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// count of those serials. The `approx` flag is always false as requested.
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func (d *D) CountEvents(c context.Context, f *filter.F) (
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count int, approx bool, err error,
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) {
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approx = false
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if f == nil {
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return 0, false, nil
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}
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// If explicit Ids are provided, count how many of them resolve to serials.
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if f.Ids != nil && f.Ids.Len() > 0 {
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var serials map[string]interface{}
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// Use type inference without importing extra packages by discarding the
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// concrete value type via a two-step assignment.
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if tmp, idErr := d.GetSerialsByIds(f.Ids); idErr != nil {
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return 0, false, idErr
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} else {
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// Reassign to a map with empty interface values to avoid referencing
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// the concrete Uint40 type here.
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serials = make(map[string]interface{}, len(tmp))
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for k := range tmp {
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serials[k] = struct{}{}
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}
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}
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return len(serials), false, nil
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}
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// Otherwise, query for candidate Id/Pubkey/Timestamp triplets and count them.
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if idPkTs, qErr := d.QueryForIds(c, f); qErr != nil {
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return 0, false, qErr
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} else {
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return len(idPkTs), false, nil
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}
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}
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