83 lines
2.3 KiB
Go
83 lines
2.3 KiB
Go
package sqlite3
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import (
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"database/sql"
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"fmt"
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"github.com/matrix-org/dendrite/internal/sqlutil"
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)
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type FilterOrder int
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const (
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FilterOrderNone = iota
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FilterOrderAsc
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FilterOrderDesc
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)
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// prepareWithFilters returns a prepared statement with the
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// relevant filters included. It also includes an []interface{}
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// list of all the relevant parameters to pass straight to
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// QueryContext, QueryRowContext etc.
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// We don't take the filter object directly here because the
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// fields might come from either a StateFilter or an EventFilter,
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// and it's easier just to have the caller extract the relevant
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// parts.
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func prepareWithFilters(
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db *sql.DB, txn *sql.Tx, query string, params []interface{},
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senders, notsenders, types, nottypes []string, excludeEventIDs []string,
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limit int, order FilterOrder,
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) (*sql.Stmt, []interface{}, error) {
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offset := len(params)
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if count := len(senders); count > 0 {
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query += " AND sender IN " + sqlutil.QueryVariadicOffset(count, offset)
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for _, v := range senders {
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params, offset = append(params, v), offset+1
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}
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}
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if count := len(notsenders); count > 0 {
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query += " AND sender NOT IN " + sqlutil.QueryVariadicOffset(count, offset)
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for _, v := range notsenders {
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params, offset = append(params, v), offset+1
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}
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}
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if count := len(types); count > 0 {
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query += " AND type IN " + sqlutil.QueryVariadicOffset(count, offset)
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for _, v := range types {
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params, offset = append(params, v), offset+1
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}
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}
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if count := len(nottypes); count > 0 {
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query += " AND type NOT IN " + sqlutil.QueryVariadicOffset(count, offset)
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for _, v := range nottypes {
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params, offset = append(params, v), offset+1
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}
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}
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if count := len(excludeEventIDs); count > 0 {
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query += " AND event_id NOT IN " + sqlutil.QueryVariadicOffset(count, offset)
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for _, v := range excludeEventIDs {
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params, offset = append(params, v), offset+1
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}
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}
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switch order {
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case FilterOrderAsc:
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query += " ORDER BY id ASC"
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case FilterOrderDesc:
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query += " ORDER BY id DESC"
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}
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query += fmt.Sprintf(" LIMIT $%d", offset+1)
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params = append(params, limit)
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var stmt *sql.Stmt
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var err error
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if txn != nil {
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stmt, err = txn.Prepare(query)
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} else {
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stmt, err = db.Prepare(query)
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}
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if err != nil {
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return nil, nil, fmt.Errorf("s.db.Prepare: %w", err)
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}
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return stmt, params, nil
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}
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