Filter duplicates with map (#139)

The previous method of filtering duplicates only worked on duplicates that occurred consecutively. Since dupes happen out of order often, this switches the logic to instead use a map of seen commands and filter based on that.

client/lib/lib.go

@@ -157,19 +157,25 @@ func DisplayResults(ctx context.Context, results []*data.HistoryEntry, numResult
 	tbl := table.New(columns...)
 	tbl.WithHeaderFormatter(headerFmt)
 
-	lastCommand := ""
 	numRows := 0
+
+	var seenCommands = make(map[string]bool)
+
 	for _, entry := range results {
-		if entry != nil && strings.TrimSpace(entry.Command) == strings.TrimSpace(lastCommand) && config.FilterDuplicateCommands {
-			continue
+		if config.FilterDuplicateCommands && entry != nil {
+			cmd := strings.TrimSpace(entry.Command)
+			if seenCommands[cmd] {
+				continue
+			}
+			seenCommands[cmd] = true
 		}
+
 		row, err := BuildTableRow(ctx, config.DisplayedColumns, *entry)
 		if err != nil {
 			return err
 		}
 		tbl.AddRow(stringArrayToAnyArray(row)...)
 		numRows += 1
-		lastCommand = entry.Command
 		if numRows >= numResults {
 			break
 		}

client/tui/tui.go

@@ -498,13 +498,20 @@ func getRows(ctx context.Context, columnNames []string, query string, numEntries
 	}
 	var rows []table.Row
 	var filteredData []*data.HistoryEntry
-	lastCommand := ""
+	var seenCommands = make(map[string]bool)
+
 	for i := 0; i < numEntries; i++ {
 		if i < len(searchResults) {
 			entry := searchResults[i]
-			if strings.TrimSpace(entry.Command) == strings.TrimSpace(lastCommand) && config.FilterDuplicateCommands {
-				continue
+
+			if config.FilterDuplicateCommands && entry != nil {
+				cmd := strings.TrimSpace(entry.Command)
+				if seenCommands[cmd] {
+					continue
+				}
+				seenCommands[cmd] = true
 			}
+
 			entry.Command = strings.ReplaceAll(entry.Command, "\n", "\\n")
 			row, err := lib.BuildTableRow(ctx, columnNames, *entry)
 			if err != nil {
@@ -512,7 +519,6 @@ func getRows(ctx context.Context, columnNames []string, query string, numEntries
 			}
 			rows = append(rows, row)
 			filteredData = append(filteredData, entry)
-			lastCommand = entry.Command
 		} else {
 			rows = append(rows, table.Row{})
 		}