Wworking on improving the tool

internal/datasource/epics/archive.go

@@ -7,6 +7,7 @@ import (
 	"net/http"
 	"net/url"
 	"strconv"
+	"strings"
 	"time"
 
 	"github.com/uopi/uopi/internal/datasource"
@@ -117,6 +118,55 @@ func fetchArchiveHistory(ctx context.Context, archiveURL, signal string, start,
 	return out, nil
 }
 
+// searchArchivePVs queries the Archive Appliance management API for PV names
+// matching the given pattern (glob style, e.g. "PV:*").
+func searchArchivePVs(ctx context.Context, archiveURL, pattern string) ([]string, error) {
+	if archiveURL == "" {
+		return nil, nil
+	}
+
+	// Build the request URL.
+	// Format: GET {archiveURL}/mgmt/bpl/getAllPVs?pv={pattern}
+	reqURL, err := url.Parse(archiveURL)
+	if err != nil {
+		return nil, fmt.Errorf("epics archive: invalid archive URL %q: %w", archiveURL, err)
+	}
+	reqURL = reqURL.JoinPath("mgmt", "bpl", "getAllPVs")
+
+	q := reqURL.Query()
+	if pattern == "" {
+		pattern = "*"
+	}
+	// AA expects glob patterns. If no glob characters, wrap in stars.
+	if !strings.ContainsAny(pattern, "*?[]") {
+		pattern = "*" + pattern + "*"
+	}
+	q.Set("pv", pattern)
+	reqURL.RawQuery = q.Encode()
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, reqURL.String(), nil)
+	if err != nil {
+		return nil, fmt.Errorf("epics archive: building request: %w", err)
+	}
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("epics archive: HTTP request failed: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("epics archive: unexpected status %d for search %q", resp.StatusCode, pattern)
+	}
+
+	var pvs []string
+	if err := json.NewDecoder(resp.Body).Decode(&pvs); err != nil {
+		return nil, fmt.Errorf("epics archive: decoding response: %w", err)
+	}
+
+	return pvs, nil
+}
+
 // coerceArchiveValue converts the raw JSON value (which json.Unmarshal decodes
 // as float64, string, bool, []interface{}, or nil) into one of the types
 // accepted by datasource.Value.Data.