wip: debugging why parameters don't substitute right

cmd/gotelem/cli/server.go

@@ -69,7 +69,6 @@ type svcDeps struct {
 var serveThings = []service{
 	&xBeeService{},
 	&canLoggerService{},
-	&rpcService{},
 	&dbWriterService{},
 	&httpService{},
 }
@@ -326,8 +325,21 @@ func (h *httpService) Start(cCtx *cli.Context, deps svcDeps) (err error) {
 
 	r := gotelem.TelemRouter(logger, broker, db)
 
+	// 
+
 	/// TODO: use custom port if specified
-	http.ListenAndServe(":8080", r)
+	server := &http.Server{
+		Addr: ":8080",
+		Handler: r,
+	}
+	go func() {
+		<- cCtx.Done()
+		logger.Info("shutting down server")
+		server.Shutdown(cCtx.Context)
+	}()
+	if err := server.ListenAndServe(); err != http.ErrServerClosed {
+		logger.ErrorCtx(cCtx.Context, "Error listening", "err", err)
+	}
 	return
 }
 

http.go

@@ -6,6 +6,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"net/http"
+	"time"
 
 	"github.com/go-chi/chi/v5"
 	"github.com/go-chi/chi/v5/middleware"
@@ -82,10 +83,40 @@ func apiV1(broker *Broker, db *db.TelemDb) chi.Router {
 		})
 
 		// this is to get a single field
-		r.Get("/{name:[a-z_]+}/{field:[a-z_]}", func(w http.ResponseWriter, r *http.Request) {
+		r.Get("/{name:[a-z_]+}/{field:[a-z_]+}", func(w http.ResponseWriter, r *http.Request) {
+			var err error
 
 			// we need a start and end time. If none is provided,
 			// we use unix epoch as start, and now + 1 day as end.
+			start := time.Unix(0,0)
+			startString := r.URL.Query().Get("start")
+			if startString != "" {
+				start, err = time.Parse(time.RFC3339, startString)
+				if err != nil {
+
+				}
+			}
+			end := time.Now().Add(1*time.Hour)
+			endParam := r.URL.Query().Get("start")
+			if endParam != "" {
+				end, err = time.Parse(time.RFC3339, endParam)
+				if err != nil {
+				}
+			}
+			name := chi.URLParam(r, "name")
+			field := chi.URLParam(r, "field")
+			// TODO: add limit/pagination ?
+
+
+			res, err := db.GetValues(r.Context(), name, field, start, end)
+			if err != nil {
+				// 500 server error:
+				fmt.Print(err)
+			}
+			b, err := json.Marshal(res)
+			fmt.Print(b)
+			w.Write(b)
+
 		})
 
 	})

internal/db/getters.go

@@ -2,7 +2,7 @@ package db
 
 import (
 	"context"
-	"strings"
+	"fmt"
 	"time"
 )
 
@@ -23,17 +23,16 @@ func (tdb *TelemDb) GetValues(ctx context.Context, packetName, field string , st
 	const SqlFrag = `
 	SELECT 
 	datetime(ts /1000.0, 'unixepoch', 'subsec') as timestamp,
-	json_extract(data, ?) as val,
-	FROM bus_events WHERE name IS ? AND timestamp BETWEEN ? AND ?
+	json_extract(data, ?) as val
+	FROM bus_events WHERE name IS ?;
 	`
 
-	fieldJson := "$." + field
-
-	rows, err := tdb.db.QueryxContext(ctx, fieldJson, packetName, start, end)
-	defer rows.Close()
+	rows, err := tdb.db.QueryxContext(ctx, "'$.current'", packetName)
 	if err != nil {
+		fmt.Print(err)
 		return nil, err
 	}
+	defer rows.Close()
 	data := make([]Datum, 0, 10)
 	for rows.Next() {
 		var d Datum