Implement FREQUENCY (#9)

Author: ramnes

README.md

@@ -26,4 +26,5 @@ docker run -e METABASE_HOSTNAME="" -e METABASE_USE_API_KEY="" -e METABASE_API_KE
 - ```FORMAL_API_KEY```: The API key of the formal instance
 - ```FORMAL_APP_ID```: The app id of the Formal Metabase integration
 - ```VERIFY_TLS```: Whether or not to verify the TLS certificate of the Metabase instance. Set to `true` or `false`
-- ```LOG_LEVEL``` (optional): Set the Global logging level to any of these options: `debug`, `info`, `warn`, `error`, `fatal`, `panic`, `disabled`. Default value is `info`.
+- ```LOG_LEVEL``` (optional): Set the Global logging level to any of these options: `debug`, `info`, `warn`, `error`, `fatal`, `panic`, `disabled`. Default value is `info`.
+- ```FREQUENCY``` (optional): The frequency at which to run the sync. Expected format: `1h`, `30m`, etc. If not provided, the sync will run once and then exit.

main.go

@@ -3,6 +3,7 @@ package main
 import (
 	"os"
 	"strconv"
+	"time"
 
 	"github.com/rs/zerolog"
 	"github.com/rs/zerolog/log"
@@ -52,8 +53,23 @@ func main() {
 		logLevel = "info"
 	}
 
-	err = MetabaseWorkflow(metabaseIntegration, formalAPIKey, integrationID, verifyTLS)
-	if err != nil {
-		log.Fatal().Err(err).Msg("Error in MetabaseWorkflow")
+	frequency := os.Getenv("FREQUENCY")
+	var duration time.Duration
+	if frequency != "" {
+		duration, err = time.ParseDuration(frequency)
+		if err != nil {
+			log.Fatal().Err(err).Msg("Invalid FREQUENCY format. Expected format: '1h', '30m', etc.")
+		}
+	}
+
+	for {
+		err = MetabaseWorkflow(metabaseIntegration, formalAPIKey, integrationID, verifyTLS)
+		if err != nil {
+			log.Error().Err(err).Msg("Error in MetabaseWorkflow")
+		}
+		if frequency == "" {
+			break
+		}
+		time.Sleep(duration)
 	}
 }