Initial QSfera import

Server/services/postprocessing/pkg/config/parser/parse.go

@@ -0,0 +1,60 @@
+package parser
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+
+	occfg "github.com/qsfera/server/pkg/config"
+	"github.com/qsfera/server/services/postprocessing/pkg/config"
+	"github.com/qsfera/server/services/postprocessing/pkg/config/defaults"
+	"github.com/opencloud-eu/reva/v2/pkg/events"
+
+	"github.com/qsfera/server/pkg/config/envdecode"
+)
+
+// ParseConfig loads configuration from known paths.
+func ParseConfig(cfg *config.Config) error {
+	err := occfg.BindSourcesToStructs(cfg.Service.Name, cfg)
+	if err != nil {
+		return err
+	}
+
+	defaults.EnsureDefaults(cfg)
+
+	// load all env variables relevant to the config in the current context.
+	if err := envdecode.Decode(cfg); err != nil {
+		// no environment variable set for this config is an expected "error"
+		if !errors.Is(err, envdecode.ErrNoTargetFieldsAreSet) {
+			return err
+		}
+	}
+
+	defaults.Sanitize(cfg)
+
+	return Validate(cfg)
+}
+
+// Validate validates the config
+func Validate(cfg *config.Config) error {
+	if cfg.Postprocessing.Delayprocessing != 0 {
+		if !contains(cfg.Postprocessing.Steps, events.PPStepDelay) {
+			if len(cfg.Postprocessing.Steps) > 0 {
+				s := strings.Join(append(cfg.Postprocessing.Steps, string(events.PPStepDelay)), ",")
+				fmt.Printf("Added delay step to the list of postprocessing steps. NOTE: Use envvar `POSTPROCESSING_STEPS=%s` to suppress this message and choose the order of postprocessing steps.\n", s)
+			}
+
+			cfg.Postprocessing.Steps = append(cfg.Postprocessing.Steps, string(events.PPStepDelay))
+		}
+	}
+	return nil
+}
+
+func contains(all []string, candidate events.Postprocessingstep) bool {
+	for _, s := range all {
+		if s == string(candidate) {
+			return true
+		}
+	}
+	return false
+}