🦋

pkg/config/api.go

@@ -0,0 +1,70 @@
+package config
+
+import (
+	"fmt"
+	"net/url"
+	"slices"
+
+	"github.com/aykhans/bsky-feedgen/pkg/types"
+	"github.com/aykhans/bsky-feedgen/pkg/utils"
+	"github.com/whyrusleeping/go-did"
+)
+
+type APIConfig struct {
+	FeedgenHostname     *url.URL
+	ServiceDID          *did.DID
+	FeedgenPublisherDID *did.DID
+	APIPort             uint16
+}
+
+func NewAPIConfig() (*APIConfig, types.ErrMap) {
+	errs := make(types.ErrMap)
+
+	defaultHostname, _ := url.Parse("http://localhost")
+	feedgenHostname, err := utils.GetEnvOr("FEEDGEN_HOSTNAME", defaultHostname)
+	if err != nil {
+		errs["FEEDGEN_HOSTNAME"] = err
+	} else {
+		if !slices.Contains([]string{"", "http", "https"}, feedgenHostname.Scheme) {
+			errs["FEEDGEN_HOSTNAME"] = fmt.Errorf(
+				"invalid schema '%s' for FEEDGEN_HOSTNAME. Accepted schemas are: '', 'http', 'https'",
+				feedgenHostname.Scheme,
+			)
+		}
+	}
+
+	serviceDID, err := did.ParseDID("did:web:" + feedgenHostname.Hostname())
+	if err != nil {
+		errs["SERVICE_DID"] = fmt.Errorf("failed to parse service DID: %w", err)
+	}
+
+	defaultDID, _ := did.ParseDID("did:plc:development")
+	feedgenPublisherDID, err := utils.GetEnvOr("FEEDGEN_PUBLISHER_DID", &defaultDID)
+	if err != nil {
+		errs["FEEDGEN_PUBLISHER_DID"] = err
+	}
+
+	apiPort, err := utils.GetEnv[uint16]("API_PORT")
+	if err != nil {
+		errs["API_PORT"] = err
+	}
+
+	if len(errs) > 0 {
+		return nil, errs
+	}
+
+	if feedgenHostname.Scheme == "" {
+		if feedgenHostname.Host == "" {
+			feedgenHostname, _ = url.Parse("https://" + feedgenHostname.String())
+		} else {
+			feedgenHostname.Scheme = "https://"
+		}
+	}
+
+	return &APIConfig{
+		FeedgenHostname:     feedgenHostname,
+		ServiceDID:          &serviceDID,
+		FeedgenPublisherDID: feedgenPublisherDID,
+		APIPort:             apiPort,
+	}, nil
+}