reworked diddoc fetch, added pds fetch

1 files changed, 60 insertions, 7 deletions

diff --git a/backend/fetchers/profiles.go b/backend/fetchers/profiles.go
index 9a1334a..e98dc00 100644
--- a/backend/fetchers/profiles.go
+++ b/backend/fetchers/profiles.go
@@ -9,29 +9,44 @@ import (
 	"strings"
 )
 
-func FetchHandle(did string) (string, error) {
+type DIDDocument struct {
+	AlsoKnownAs []string `json:"alsoKnownAs"`
+	Service     []struct {
+		ID              string `json:"id"`
+		Type            string `json:"type"`
+		ServiceEndpoint string `json:"serviceEndpoint"`
+	} `json:"service"`
+}
+
+func FetchDidDoc(did string) (*DIDDocument, error) {
 	didDocURL := fmt.Sprintf("https://plc.directory/%s", did)
 
 	resp, err := http.Get(didDocURL)
 	if err != nil {
-		return "", err
+		return nil, err
 	}
 	defer resp.Body.Close()
 
 	if resp.StatusCode != 200 {
-		return "", fmt.Errorf("DID resolution failed: %d", resp.StatusCode)
+		return nil, fmt.Errorf("DID resolution failed: %d", resp.StatusCode)
 	}
 
 	body, err := io.ReadAll(resp.Body)
 	if err != nil {
-		return "", err
+		return nil, err
 	}
 
-	var didDoc struct {
-		AlsoKnownAs []string `json:"alsoKnownAs"`
+	var didDoc DIDDocument
+	err = json.Unmarshal(body, &didDoc)
+	if err != nil {
+		return nil, err
 	}
 
-	err = json.Unmarshal(body, &didDoc)
+	return &didDoc, nil
+}
+
+func FetchHandle(did string) (string, error) {
+	var didDoc, err = FetchDidDoc(did)
 	if err != nil {
 		return "", err
 	}
@@ -44,6 +59,44 @@ func FetchHandle(did string) (string, error) {
 	return handle, nil
 }
 
+func FetchPDS(did string) (string, error) {
+	var didDoc, err = FetchDidDoc(did)
+	if err != nil {
+		return "", err
+	}
+
+	for _, svc := range didDoc.Service {
+		if svc.Type == "AtprotoPersonalDataServer" {
+			return svc.ServiceEndpoint, nil
+		}
+	}
+
+	return "", fmt.Errorf("no PDS found for DID %s", did)
+}
+
+func FetchHandleAndPDS(did string) (string, string, error) {
+	var didDoc, err = FetchDidDoc(did)
+	if err != nil {
+		return "", "", err
+	}
+
+	if len(didDoc.AlsoKnownAs) == 0 {
+		return "", "", fmt.Errorf("no handle found")
+	}
+
+	var pds string
+	for _, svc := range didDoc.Service {
+		if svc.Type == "AtprotoPersonalDataServer" {
+			pds = svc.ServiceEndpoint
+			break
+		}
+	}
+
+	handle := strings.TrimPrefix(didDoc.AlsoKnownAs[0], "at://")
+
+	return handle, pds, nil
+}
+
 func FetchProfile(did string, pdsURL string) (*general.Profile, error) {
 	recordURL := fmt.Sprintf("%s/xrpc/com.atproto.repo.getRecord?repo=%s&collection=app.bsky.actor.profile&rkey=self", pdsURL, did)