feat: added GetSpecifiedUserSourceLink fucntion

internal/user.go

@@ -149,6 +149,67 @@ func GetUserSourceLink(ctx context.Context, driver neo4j.DriverWithContext, anth
 	return userSource, nil
 }
 
+func GetSpecifiedUserSourceLink(ctx context.Context, driver neo4j.DriverWithContext, anthroveUserID models.AnthroveUserID, sourceDisplayName string) (map[string]models.AnthroveUserRelationship, error) {
+
+	userSource := make(map[string]models.AnthroveUserRelationship)
+
+	query := `
+		MATCH (user:User{user_id: $anthrove_user_id})-[r:HAS_ACCOUNT_AT]->(s:Source{display_name: $source_display_name})
+		RETURN toString(r.user_id) AS sourceUserID, toString(r.username) AS sourceUsername, s as source;
+	`
+	params := map[string]any{
+		"anthrove_user_id":    anthroveUserID,
+		"source_display_name": sourceDisplayName,
+	}
+
+	result, err := neo4j.ExecuteQuery(ctx, driver, query, params, neo4j.EagerResultTransformer)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(result.Records) == 0 {
+		return nil, fmt.Errorf("user has no relations with the source %s", sourceDisplayName)
+	}
+
+	for i := range result.Records {
+		record := result.Records[i]
+		source, _, err := neo4j.GetRecordValue[neo4j.Node](record, "source")
+		if err != nil {
+			return nil, err
+		}
+		sourceUserID, _, err := neo4j.GetRecordValue[string](record, "sourceUserID")
+		if err != nil {
+			return nil, err
+		}
+		sourceUsername, _, err := neo4j.GetRecordValue[string](record, "sourceUsername")
+		if err != nil {
+			return nil, err
+		}
+
+		displayName := source.Props["display_name"].(string)
+		domain := source.Props["domain"].(string)
+		icon := source.Props["icon"].(string)
+
+		anthroveSourceUser := models.AnthroveUserRelationship{
+			UserID:   sourceUserID,
+			Username: sourceUsername,
+			Source: models.AnthroveSource{
+				DisplayName: displayName,
+				Domain:      domain,
+				Icon:        icon,
+			},
+		}
+		userSource[displayName] = anthroveSourceUser
+	}
+
+	log.WithFields(log.Fields{
+		"anthrove_user_id": anthroveUserID,
+		"anthrove_data":    userSource,
+	}).Trace("graph: got user favorite count")
+
+	return userSource, nil
+}
+
 func GetAnthroveUser(ctx context.Context, driver neo4j.DriverWithContext, anthroveUserID models.AnthroveUserID) (*models.AnthroveUser, error) {
 	var err error
 	var anthroveUser models.AnthroveUser

pkg/graph/graph.go

@@ -86,6 +86,10 @@ type OtterSpace interface {
 	// It returns a map of source domains to user-source relationships, and an error if the operation fails.
 	GetUserSourceLinks(ctx context.Context, anthroveUserID models.AnthroveUserID) (map[string]models.AnthroveUserRelationship, error)
 
+	// GetUserSourceLinks retrieves the links between a user and sources in the OtterSpace graph.
+	// It returns a map of source domains to user-source relationships, and an error if the operation fails.
+	GetSpecifiedUserSourceLink(ctx context.Context, anthroveUserID models.AnthroveUserID, sourceDisplayName string) (map[string]models.AnthroveUserRelationship, error)
+
 	// GetAnthroveUser retrieves a user from the OtterSpace graph by their ID.
 	// It returns the user and an error if the operation fails.
 	GetAnthroveUser(ctx context.Context, anthroveUserID models.AnthroveUserID) (*models.AnthroveUser, error)

pkg/graph/impl.go

@@ -84,6 +84,10 @@ func (g *graphConnection) GetUserSourceLinks(ctx context.Context, anthroveUserID
 	return internal.GetUserSourceLink(ctx, g.driver, anthroveUserID)
 }
 
+func (g *graphConnection) GetSpecifiedUserSourceLink(ctx context.Context, anthroveUserID models.AnthroveUserID, sourceDisplayName string) (map[string]models.AnthroveUserRelationship, error) {
+	return internal.GetSpecifiedUserSourceLink(ctx, g.driver, anthroveUserID, sourceDisplayName)
+}
+
 func (g *graphConnection) GetAnthroveUser(ctx context.Context, anthroveUserID models.AnthroveUserID) (*models.AnthroveUser, error) {
 	return internal.GetAnthroveUser(ctx, g.driver, anthroveUserID)
 }