From b57f03381e4bccba2963cebabe51a9cf32bd96dd Mon Sep 17 00:00:00 2001
From: Sam Anthony <sam@samanthony.xyz>
Date: Thu, 7 May 2026 12:44:21 -0400
Subject: implement POST /validate-cover

---
 err.go | 28 +++++++++++++++++++++++++---
 1 file changed, 25 insertions(+), 3 deletions(-)

(limited to 'err.go')

diff --git a/err.go b/err.go
index e05d1ff..cb79500 100644
--- a/err.go
+++ b/err.go
@@ -6,6 +6,28 @@ import (
 	"net/http"
 )
 
+// pkgErr formats an error to be returned to the package user.
+func pkgErr(err error) error {
+	return fmt.Errorf("lulu: %w", err)
+}
+
+// pkgErrf formats an error with a message to be returned to the package user.
+func pkgErrf(err error, format string, a ...any) error {
+	return fmt.Errorf("lulu: %s: %w",
+		fmt.Sprintf(format, a...),
+		err)
+}
+
+type errEncReq struct {
+	payload any
+	path    string
+	error
+}
+
+func (e errEncReq) Error() string {
+	return fmt.Sprintf("error encoding request body %v for %s: %v", e.payload, e.path, e.error)
+}
+
 type errResp struct {
 	*http.Response
 }
@@ -14,7 +36,7 @@ func (e errResp) Error() string {
 	resp := e.Response
 	req := resp.Request
 	body, _ := io.ReadAll(resp.Body)
-	return fmt.Sprintf("lulu: %s %s: %s: %s", req.Method, req.URL, resp.Status, body)
+	return fmt.Sprintf("%s %s: %s: %s", req.Method, req.URL, resp.Status, body)
 }
 
 type errReadResp struct {
@@ -24,7 +46,7 @@ type errReadResp struct {
 
 func (e errReadResp) Error() string {
 	req := e.Response.Request
-	return fmt.Sprintf("lulu: %s %s: error reading response body: %v",
+	return fmt.Sprintf("%s %s: error reading response body: %v",
 		req.Method, req.URL, e.error)
 }
 
@@ -36,6 +58,6 @@ type errDecResp struct {
 
 func (e errDecResp) Error() string {
 	req := e.Response.Request
-	return fmt.Sprintf("lulu: %s %s: error decoding response body %q: %v",
+	return fmt.Sprintf("%s %s: error decoding response body %q: %v",
 		req.Method, req.URL, string(e.body), e.error)
 }
-- 
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