Store a target's settings as columns (closes #543)

A target's settings move from the per-type JSON string in
targets.config to columns: url, headers, timeout_seconds,
forward_query, archive_expiry and archive_rotation. A column a type
does not use stays empty. headers holds the header map as JSON text
through GORM's JSON serializer, and archive_expiry holds a
time.Duration, 0 meaning never, so nothing that reads a target parses
it. The forms check each setting once, with the same refusals and
messages, and the edit form is filled from the columns, so the
per-type config structs, their parsers and the "could not be read"
branches are gone. A delivery task carries the six settings in place
of the JSON string.

Model: opus-5-5

internal/handlers/source_create_targets_test.go

@@ -7,6 +7,7 @@ import (
 	"net/http/httptest"
 	"net/url"
 	"testing"
+	"time"
 
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -54,15 +55,26 @@ func TestHandleSourceCreateSubmit_CreatesRequestedTargets(t *testing.T) {
 
 	env := setupSourceTest(t)
 
-	// Each value the archive pruning choice submits, after an empty
-	// one that stands for the archive checkbox left off.
-	expiries := []string{
-		"", "never", "1h", "12h", "24h", "720h", "2160h", "8760h",
+	// Each value the archive pruning choice submits and the expiry it
+	// stores, after an empty one that stands for the archive checkbox
+	// left off.
+	expiries := []struct {
+		value  string
+		stored time.Duration
+	}{
+		{"", 0},
+		{expiryNever, 0},
+		{"1h", time.Hour},
+		{"12h", 12 * time.Hour},
+		{"24h", 24 * time.Hour},
+		{"720h", 720 * time.Hour},
+		{"2160h", 2160 * time.Hour},
+		{"8760h", 8760 * time.Hour},
 	}
 
 	for _, httpURL := range []string{"", editOriginalURL} {
 		for _, expiry := range expiries {
-			name := "url=" + httpURL + " archive=" + expiry
+			name := "url=" + httpURL + " archive=" + expiry.value
 
 			t.Run(name, func(t *testing.T) {
 				t.Parallel()
@@ -72,9 +84,9 @@ func TestHandleSourceCreateSubmit_CreatesRequestedTargets(t *testing.T) {
 				form.Set("http_url", httpURL)
 				form.Set("archive_expiry", "720h")
 
-				if expiry != "" {
+				if expiry.value != "" {
 					form.Set("archive", "on")
-					form.Set("archive_expiry", expiry)
+					form.Set("archive_expiry", expiry.value)
 				}
 
 				w := submitCreateForm(env, form)
@@ -96,17 +108,16 @@ func TestHandleSourceCreateSubmit_CreatesRequestedTargets(t *testing.T) {
 					wantCount++
 
 					assert.Equal(t, "HTTP", byType[database.TargetTypeHTTP].Name)
-					assert.JSONEq(t, `{"url":"`+httpURL+`"}`,
-						byType[database.TargetTypeHTTP].Config)
+					assert.Equal(t, httpURL, byType[database.TargetTypeHTTP].URL)
 				}
 
-				if expiry != "" {
+				if expiry.value != "" {
 					wantCount++
 
 					assert.Equal(t, "Archive",
 						byType[database.TargetTypeDatabase].Name)
-					assert.JSONEq(t, `{"expiry":"`+expiry+`"}`,
-						byType[database.TargetTypeDatabase].Config)
+					assert.Equal(t, expiry.stored,
+						byType[database.TargetTypeDatabase].ArchiveExpiry)
 				}
 
 				assert.Len(t, byType, wantCount)