Add manage page for viewing the main log (non-access)

pkg/manage/actionsAdminPerm.go

@@ -5,8 +5,10 @@ import (
 	"database/sql"
 	"errors"
 	"fmt"
+	"io"
 	"net/http"
 	"os"
+	"path"
 	"strconv"
 
 	"github.com/gochan-org/gochan/pkg/building"
@@ -628,6 +630,32 @@ func registerAdminPages() {
 				}
 				infoEv.Send()
 				return managePageBuffer.String(), err
-			}},
+			},
+		},
+		Action{
+			ID:          "viewlog",
+			Title:       "View log",
+			Permissions: AdminPerms,
+			Callback: func(writer http.ResponseWriter, request *http.Request, staff *gcsql.Staff, wantsJSON bool, infoEv *zerolog.Event,
+				errEv *zerolog.Event) (output interface{}, err error) {
+				logPath := path.Join(config.GetSystemCriticalConfig().LogDir, "gochan.log")
+				logFile, err := os.Open(logPath)
+				if err != nil {
+					errEv.Err(err).Caller().Send()
+					return "", errors.New("unable to open log file")
+				}
+				defer logFile.Close()
+				ba, err := io.ReadAll(logFile)
+				if err != nil {
+					errEv.Err(err).Caller().Send()
+					return "", err
+				}
+				buf := bytes.NewBufferString("")
+				err = serverutil.MinifyTemplate(gctemplates.ManageViewLog, map[string]interface{}{
+					"logText": string(ba),
+				}, buf, "text/html")
+				return buf.String(), err
+			},
+		},
 	)
 }