feat: Add log query functionality and enhance logging system

routes/api/log.ts

@@ -0,0 +1,43 @@
+import { Handlers } from "$fresh/server.ts";
+import { return_data, return_error } from "../../server/utils.ts";
+import { User, UserPermission } from "../../db.ts";
+import { parse_int } from "../../server/parse_form.ts";
+import { base_logger, LogLevel } from "../../utils/logger.ts";
+
+export const handler: Handlers = {
+    async GET(req, ctx) {
+        const user = <User | undefined> ctx.state.user;
+        if (
+            user && !user.is_admin &&
+            !(Number(user.permissions) & UserPermission.QueryLog)
+        ) {
+            return return_error(403, "Permission denied.");
+        }
+        const u = new URL(req.url);
+        const params = u.searchParams;
+        const page = await parse_int(params.get("page"), null);
+        const limit = await parse_int(params.get("limit"), 50);
+        const offset = await parse_int(params.get("offset"), 0);
+        const type = params.get("type");
+        const min_level = await parse_int(
+            params.get("min_level"),
+            LogLevel.Log,
+        );
+        const allowed_level = params.get("allowed_level")?.split(",").map((x) =>
+            parseInt(x)
+        ).filter((x) => !isNaN(x));
+        const datas = page === null
+            ? base_logger.list(offset, limit, type, min_level, allowed_level)
+            : base_logger.list_page(
+                page,
+                limit,
+                type,
+                min_level,
+                allowed_level,
+            );
+        const count = page === null
+            ? undefined
+            : base_logger.count(type, min_level, allowed_level);
+        return return_data({ datas, count });
+    },
+};