fix(ui): сохранять вкладку и фильтры Ping в URL

lib/data-filters/uptime-url-state.test.ts

@@ -0,0 +1,17 @@
+import assert from "node:assert/strict"
+import test from "node:test"
+import { readUptimeUrl, patchUptimeUrl } from "./uptime-url-state"
+
+test("вкладка и фильтры Ping восстанавливаются из ссылки", () => {
+  const state = readUptimeUrl(new URLSearchParams({ tab: "speed", q: "узел", status: "down", servers: '["1","x/2"]' }))
+  assert.deepEqual(state, { tab: "speed", search: "узел", status: "down", servers: ["1", "x/2"], error: null })
+})
+test("некорректные и повторяющиеся параметры дают ошибку", () => {
+  for (const raw of ['tab=unknown', 'status=online', 'q=a&q=b', 'servers={}', 'servers=[1]', 'servers=["1","1"]', 'servers=[""]']) {
+    assert.ok(readUptimeUrl(new URLSearchParams(raw)).error, raw)
+  }
+})
+test("сброс оставляет пробу, вкладку и чужие параметры", () => {
+  const result = patchUptimeUrl(new URLSearchParams('probe=p%2F2&keep=1&tab=speed&q=a&status=down&servers=%5B%221%22%5D'), { q: null, status: null, servers: null })
+  assert.equal(result, '/uptime?probe=p%2F2&keep=1&tab=speed')
+})

lib/data-filters/uptime-url-state.ts

@@ -0,0 +1,37 @@
+import type { Dispatch, SetStateAction } from "react"
+
+export type UptimeTab = "probes" | "resources" | "speed"
+export type ProbeStatusFilter = "all" | "up" | "warn" | "down"
+export function readUptimeUrl(params: URLSearchParams) {
+  const rawTab = params.get("tab")
+  const rawStatus = params.get("status")
+  const search = params.get("q") ?? ""
+  const tab: UptimeTab = rawTab === "resources" || rawTab === "speed" ? rawTab : "probes"
+  const status: ProbeStatusFilter = rawStatus === "up" || rawStatus === "warn" || rawStatus === "down" ? rawStatus : "all"
+  let error: string | null = null
+  let servers: string[] = []
+  if ((rawTab !== null && !["probes", "resources", "speed"].includes(rawTab)) ||
+      (rawStatus !== null && !["up", "warn", "down"].includes(rawStatus)) ||
+      ["tab", "q", "status", "servers"].some(key => params.getAll(key).length > 1)) error = "В ссылке указаны неверные или повторяющиеся параметры мониторинга."
+  const rawServers = params.get("servers")
+  if (rawServers !== null) {
+    try {
+      if (rawServers.length > 8192) throw new Error()
+      const value: unknown = JSON.parse(rawServers)
+      if (!Array.isArray(value) || value.length > 50 || !value.every(id => typeof id === "string" && id.length > 0 && id.length <= 128) || new Set(value).size !== value.length) throw new Error()
+      servers = value
+    } catch { error = "Не удалось прочитать выбранные серверы из ссылки." }
+  }
+  return { tab, search, status, servers, error }
+}
+
+export function patchUptimeUrl(params: URLSearchParams, changes: Record<string, string | null>) {
+  const next = new URLSearchParams(params)
+  for (const [key, value] of Object.entries(changes)) {
+    if (value === null || value === "") next.delete(key)
+    else next.set(key, value)
+  }
+  return "/uptime" + (next.size ? "?" + next.toString() : "")
+}
+
+export type UrlSetter<T> = Dispatch<SetStateAction<T>>