WAPC2 实现企微审批只读 POC

server/src/scripts/check-wecom-approval-poc.js

@@ -0,0 +1,507 @@
+#!/usr/bin/env node
+require("dotenv/config");
+
+const fs = require("node:fs");
+const path = require("node:path");
+
+const { getConfig } = require("../config");
+const {
+  APPROVAL_POC_TARGETS,
+  fetchWecomApprovalDetail,
+  fetchWecomApprovalTemplateDetail,
+  maskApprovalIdentifier,
+} = require("../services/integrations/wecomApproval");
+
+const DEFAULT_REPORT_ROOT = path.resolve(__dirname, "../../../artifacts/qa-flow");
+
+const REPORT_PRIVACY =
+  "approval type/counts/masked template and sp_no prefixes only; no phone/email/token/secret/full userid/full sp_no/form values/attachments/comments/raw payload";
+
+const TEMPLATE_ENV = Object.freeze({
+  leave: "WECOM_APPROVAL_LEAVE_TEMPLATE_ID",
+  missed_punch: "WECOM_APPROVAL_MISSED_PUNCH_TEMPLATE_ID",
+});
+
+const SP_NO_ENV = Object.freeze({
+  leave: "WECOM_APPROVAL_LEAVE_TEST_SP_NO",
+  missed_punch: "WECOM_APPROVAL_MISSED_PUNCH_TEST_SP_NO",
+});
+
+function printHelp() {
+  process.stdout.write(`Usage: node src/scripts/check-wecom-approval-poc.js [options]
+
+QA-only 企业微信审批模板与低风险 sp_no 只读 POC。
+默认不写 OA/企微资料，不接真实回调，不进入审批镜像。
+
+Options:
+  --live                         启用企微 live 只读检查。
+  --format=text|json             输出格式，默认 text。
+  --report-dir=<path>            报告目录，默认 artifacts/qa-flow/wecom-approval-poc-<timestamp>。
+  --template=leave:<id>          指定请假模板 ID。
+  --template=missed_punch:<id>   指定补卡模板 ID。
+  --sp-no=leave:<sp_no>          指定请假低风险测试审批单号。
+  --sp-no=missed_punch:<sp_no>   指定补卡低风险测试审批单号。
+  --help                         显示帮助。
+
+Secret 固定规则：
+  审批模板详情/审批详情：WECOM_AGENT_SECRET。
+  不使用 WECOM_CONTACT_SECRET、WECOM_CHECKIN_SECRET 或 WECOM_HR_ASSISTANT_SECRET 兜底。
+
+隐私边界：
+  报告只输出模板类型、计数、状态、脱敏模板 ID / sp_no 前缀和错误分类。
+  不输出手机号、邮箱、token、secret、完整 userid、完整 sp_no、表单值、附件、评论或企微原始 payload。
+`);
+}
+
+function timestamp() {
+  return new Date().toISOString().replace(/[-:]/g, "").replace(/\.\d{3}Z$/, "Z");
+}
+
+function toSafeString(value, maxLength = 500) {
+  if (value == null) return "";
+  return String(value).trim().slice(0, maxLength);
+}
+
+function safeMessage(value) {
+  return toSafeString(value, 500)
+    .replace(/access_token=[^&\s]+/gi, "access_token=***")
+    .replace(/[A-Za-z0-9_-]{24,}/g, "***")
+    .slice(0, 240);
+}
+
+function supportedTargetKeys() {
+  return APPROVAL_POC_TARGETS.map((item) => item.key);
+}
+
+function parseTargetPair(value, flagName) {
+  const raw = toSafeString(value, 500);
+  const separatorIndex = raw.indexOf(":");
+  if (separatorIndex <= 0) {
+    throw new Error(`${flagName} requires <target>:<value>`);
+  }
+  const target = raw.slice(0, separatorIndex).trim();
+  const itemValue = raw.slice(separatorIndex + 1).trim();
+  if (!supportedTargetKeys().includes(target)) {
+    throw new Error(`${flagName} unsupported target: ${target}`);
+  }
+  if (!itemValue) {
+    throw new Error(`${flagName} requires non-empty value`);
+  }
+  return { target, value: itemValue };
+}
+
+function parseArgs(argv) {
+  const options = {
+    live: process.env.WECOM_APPROVAL_POC_LIVE === "1",
+    format: "text",
+    reportDir: process.env.WECOM_APPROVAL_POC_REPORT_DIR
+      || path.join(DEFAULT_REPORT_ROOT, `wecom-approval-poc-${timestamp()}`),
+    templates: {},
+    spNos: {},
+    help: false,
+  };
+
+  for (let index = 0; index < argv.length; index += 1) {
+    const arg = argv[index];
+    if (arg === "--help" || arg === "-h") {
+      options.help = true;
+    } else if (arg === "--live") {
+      options.live = true;
+    } else if (arg === "--no-live") {
+      options.live = false;
+    } else if (arg === "--format") {
+      options.format = argv[index + 1] || options.format;
+      index += 1;
+    } else if (arg.startsWith("--format=")) {
+      options.format = arg.slice("--format=".length);
+    } else if (arg === "--report-dir") {
+      options.reportDir = argv[index + 1] || options.reportDir;
+      index += 1;
+    } else if (arg.startsWith("--report-dir=")) {
+      options.reportDir = arg.slice("--report-dir=".length);
+    } else if (arg === "--template") {
+      const pair = parseTargetPair(argv[index + 1], "--template");
+      options.templates[pair.target] = pair.value;
+      index += 1;
+    } else if (arg.startsWith("--template=")) {
+      const pair = parseTargetPair(arg.slice("--template=".length), "--template");
+      options.templates[pair.target] = pair.value;
+    } else if (arg === "--sp-no") {
+      const pair = parseTargetPair(argv[index + 1], "--sp-no");
+      options.spNos[pair.target] = pair.value;
+      index += 1;
+    } else if (arg.startsWith("--sp-no=")) {
+      const pair = parseTargetPair(arg.slice("--sp-no=".length), "--sp-no");
+      options.spNos[pair.target] = pair.value;
+    } else {
+      throw new Error(`Unsupported argument: ${arg}`);
+    }
+  }
+
+  if (!["text", "json"].includes(options.format)) {
+    throw new Error(`Unsupported --format: ${options.format}`);
+  }
+  return options;
+}
+
+function envValue(env, name) {
+  return toSafeString(env[name], 500);
+}
+
+function buildInputs(options, env = process.env) {
+  return APPROVAL_POC_TARGETS.map((target) => {
+    const cliTemplateId = toSafeString(options.templates[target.key], 500);
+    const cliSpNo = toSafeString(options.spNos[target.key], 500);
+    const envTemplateId = envValue(env, TEMPLATE_ENV[target.key]);
+    const envSpNo = envValue(env, SP_NO_ENV[target.key]);
+    const templateId = cliTemplateId || envTemplateId;
+    const spNo = cliSpNo || envSpNo;
+
+    return {
+      key: target.key,
+      label: target.label,
+      templateId,
+      templateIdPrefix: maskApprovalIdentifier(templateId),
+      templateSource: templateId ? (cliTemplateId ? "cli" : TEMPLATE_ENV[target.key]) : null,
+      templateMissingEnv: templateId ? [] : [TEMPLATE_ENV[target.key]],
+      spNo,
+      spNoPrefix: maskApprovalIdentifier(spNo),
+      spNoSource: spNo ? (cliSpNo ? "cli" : SP_NO_ENV[target.key]) : null,
+      spNoMissingEnv: spNo ? [] : [SP_NO_ENV[target.key]],
+    };
+  });
+}
+
+function buildSecretCheck(config) {
+  const missing = [];
+  if (!config.wecomCorpId) missing.push("WECOM_CORP_ID");
+  if (!config.wecomAgentSecret) missing.push("WECOM_AGENT_SECRET");
+  return {
+    id: "approval_secret_matrix",
+    source: "WECOM_AGENT_SECRET",
+    endpoints: [
+      "POST /cgi-bin/oa/gettemplatedetail",
+      "POST /cgi-bin/oa/getapprovaldetail",
+    ],
+    status: missing.length ? "BLOCKED" : "OK",
+    missing,
+    noFallback: [
+      "WECOM_CONTACT_SECRET",
+      "WECOM_CHECKIN_SECRET",
+      "WECOM_HR_ASSISTANT_SECRET",
+    ],
+  };
+}
+
+function summarizeApiResult(result) {
+  if (!result || typeof result !== "object") return null;
+  const summary = {};
+  for (const key of ["errcode", "errmsg", "fieldCount", "fieldTypeCounts", "spStatus", "applyFieldCount", "approvalNodeCount", "notifyerCount", "commentCount"]) {
+    if (result[key] != null) {
+      summary[key] = key === "errmsg" ? safeMessage(result[key]) : result[key];
+    }
+  }
+  return Object.keys(summary).length ? summary : null;
+}
+
+function buildMissingTemplateCheck(input) {
+  return {
+    id: "approval_template_detail",
+    target: input.key,
+    label: input.label,
+    endpoint: "POST /cgi-bin/oa/gettemplatedetail",
+    source: "WECOM_AGENT_SECRET",
+    status: "NEEDS_CONFIG",
+    missingEnv: input.templateMissingEnv,
+    templateIdPrefix: null,
+    summary: null,
+  };
+}
+
+function buildMissingApprovalCheck(input) {
+  return {
+    id: "approval_detail",
+    target: input.key,
+    label: input.label,
+    endpoint: "POST /cgi-bin/oa/getapprovaldetail",
+    source: "WECOM_AGENT_SECRET",
+    status: "NEEDS_CONFIG",
+    missingEnv: input.spNoMissingEnv,
+    spNoPrefix: null,
+    summary: null,
+  };
+}
+
+function buildDryRunTemplateCheck(input) {
+  return {
+    id: "approval_template_detail",
+    target: input.key,
+    label: input.label,
+    endpoint: "POST /cgi-bin/oa/gettemplatedetail",
+    source: "WECOM_AGENT_SECRET",
+    status: "DRY_RUN_READY",
+    templateIdPrefix: input.templateIdPrefix,
+    configuredFrom: input.templateSource,
+    summary: null,
+  };
+}
+
+function buildDryRunApprovalCheck(input) {
+  return {
+    id: "approval_detail",
+    target: input.key,
+    label: input.label,
+    endpoint: "POST /cgi-bin/oa/getapprovaldetail",
+    source: "WECOM_AGENT_SECRET",
+    status: "DRY_RUN_READY",
+    spNoPrefix: input.spNoPrefix,
+    configuredFrom: input.spNoSource,
+    summary: null,
+  };
+}
+
+function buildLiveTemplateCheck(input, result) {
+  return {
+    id: "approval_template_detail",
+    target: input.key,
+    label: input.label,
+    endpoint: "POST /cgi-bin/oa/gettemplatedetail",
+    source: result.tokenSource || "WECOM_AGENT_SECRET",
+    status: result.ok ? "OK" : "BLOCKED",
+    reason: result.ok ? null : result.code,
+    message: result.message ? safeMessage(result.message) : null,
+    templateIdPrefix: input.templateIdPrefix,
+    configuredFrom: input.templateSource,
+    summary: result.summary,
+    response: summarizeApiResult(result.response),
+  };
+}
+
+function buildLiveApprovalCheck(input, result) {
+  return {
+    id: "approval_detail",
+    target: input.key,
+    label: input.label,
+    endpoint: "POST /cgi-bin/oa/getapprovaldetail",
+    source: result.tokenSource || "WECOM_AGENT_SECRET",
+    status: result.ok ? "OK" : "BLOCKED",
+    reason: result.ok ? null : result.code,
+    message: result.message ? safeMessage(result.message) : null,
+    spNoPrefix: input.spNoPrefix,
+    configuredFrom: input.spNoSource,
+    summary: result.summary,
+    response: summarizeApiResult(result.response),
+  };
+}
+
+async function runTargetChecks({
+  config,
+  input,
+  options,
+  fetchTemplateDetailImpl = fetchWecomApprovalTemplateDetail,
+  fetchApprovalDetailImpl = fetchWecomApprovalDetail,
+}) {
+  let template = null;
+  let approval = null;
+
+  if (!input.templateId) {
+    template = buildMissingTemplateCheck(input);
+  } else if (!options.live) {
+    template = buildDryRunTemplateCheck(input);
+  } else {
+    template = buildLiveTemplateCheck(input, await fetchTemplateDetailImpl({
+      config,
+      templateId: input.templateId,
+    }));
+  }
+
+  if (!input.spNo) {
+    approval = buildMissingApprovalCheck(input);
+  } else if (!options.live) {
+    approval = buildDryRunApprovalCheck(input);
+  } else {
+    approval = buildLiveApprovalCheck(input, await fetchApprovalDetailImpl({
+      config,
+      spNo: input.spNo,
+    }));
+  }
+
+  return { target: input.key, label: input.label, template, approval };
+}
+
+function collectConfigGaps(targetChecks) {
+  const gaps = [];
+  for (const item of targetChecks) {
+    for (const check of [item.template, item.approval]) {
+      if (check?.status === "NEEDS_CONFIG") {
+        gaps.push({
+          id: check.id,
+          target: check.target,
+          status: check.status,
+          missingEnv: check.missingEnv || [],
+        });
+      }
+    }
+  }
+  return gaps;
+}
+
+function collectMainBlockers(secretCheck, targetChecks) {
+  const blockers = [];
+  if (secretCheck.status === "BLOCKED") {
+    blockers.push({
+      id: secretCheck.id,
+      reason: "missing_required_wecom_approval_config",
+      missing: secretCheck.missing,
+    });
+  }
+
+  for (const item of targetChecks) {
+    for (const check of [item.template, item.approval]) {
+      if (check?.status === "BLOCKED") {
+        blockers.push({
+          id: check.id,
+          target: check.target,
+          reason: check.reason || "wecom_approval_api_blocked",
+          missing: [],
+        });
+      }
+    }
+  }
+  return blockers;
+}
+
+function evaluateConclusion({ mainBlockers, configGaps, verificationGaps }) {
+  if (mainBlockers.length) {
+    return {
+      status: "SKIP",
+      conclusion: "BLOCKED_BY_EXTERNAL_CONFIG",
+    };
+  }
+  if (configGaps.length || verificationGaps.length) {
+    return {
+      status: "PARTIAL_APPROVAL_POC_NEEDS_CONFIG",
+      conclusion: "PARTIAL_APPROVAL_POC_NEEDS_CONFIG",
+    };
+  }
+  return {
+    status: "PASS_APPROVAL_POC",
+    conclusion: "PASS_APPROVAL_POC",
+  };
+}
+
+async function executeApprovalPoc(options, deps = {}) {
+  const env = deps.env || process.env;
+  const generatedAt = deps.generatedAt || new Date().toISOString();
+  const config = deps.config || getConfig();
+  const inputs = buildInputs(options, env);
+  const secretCheck = buildSecretCheck(config);
+  const targetChecks = [];
+
+  for (const input of inputs) {
+    targetChecks.push(await runTargetChecks({
+      config,
+      input,
+      options,
+      fetchTemplateDetailImpl: deps.fetchTemplateDetailImpl,
+      fetchApprovalDetailImpl: deps.fetchApprovalDetailImpl,
+    }));
+  }
+
+  const configGaps = collectConfigGaps(targetChecks);
+  const verificationGaps = options.live ? [] : [{
+    id: "live_read",
+    status: "DRY_RUN",
+    reason: "run_with_--live_for_public_readonly_gate",
+  }];
+  const mainBlockers = collectMainBlockers(secretCheck, targetChecks);
+  const conclusion = evaluateConclusion({ mainBlockers, configGaps, verificationGaps });
+
+  return {
+    mode: "qa_only",
+    generatedAt,
+    status: conclusion.status,
+    conclusion: conclusion.conclusion,
+    privacy: REPORT_PRIVACY,
+    scope: {
+      targets: APPROVAL_POC_TARGETS.map((item) => item.key),
+      writeBehavior: "no OA writes, no WeCom writes, no approval callbacks, no mirror import",
+      liveRead: Boolean(options.live),
+      deepMirror: "not_started",
+    },
+    inputs: {
+      templates: Object.fromEntries(inputs.map((item) => [item.key, {
+        configured: Boolean(item.templateId),
+        configuredFrom: item.templateSource,
+        templateIdPrefix: item.templateIdPrefix,
+      }])),
+      spNos: Object.fromEntries(inputs.map((item) => [item.key, {
+        configured: Boolean(item.spNo),
+        configuredFrom: item.spNoSource,
+        spNoPrefix: item.spNoPrefix,
+      }])),
+    },
+    checks: {
+      secretMatrix: secretCheck,
+      targets: targetChecks,
+    },
+    configGaps,
+    verificationGaps,
+    mainBlockers,
+  };
+}
+
+function ensureReportDir(reportDir) {
+  fs.mkdirSync(reportDir, { recursive: true });
+}
+
+function writeReport(reportDir, report) {
+  ensureReportDir(reportDir);
+  const filePath = path.join(reportDir, "summary.json");
+  fs.writeFileSync(filePath, `${JSON.stringify(report, null, 2)}\n`, "utf8");
+  return filePath;
+}
+
+function printText(report, reportPath) {
+  process.stdout.write(`[wecom-approval-poc] status=${report.status} conclusion=${report.conclusion}\n`);
+  process.stdout.write(`[wecom-approval-poc] report=${reportPath}\n`);
+  process.stdout.write(`[wecom-approval-poc] privacy=${report.privacy}\n`);
+  process.stdout.write(`[wecom-approval-poc] liveRead=${report.scope.liveRead} targets=${report.scope.targets.join(",")}\n`);
+  if (report.configGaps?.length) {
+    process.stdout.write(`[wecom-approval-poc] configGaps=${JSON.stringify(report.configGaps)}\n`);
+  }
+  if (report.mainBlockers?.length) {
+    process.stdout.write(`[wecom-approval-poc] mainBlockers=${JSON.stringify(report.mainBlockers)}\n`);
+  }
+}
+
+async function main() {
+  const options = parseArgs(process.argv.slice(2));
+  if (options.help) {
+    printHelp();
+    return;
+  }
+  const report = await executeApprovalPoc(options);
+  const reportPath = writeReport(options.reportDir, report);
+  if (options.format === "json") {
+    process.stdout.write(`${JSON.stringify({ ...report, reportPath }, null, 2)}\n`);
+  } else {
+    printText(report, reportPath);
+  }
+}
+
+if (require.main === module) {
+  main().catch((error) => {
+    process.stderr.write(`[wecom-approval-poc][FAIL] ${safeMessage(error?.message || error)}\n`);
+    process.exitCode = 1;
+  });
+}
+
+module.exports = {
+  buildInputs,
+  buildSecretCheck,
+  evaluateConclusion,
+  executeApprovalPoc,
+  parseArgs,
+  summarizeApiResult,
+};

server/src/services/integrations/wecomApproval.js

@@ -0,0 +1,345 @@
+const { getWecomAppAccessToken, sanitizeWecomResponse } = require("./wecomAccessToken");
+
+const WECOM_API_BASE = "https://qyapi.weixin.qq.com";
+
+const APPROVAL_POC_TARGETS = Object.freeze([
+  { key: "leave", label: "请假" },
+  { key: "missed_punch", label: "补卡" },
+]);
+
+class WecomApprovalPocError extends Error {
+  constructor(code, message, details = {}) {
+    super(message);
+    this.name = "WecomApprovalPocError";
+    this.code = code;
+    this.details = details;
+  }
+}
+
+function toSafeString(value, maxLength = 500) {
+  if (value == null) return "";
+  return String(value).trim().slice(0, maxLength);
+}
+
+function sanitizeErrorMessage(value) {
+  return toSafeString(value, 500)
+    .replace(/access_token=[^&\s]+/gi, "access_token=***")
+    .replace(/[A-Za-z0-9_-]{24,}/g, "***")
+    .slice(0, 240);
+}
+
+function maskApprovalIdentifier(value) {
+  const raw = toSafeString(value, 160);
+  if (!raw) return null;
+  if (raw.length <= 6) return `${raw.slice(0, 2)}***`;
+  return `${raw.slice(0, Math.min(8, raw.length))}***`;
+}
+
+function countBy(items, selector) {
+  const counts = {};
+  for (const item of items) {
+    const key = toSafeString(selector(item), 80) || "unknown";
+    counts[key] = (counts[key] || 0) + 1;
+  }
+  return counts;
+}
+
+function normalizeControls(value) {
+  if (!value) return [];
+  if (Array.isArray(value)) return value.filter((item) => item && typeof item === "object");
+  if (typeof value === "object") {
+    for (const key of ["controls", "contents", "items", "children"]) {
+      if (Array.isArray(value[key])) return normalizeControls(value[key]);
+    }
+  }
+  return [];
+}
+
+function controlType(control) {
+  if (!control || typeof control !== "object") return "unknown";
+  return (
+    control.control
+    || control.control_type
+    || control.controlType
+    || control.type
+    || control.property?.control
+    || control.property?.control_type
+    || control.property?.type
+    || "unknown"
+  );
+}
+
+function summarizeTemplatePayload(payload) {
+  const templateId = payload?.template_id ?? payload?.templateId;
+  const controls = normalizeControls(payload?.template_content?.controls)
+    .concat(normalizeControls(payload?.template_content?.contents))
+    .concat(normalizeControls(payload?.controls));
+  const dedupedControls = controls.length ? controls : normalizeControls(payload?.template_content);
+
+  return {
+    templateIdPrefix: maskApprovalIdentifier(templateId),
+    fieldCount: dedupedControls.length,
+    fieldTypeCounts: countBy(dedupedControls, controlType),
+    hasTemplateNames: Array.isArray(payload?.template_names) && payload.template_names.length > 0,
+  };
+}
+
+function summarizeApprovalPayload(payload) {
+  const info = payload?.info && typeof payload.info === "object" ? payload.info : {};
+  const applyData = info.apply_data && typeof info.apply_data === "object" ? info.apply_data : {};
+  const contents = Array.isArray(applyData.contents) ? applyData.contents : [];
+  const records = Array.isArray(info.sp_record) ? info.sp_record : [];
+  const notifyers = Array.isArray(info.notifyer) ? info.notifyer : [];
+  const comments = Array.isArray(info.comments) ? info.comments : [];
+
+  return {
+    spNoPrefix: maskApprovalIdentifier(info.sp_no ?? payload?.sp_no),
+    templateIdPrefix: maskApprovalIdentifier(info.template_id),
+    spStatus: info.sp_status == null ? null : toSafeString(info.sp_status, 40),
+    applyFieldCount: contents.length,
+    applyFieldTypeCounts: countBy(contents, controlType),
+    approvalNodeCount: records.length,
+    notifyerCount: notifyers.length,
+    commentCount: comments.length,
+  };
+}
+
+function sanitizeApprovalApiResponse(payload) {
+  if (!payload || typeof payload !== "object") return null;
+  const result = sanitizeWecomResponse(payload) ?? {};
+  if (payload.template_content) {
+    const summary = summarizeTemplatePayload(payload);
+    result.fieldCount = summary.fieldCount;
+    result.fieldTypeCounts = summary.fieldTypeCounts;
+  }
+  if (payload.info) {
+    const summary = summarizeApprovalPayload(payload);
+    result.spStatus = summary.spStatus;
+    result.applyFieldCount = summary.applyFieldCount;
+    result.approvalNodeCount = summary.approvalNodeCount;
+    result.notifyerCount = summary.notifyerCount;
+    result.commentCount = summary.commentCount;
+  }
+  return Object.keys(result).length ? result : null;
+}
+
+function classifyWecomApprovalResult(result, fallbackCode = "wecom_approval_api_error") {
+  if (result?.networkError) {
+    return {
+      code: result.errorMessage === "timeout" ? "wecom_approval_timeout" : "wecom_approval_network_error",
+      message: result.errorMessage || "WeCom approval API network error",
+      response: null,
+    };
+  }
+
+  const errcode = Number(result?.payload?.errcode);
+  if (Number.isFinite(errcode) && errcode !== 0) {
+    return {
+      code: "wecom_approval_api_error",
+      message: `WeCom approval API errcode ${errcode}`,
+      response: sanitizeApprovalApiResponse(result.payload),
+    };
+  }
+
+  return {
+    code: result?.httpStatus ? `wecom_approval_http_${result.httpStatus}` : fallbackCode,
+    message: "WeCom approval API failed",
+    response: sanitizeApprovalApiResponse(result?.payload),
+  };
+}
+
+async function fetchWecomApprovalJson(pathName, accessToken, body, options = {}) {
+  const url = new URL(`${WECOM_API_BASE}${pathName}`);
+  url.searchParams.set("access_token", accessToken);
+
+  const timeoutMs = Math.max(500, Number(options.timeoutMs ?? 10000));
+  const controller = new AbortController();
+  const timer = setTimeout(() => controller.abort(), timeoutMs);
+  try {
+    const response = await (options.fetchImpl ?? fetch)(url, {
+      method: "POST",
+      headers: { "Content-Type": "application/json" },
+      body: JSON.stringify(body ?? {}),
+      signal: controller.signal,
+    });
+    const payload = await response.json().catch(() => null);
+    const errcode = payload && typeof payload === "object" ? Number(payload.errcode) : NaN;
+    return {
+      ok: response.ok && Number.isFinite(errcode) && errcode === 0,
+      httpStatus: response.status,
+      payload,
+    };
+  } catch (error) {
+    return {
+      ok: false,
+      httpStatus: null,
+      payload: null,
+      networkError: true,
+      errorMessage: error?.name === "AbortError" ? "timeout" : sanitizeErrorMessage(error?.message ?? error),
+    };
+  } finally {
+    clearTimeout(timer);
+  }
+}
+
+async function getApprovalAccessToken({ config, fetchImpl, timeoutMs }) {
+  const tokenResult = await getWecomAppAccessToken({
+    config: {
+      ...config,
+      wecomRequireAgentId: false,
+    },
+    timeoutMs,
+    fetchImpl,
+  });
+
+  if (!tokenResult.ok) {
+    throw new WecomApprovalPocError(tokenResult.code, tokenResult.message || "WeCom app token unavailable", {
+      response: tokenResult.response,
+    });
+  }
+
+  return {
+    accessToken: tokenResult.accessToken,
+    tokenSource: "WECOM_AGENT_SECRET",
+    response: tokenResult.response,
+  };
+}
+
+async function fetchWecomApprovalTemplateDetail({
+  config,
+  templateId,
+  fetchImpl = fetch,
+  timeoutMs = config?.wecomRequestTimeoutMs ?? 10000,
+}) {
+  const resolvedTemplateId = toSafeString(templateId, 160);
+  if (!resolvedTemplateId) {
+    return {
+      ok: false,
+      skipped: true,
+      retryable: false,
+      code: "approval_template_id_missing",
+      message: "Missing approval template id",
+      tokenSource: "WECOM_AGENT_SECRET",
+      response: null,
+      summary: null,
+    };
+  }
+
+  try {
+    const token = await getApprovalAccessToken({ config, fetchImpl, timeoutMs });
+    const result = await fetchWecomApprovalJson("/cgi-bin/oa/gettemplatedetail", token.accessToken, {
+      template_id: resolvedTemplateId,
+    }, { fetchImpl, timeoutMs });
+
+    if (!result.ok) {
+      const error = classifyWecomApprovalResult(result, "wecom_approval_template_detail_failed");
+      return {
+        ok: false,
+        skipped: false,
+        retryable: false,
+        code: error.code,
+        message: error.message,
+        tokenSource: token.tokenSource,
+        response: error.response,
+        summary: null,
+      };
+    }
+
+    return {
+      ok: true,
+      skipped: false,
+      retryable: false,
+      code: "wecom_approval_template_detail_fetched",
+      message: null,
+      tokenSource: token.tokenSource,
+      response: sanitizeApprovalApiResponse(result.payload),
+      summary: summarizeTemplatePayload(result.payload),
+    };
+  } catch (error) {
+    return {
+      ok: false,
+      skipped: false,
+      retryable: Boolean(error?.details?.retryable),
+      code: error?.code || "wecom_approval_template_detail_failed",
+      message: sanitizeErrorMessage(error?.message || error),
+      tokenSource: "WECOM_AGENT_SECRET",
+      response: error?.details?.response || null,
+      summary: null,
+    };
+  }
+}
+
+async function fetchWecomApprovalDetail({
+  config,
+  spNo,
+  fetchImpl = fetch,
+  timeoutMs = config?.wecomRequestTimeoutMs ?? 10000,
+}) {
+  const resolvedSpNo = toSafeString(spNo, 160);
+  if (!resolvedSpNo) {
+    return {
+      ok: false,
+      skipped: true,
+      retryable: false,
+      code: "approval_sp_no_missing",
+      message: "Missing approval sp_no",
+      tokenSource: "WECOM_AGENT_SECRET",
+      response: null,
+      summary: null,
+    };
+  }
+
+  try {
+    const token = await getApprovalAccessToken({ config, fetchImpl, timeoutMs });
+    const result = await fetchWecomApprovalJson("/cgi-bin/oa/getapprovaldetail", token.accessToken, {
+      sp_no: resolvedSpNo,
+    }, { fetchImpl, timeoutMs });
+
+    if (!result.ok) {
+      const error = classifyWecomApprovalResult(result, "wecom_approval_detail_failed");
+      return {
+        ok: false,
+        skipped: false,
+        retryable: false,
+        code: error.code,
+        message: error.message,
+        tokenSource: token.tokenSource,
+        response: error.response,
+        summary: null,
+      };
+    }
+
+    return {
+      ok: true,
+      skipped: false,
+      retryable: false,
+      code: "wecom_approval_detail_fetched",
+      message: null,
+      tokenSource: token.tokenSource,
+      response: sanitizeApprovalApiResponse(result.payload),
+      summary: summarizeApprovalPayload(result.payload),
+    };
+  } catch (error) {
+    return {
+      ok: false,
+      skipped: false,
+      retryable: Boolean(error?.details?.retryable),
+      code: error?.code || "wecom_approval_detail_failed",
+      message: sanitizeErrorMessage(error?.message || error),
+      tokenSource: "WECOM_AGENT_SECRET",
+      response: error?.details?.response || null,
+      summary: null,
+    };
+  }
+}
+
+module.exports = {
+  APPROVAL_POC_TARGETS,
+  WecomApprovalPocError,
+  fetchWecomApprovalDetail,
+  fetchWecomApprovalTemplateDetail,
+  maskApprovalIdentifier,
+  sanitizeApprovalApiResponse,
+  summarizeApprovalPayload,
+  summarizeTemplatePayload,
+};