增加操作历史记录相关api

src/utils/auth.js

+/* eslint-disable no-param-reassign */
 /**
  * Created by yaohx_169 on 2017/6/8.
  */
 import { cookie } from './config';
 import { getCookie, setCookie, delCookie } from './helper';
+import db from './db';
 
 export async function getToken() {
   return getCookie(cookie.token);
@@ -57,3 +59,93 @@ export async function isAuthed() {
 export async function hasDomain() {
   return getDomain().then(result => !!result);
 }
+
+const normHistory = (history) => {
+  if (!history) {
+    history = {};
+  }
+  if (!history.size) {
+    history.size = 10;
+  }
+  if (history.size < 1) {
+    history.size = 1;
+  }
+  if (!history.data) {
+    history.data = [];
+    history.start = 0;
+    history.top = 0;
+    history.empty = true;
+  }
+  return history;
+};
+
+const next = (i, size) => {
+  if (i < 0 || i >= size) {
+    throw new Error(`out of range: ${i} in ${size}`);
+  }
+  if (i + 1 >= size) {
+    return 0;
+  } else {
+    return i + 1;
+  }
+};
+
+const prev = (i, size) => {
+  if (i < 0 || i >= size) {
+    throw new Error(`out of range: ${i} in ${size}`);
+  }
+  if (i - i < 0) {
+    return size - 1;
+  } else {
+    return i - 1;
+  }
+};
+
+export const histories = {
+  async getLatest(name) {
+    let history = await db.get(`history.${name}`).value();
+    history = normHistory(history);
+    if (history.empty) {
+      return null;
+    }
+    return history.data[prev(history.top, history.size)];
+  },
+  async getHistory(name) {
+    let history = db.get(`history.${name}`).value();
+    history = normHistory(history);
+    if (history.empty) {
+      return [];
+    } else if (history.top > history.start) {
+      return history.data.slice(history.start, history.top);
+    } else {
+      return [...history.data.slice(history.start, history.size), ...history.data.slice(0, history.top)];
+    }
+  },
+  async pushHistory(name, value) {
+    let history = await db.get(`history.${name}`).value();
+    history = normHistory(history);
+    history.data[history.top] = value;
+    const nextPos = next(history.top, history.size);
+    if (!history.empty && history.start === history.top) {
+      history.top = history.start = nextPos;
+    } else {
+      history.top = nextPos;
+    }
+    if (history.empty) {
+      history.empty = false;
+    }
+    return db.set(`history.${name}`, history).write();
+  },
+  async popHistory(name) {
+    let history = await db.get(`history.${name}`).value();
+    history = normHistory(history);
+    if (history.empty) {
+      return;
+    }
+    history.top = prev(history.top, history.size);
+    if (history.top === history.start) {
+      history.empty = true;
+    }
+    return db.set(`history.${name}`, history).write();
+  },
+};

src/utils/config.js

@@ -46,6 +46,7 @@ const config = {
   contextPath: _contextPath,
   apiContextPath: _apiContextPath,
   productId: 'big-machine-web-front',
+  fastNavigationPage: '',
   defaultDateFormat,
   defaultTimeFormat,
   defaultDateTimeFormat,

src/utils/db.js

+/** @module utils/db */
 import low from 'lowdb';
 import LocalStorage from 'lowdb/adapters/LocalStorage';
 
 const adapter = new LocalStorage('db');
-export default low(adapter);
+
+/**
+ * @typedef {Object} DB
+ * @template {T}
+ */
+
+/**
+ * @member {Function} DB~get
+ * @param {Array.<string>|string} path
+ * @param {*} [defaultValue]
+ * @return {DB.<*>}
+ */
+
+/**
+ * @member {Function} DB~set
+ * @template {T}
+ * @param {Array.<string>|string} path
+ * @param {T} value
+ * @return {DB.<T>}
+ */
+
+/**
+ * @member {Function} DB~find
+ * @template {T}
+ * @param {Function} [predicate=_.identity]
+ * @param {number} [fromIndex=0]
+ * @return {DB.<T>}
+ */
+
+/**
+ * @member {Function} DB~unset
+ * @param {Array.<string>|string} path
+ * @return {DB.<boolean>}
+ */
+
+/**
+ * @member {Function} DB~read
+ * @return {Promise.<*>}
+ */
+
+/**
+ * @member {Function} DB~write
+ * @return {Promise.<*>}
+ */
+
+/**
+ * @member {Function} DB~value
+ * @template {T}
+ * @return {Promise.<T>}
+ */
+
+/**
+ * @type {DB.<*>}
+ */
+const db = low(adapter);
+
+export default db;
+