mjz update

vdoing/util/postData.js

@@ -0,0 +1,108 @@
+import { type, compareDate } from './index'
+
+/**
+ * 过滤非文章页
+ * @param {Array} posts 所有文章数据
+ */
+export function filterPosts (posts) {
+  posts = posts.filter(item => {
+    const { frontmatter: { pageComponent, article, home } } = item
+    return !(pageComponent || article === false || home === true) // 存在页面组件、article字段为false，以及首页
+  })
+  return posts
+}
+
+/**
+ * 按置顶和时间排序
+ * @param {Array} posts 过滤非文章页之后的文章数据
+ */
+export function sortPosts (posts) {
+  posts.sort((prev, next) => {
+    const prevSticky = prev.frontmatter.sticky
+    const nextSticky = next.frontmatter.sticky
+    if (prevSticky && nextSticky) {
+      return prevSticky == nextSticky ? compareDate(prev, next) : (prevSticky - nextSticky)
+    } else if (prevSticky && !nextSticky) {
+      return -1
+    } else if (!prevSticky && nextSticky) {
+      return 1
+    }
+    return compareDate(prev, next)
+  })
+  return posts
+}
+
+/**
+ * 按时间排序
+ * @param {Array} posts 过滤非文章页之后的文章数据
+ */
+export function sortPostsByDate (posts) {
+  posts.sort((prev, next) => {
+    return compareDate(prev, next)
+  })
+  return posts
+}
+
+/**
+ * 按分类和标签分组
+ * @param {Array} posts 按时间排序之后的文章数据
+ */
+export function groupPosts (posts) {
+  const categoriesObj = {}
+  const tagsObj = {}
+
+  for (let i = 0, postsL = posts.length; i < postsL; i++) {
+    const { frontmatter: { categories, tags } } = posts[i]
+    if (type(categories) === 'array') {
+      categories.forEach(item => {
+        if (item) { // 分类值是有效的
+          if (!categoriesObj[item]) {
+            categoriesObj[item] = []
+          }
+          categoriesObj[item].push(posts[i])
+        }
+      })
+    }
+    if (type(tags) === 'array') {
+      tags.forEach(item => {
+        if (item) { // 标签值是有效的
+          if (!tagsObj[item]) {
+            tagsObj[item] = []
+          }
+          tagsObj[item].push(posts[i])
+        }
+      })
+    }
+  }
+  return {
+    categories: categoriesObj,
+    tags: tagsObj
+  }
+}
+
+/**
+ * 获取所有分类和标签
+ * @param {Object} groupPosts 按分类和标签分组之后的文章数据
+ */
+export function categoriesAndTags (groupPosts) {
+  const categoriesArr = []
+  const tagsArr = []
+
+  for (let key in groupPosts.categories) {
+    categoriesArr.push({
+      key,
+      length: groupPosts.categories[key].length
+    })
+  }
+
+  for (let key in groupPosts.tags) {
+    tagsArr.push({
+      key,
+      length: groupPosts.tags[key].length
+    })
+  }
+  return {
+    categories: categoriesArr,
+    tags: tagsArr
+  }
+}