lib/models/category.ts
import warehouse from 'warehouse';
import { slugize, full_url_for } from 'hexo-util';
import type Hexo from '../hexo';
export = (ctx: Hexo) => {
const Category = new warehouse.Schema({
name: {type: String, required: true},
parent: { type: warehouse.Schema.Types.CUID, ref: 'Category'}
});
Category.virtual('slug').get(function() {
let name = this.name;
if (!name) return;
let str = '';
if (this.parent) {
const parent = ctx.model('Category').findById(this.parent);
str += `${parent.slug}/`;
}
const map = ctx.config.category_map || {};
name = map[name] || name;
str += slugize(name, {transform: ctx.config.filename_case});
return str;
});
Category.virtual('path').get(function() {
let catDir = ctx.config.category_dir;
if (catDir === '/') catDir = '';
if (!catDir.endsWith('/')) catDir += '/';
return `${catDir + this.slug}/`;
});
Category.virtual('permalink').get(function() {
return full_url_for.call(ctx, this.path);
});
Category.virtual('posts').get(function() {
const PostCategory = ctx.model('PostCategory');
const ids = PostCategory.find({category_id: this._id}).map(item => item.post_id);
return ctx.locals.get('posts').find({
_id: {$in: ids}
});
});
Category.virtual('length').get(function() {
const PostCategory = ctx.model('PostCategory');
return PostCategory.find({category_id: this._id}).length;
});
// Check whether a category exists
Category.pre('save', data => {
const { name, parent } = data;
if (!name) return;
const Category = ctx.model('Category');
const cat = Category.findOne({
name,
parent: parent || {$exists: false}
}, {lean: true});
if (cat) {
throw new Error(`Category \`${name}\` has already existed!`);
}
});
// Remove PostCategory references
Category.pre('remove', data => {
const PostCategory = ctx.model('PostCategory');
return PostCategory.remove({category_id: data._id});
});
return Category;
};