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| 1 | +// Copyright 2017 The StudyGolang Authors. All rights reserved. |
| 2 | +// Use of this source code is governed by a BSD-style |
| 3 | +// license that can be found in the LICENSE file. |
| 4 | +// http://studygolang.com |
| 5 | +// Author:polaris [email protected] |
| 6 | + |
| 7 | +package logic |
| 8 | + |
| 9 | +import ( |
| 10 | + . "db" |
| 11 | + "model" |
| 12 | + "time" |
| 13 | + |
| 14 | + "github.com/polaris1119/logger" |
| 15 | + "golang.org/x/net/context" |
| 16 | +) |
| 17 | + |
| 18 | +type GoBookLogic struct{} |
| 19 | + |
| 20 | +var DefaultGoBook = GoBookLogic{} |
| 21 | + |
| 22 | +// FindBy 获取图书列表(分页) |
| 23 | +func (GoBookLogic) FindBy(ctx context.Context, limit int, lastIds ...int) []*model.Book { |
| 24 | + objLog := GetLogger(ctx) |
| 25 | + |
| 26 | + dbSession := MasterDB.OrderBy("id DESC") |
| 27 | + |
| 28 | + if len(lastIds) > 0 && lastIds[0] > 0 { |
| 29 | + dbSession.And("id<?", lastIds[0]) |
| 30 | + } |
| 31 | + |
| 32 | + books := make([]*model.Book, 0) |
| 33 | + err := dbSession.OrderBy("id DESC").Limit(limit).Find(&books) |
| 34 | + if err != nil { |
| 35 | + objLog.Errorln("GoBookLogic FindBy Error:", err) |
| 36 | + return nil |
| 37 | + } |
| 38 | + |
| 39 | + return books |
| 40 | +} |
| 41 | + |
| 42 | +// FindByIds 获取多个图书详细信息 |
| 43 | +func (GoBookLogic) FindByIds(ids []int) []*model.Book { |
| 44 | + if len(ids) == 0 { |
| 45 | + return nil |
| 46 | + } |
| 47 | + books := make([]*model.Book, 0) |
| 48 | + err := MasterDB.In("id", ids).Find(&books) |
| 49 | + if err != nil { |
| 50 | + logger.Errorln("GoBookLogic FindByIds error:", err) |
| 51 | + return nil |
| 52 | + } |
| 53 | + return books |
| 54 | +} |
| 55 | + |
| 56 | +// FindById 获取一本图书信息 |
| 57 | +func (GoBookLogic) FindById(ctx context.Context, id string) (*model.Book, error) { |
| 58 | + book := &model.Book{} |
| 59 | + _, err := MasterDB.Id(id).Get(book) |
| 60 | + if err != nil { |
| 61 | + logger.Errorln("book logic FindById Error:", err) |
| 62 | + } |
| 63 | + |
| 64 | + return book, err |
| 65 | +} |
| 66 | + |
| 67 | +// 图书评论 |
| 68 | +type BookComment struct{} |
| 69 | + |
| 70 | +// UpdateComment 更新该图书的评论信息 |
| 71 | +// cid:评论id;objid:被评论对象id;uid:评论者;cmttime:评论时间 |
| 72 | +func (self BookComment) UpdateComment(cid, objid, uid int, cmttime time.Time) { |
| 73 | + // 更新评论数(TODO:暂时每次都更新表) |
| 74 | + _, err := MasterDB.Id(objid).Incr("cmtnum", 1).Update(new(model.Article)) |
| 75 | + if err != nil { |
| 76 | + logger.Errorln("更新图书评论数失败:", err) |
| 77 | + } |
| 78 | +} |
| 79 | + |
| 80 | +func (self BookComment) String() string { |
| 81 | + return "book" |
| 82 | +} |
| 83 | + |
| 84 | +// SetObjinfo 实现 CommentObjecter 接口 |
| 85 | +func (self BookComment) SetObjinfo(ids []int, commentMap map[int][]*model.Comment) { |
| 86 | + books := DefaultGoBook.FindByIds(ids) |
| 87 | + if len(books) == 0 { |
| 88 | + return |
| 89 | + } |
| 90 | + |
| 91 | + for _, book := range books { |
| 92 | + objinfo := make(map[string]interface{}) |
| 93 | + objinfo["name"] = book.Name |
| 94 | + objinfo["uri"] = model.PathUrlMap[model.TypeBook] |
| 95 | + objinfo["type_name"] = model.TypeNameMap[model.TypeBook] |
| 96 | + |
| 97 | + for _, comment := range commentMap[book.Id] { |
| 98 | + comment.Objinfo = objinfo |
| 99 | + } |
| 100 | + } |
| 101 | +} |
| 102 | + |
| 103 | +// 图书推荐 |
| 104 | +type BookLike struct{} |
| 105 | + |
| 106 | +// 更新该图书的推荐数 |
| 107 | +// objid:被喜欢对象id;num: 喜欢数(负数表示取消喜欢) |
| 108 | +func (self BookLike) UpdateLike(objid, num int) { |
| 109 | + // 更新喜欢数(TODO:暂时每次都更新表) |
| 110 | + _, err := MasterDB.Where("id=?", objid).Incr("likenum", num).Update(new(model.Book)) |
| 111 | + if err != nil { |
| 112 | + logger.Errorln("更新图书喜欢数失败:", err) |
| 113 | + } |
| 114 | +} |
| 115 | + |
| 116 | +func (self BookLike) String() string { |
| 117 | + return "book" |
| 118 | +} |
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