spider_creater/backend/db/spider.go

package db

import (
	"container/list"
	"encoding/json"
	"fmt"
	"log"
	"os"
	"sort"
	be "spider_creator/backend"
	"strconv"
	"strings"

	"github.com/bmaupin/go-epub"

	"github.com/boltdb/bolt"
	"github.com/xuri/excelize/v2"
)

// Load
func (s *SpiderDb) Load(code string) *be.SpiderConfig {
	var req *be.SpiderConfig = new(be.SpiderConfig)
	err := s.db.View(func(tx *bolt.Tx) error {
		bucket := tx.Bucket([]byte("myBucket"))
		value := bucket.Get([]byte(code))
		if value != nil && len(value) > 0 {
			_ = json.Unmarshal(value, req)
		}
		return nil
	})
	if err != nil {
		log.Fatal(err)
	}
	return req
}

// SaveOrUpdate
func (s *SpiderDb) SaveOrUpdate(sc *be.SpiderConfig) {
	//加载原始数据
	var sc1 *be.SpiderConfig = new(be.SpiderConfig)
	var sc2 *be.SpiderConfig
	err := s.db.View(func(tx *bolt.Tx) error {
		bucket := tx.Bucket([]byte("myBucket"))
		value := bucket.Get([]byte(sc.Code))
		if value != nil && len(value) > 0 {
			_ = json.Unmarshal(value, sc1)
		}
		return nil
	})
	if err != nil {
		log.Println(err.Error())
		return
	}
	//更新
	if sc1 != nil {
		sc2 = be.MergeSpiderConfig(sc1, sc)
		value, _ := json.Marshal(sc2)
		err = s.db.Update(func(tx *bolt.Tx) error {
			bucket := tx.Bucket([]byte("myBucket"))
			err := bucket.Put([]byte(sc.Code), value)
			return err
		})
		if err != nil {
			log.Println(err.Error())
			return
		}
	}
}

// LoadAll,默认按照代码排序
func (s *SpiderDb) LoadSpiderConfigAll() be.SpiderConfiges {
	ret := make(be.SpiderConfiges, 0)
	// 开始读取事务
	err := s.db.View(func(tx *bolt.Tx) error {
		// 遍历数据库中的所有桶
		bucket := tx.Bucket([]byte("myBucket"))
		// 遍历桶中的所有键/值对
		return bucket.ForEach(func(k, v []byte) error {
			var sf *be.SpiderConfig = new(be.SpiderConfig)
			json.Unmarshal(v, sf)
			if sf != nil {
				ret = append(ret, sf)
			}
			return nil
		})
	})
	sort.Sort(ret)
	if err != nil {
		log.Println(err.Error())
	}
	return ret
}

// Delete
func (s *SpiderDb) DeleteSpiderConfig(code string) {
	err := s.db.Update(func(tx *bolt.Tx) error {
		bucket := tx.Bucket([]byte("myBucket"))
		err := bucket.Delete([]byte(code))
		return err
	})
	if err != nil {
		log.Println(err.Error())
		return
	}
}

// 批量导入
func (s *SpiderDb) BatchImport(filepath string) error {
	f, err := excelize.OpenFile(filepath)
	if err != nil {
		return err
	}
	defer f.Close()
	for _, sheetName := range f.GetSheetList() {
		// 获取工作表的所有行
		rows, err := f.GetRows(sheetName)
		if err != nil {
			continue
		}
		//
		for index, row := range rows {
			if index == 0 || len(row) < 5 || row[0] == "" || row[3] == "" {
				continue
			}
			sc := &be.SpiderConfig{
				Code:       row[0],
				Site:       row[1],
				Channel:    row[2],
				Href:       row[3],
				ModifyUser: row[4],
			}
			value, _ := json.Marshal(sc)
			err = s.db.Update(func(tx *bolt.Tx) error {
				bucket := tx.Bucket([]byte("myBucket"))
				err := bucket.Put([]byte(sc.Code), value)
				return err
			})
			if err != nil {
				continue
			}
		}

	}

	return nil
}

// ExportEpubFile 导出epub文件
func (db *SpiderDb) ExportEpubFile(bookname, filepath string,
	currentResult *list.List) error {
	output := epub.NewEpub(bookname)
	output.SetTitle(bookname)
	output.SetDescription(bookname)
	output.SetAuthor("unknow")
	i := 1
	for el := currentResult.Front(); el != nil; el = el.Next() {
		art, _ := el.Value.(*be.ResultItem)
		body := "<h2>" + art.Title + "</h2><p>" + strings.Join(strings.Split(art.Content, "\n"), "</p><p>") + "</p>"
		output.AddSection(body, art.Title, fmt.Sprintf("%06d.xhtml", i+1), "")
		i += 1
	}
	fo, err := os.Create(filepath)
	if err != nil {
		db.enf.Dispatch("debug_event", err.Error())
	}
	output.WriteTo(fo)
	fo.Close()
	return nil
}

// ExportExcelFile数据集导出到excel文件中
func (db *SpiderDb) ExportExcelFile(filepath, site, channel string,
	currentResult *list.List) error {
	f := excelize.NewFile()
	defer f.Close()
	f.SetCellStr("Sheet1", "A1", "站点")
	f.SetCellStr("Sheet1", "B1", "栏目")
	//写入数据
	f.SetCellStr("Sheet1", "C1", "标题")
	f.SetCellStr("Sheet1", "D1", "链接")
	f.SetCellStr("Sheet1", "E1", "发布单位")
	f.SetCellStr("Sheet1", "F1", "发布时间")
	f.SetCellStr("Sheet1", "G1", "正文")
	f.SetCellStr("Sheet1", "H1", "附件")
	i := 0
	for el := currentResult.Front(); el != nil; el = el.Next() {
		r, _ := el.Value.(*be.ResultItem)
		//写入站点信息
		iStr := strconv.Itoa(i + 2)
		f.SetCellStr("Sheet1", "A"+iStr, site)
		f.SetCellStr("Sheet1", "B"+iStr, channel)
		//写入数据
		f.SetCellStr("Sheet1", "C"+iStr, r.Title)
		f.SetCellStr("Sheet1", "D"+iStr, r.Href)
		f.SetCellStr("Sheet1", "E"+iStr, r.PublishUnit)
		f.SetCellStr("Sheet1", "F"+iStr, r.ListPubTime)
		f.SetCellStr("Sheet1", "G"+iStr, r.Content)
		f.SetCellStr("Sheet1", "H"+iStr, "")
		if len(r.AttachLinks) > 0 {
			bs, err := json.Marshal(r.AttachLinks)
			if err == nil {
				f.SetCellStr("Sheet1", "H"+iStr, string(bs))
			}
		}
		i += 1
	}
	err := f.SaveAs(filepath)
	if err != nil {
		return err
	}
	return nil
}