// SiYuan - Build Your Eternal Digital Garden
// Copyright (c) 2020-present, b3log.org
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

package model

import (
	"errors"
	"fmt"
	"math"
	"os"
	"path"
	"path/filepath"
	"sort"
	"strconv"
	"strings"
	"time"
	"unicode/utf8"

	"github.com/88250/gulu"
	"github.com/88250/lute/ast"
	"github.com/88250/lute/html"
	"github.com/88250/lute/parse"
	util2 "github.com/88250/lute/util"
	"github.com/dustin/go-humanize"
	"github.com/facette/natsort"
	"github.com/gin-gonic/gin"
	"github.com/siyuan-note/filelock"
	"github.com/siyuan-note/logging"
	"github.com/siyuan-note/siyuan/kernel/cache"
	"github.com/siyuan-note/siyuan/kernel/filesys"
	"github.com/siyuan-note/siyuan/kernel/search"
	"github.com/siyuan-note/siyuan/kernel/sql"
	"github.com/siyuan-note/siyuan/kernel/treenode"
	"github.com/siyuan-note/siyuan/kernel/util"
)

type File struct {
	Path         string `json:"path"`
	Name         string `json:"name"`
	Icon         string `json:"icon"`
	Name1        string `json:"name1"`
	Alias        string `json:"alias"`
	Memo         string `json:"memo"`
	Bookmark     string `json:"bookmark"`
	ID           string `json:"id"`
	Count        int    `json:"count"`
	Size         uint64 `json:"size"`
	HSize        string `json:"hSize"`
	Mtime        int64  `json:"mtime"`
	CTime        int64  `json:"ctime"`
	HMtime       string `json:"hMtime"`
	HCtime       string `json:"hCtime"`
	Sort         int    `json:"sort"`
	SubFileCount int    `json:"subFileCount"`
}

func (box *Box) docFromFileInfo(fileInfo *FileInfo, ial map[string]string) (ret *File) {
	ret = &File{}
	ret.Path = fileInfo.path
	ret.Size = uint64(fileInfo.size)
	ret.Name = ial["title"] + ".sy"
	ret.Icon = ial["icon"]
	ret.ID = ial["id"]
	ret.Name1 = ial["name"]
	ret.Alias = ial["alias"]
	ret.Memo = ial["memo"]
	ret.Bookmark = ial["bookmark"]
	t, _ := time.ParseInLocation("20060102150405", ret.ID[:14], time.Local)
	ret.CTime = t.Unix()
	ret.HCtime = t.Format("2006-01-02 15:04:05")
	ret.HSize = humanize.Bytes(ret.Size)

	mTime := t
	if updated := ial["updated"]; "" != updated {
		if updatedTime, err := time.ParseInLocation("20060102150405", updated, time.Local); nil == err {
			mTime = updatedTime
		}
	}

	ret.Mtime = mTime.Unix()
	ret.HMtime = HumanizeTime(mTime)
	return
}

func HumanizeTime(then time.Time) string {
	labels := timeLangs[Conf.Lang]

	defaultMagnitudes := []humanize.RelTimeMagnitude{
		{time.Second, labels["now"].(string), time.Second},
		{2 * time.Second, labels["1s"].(string), 1},
		{time.Minute, labels["xs"].(string), time.Second},
		{2 * time.Minute, labels["1m"].(string), 1},
		{time.Hour, labels["xm"].(string), time.Minute},
		{2 * time.Hour, labels["1h"].(string), 1},
		{humanize.Day, labels["xh"].(string), time.Hour},
		{2 * humanize.Day, labels["1d"].(string), 1},
		{humanize.Week, labels["xd"].(string), humanize.Day},
		{2 * humanize.Week, labels["1w"].(string), 1},
		{humanize.Month, labels["xw"].(string), humanize.Week},
		{2 * humanize.Month, labels["1M"].(string), 1},
		{humanize.Year, labels["xM"].(string), humanize.Month},
		{18 * humanize.Month, labels["1y"].(string), 1},
		{2 * humanize.Year, labels["2y"].(string), 1},
		{humanize.LongTime, labels["xy"].(string), humanize.Year},
		{math.MaxInt64, labels["max"].(string), 1},
	}
	return humanize.CustomRelTime(then, time.Now(), labels["albl"].(string), labels["blbl"].(string), defaultMagnitudes)
}

func (box *Box) docIAL(p string) (ret map[string]string) {
	name := strings.ToLower(filepath.Base(p))
	if !strings.HasSuffix(name, ".sy") {
		return nil
	}

	ret = cache.GetDocIAL(p)
	if nil != ret {
		return ret
	}

	filePath := filepath.Join(util.DataDir, box.ID, p)

	data, err := filelock.ReadFile(filePath)
	if util.IsCorruptedSYData(data) {
		box.moveCorruptedData(filePath)
		return nil
	}
	if nil != err {
		logging.LogErrorf("read file [%s] failed: %s", p, err)
		return nil
	}
	ret = readDocIAL(data)
	if nil == ret {
		logging.LogWarnf("tree [%s] is corrupted", filePath)
		box.moveCorruptedData(filePath)
		return nil
	}
	cache.PutDocIAL(p, ret)
	return ret
}

func (box *Box) moveCorruptedData(filePath string) {
	base := filepath.Base(filePath)
	to := filepath.Join(util.WorkspaceDir, "corrupted", time.Now().Format("2006-01-02-150405"), box.ID, base)
	if copyErr := filelock.Copy(filePath, to); nil != copyErr {
		logging.LogErrorf("copy corrupted data file [%s] failed: %s", filePath, copyErr)
		return
	}
	if removeErr := filelock.Remove(filePath); nil != removeErr {
		logging.LogErrorf("remove corrupted data file [%s] failed: %s", filePath, removeErr)
		return
	}
	logging.LogWarnf("moved corrupted data file [%s] to [%s]", filePath, to)
}

func readDocIAL(data []byte) (ret map[string]string) {
	doc := map[string]interface{}{}
	if err := gulu.JSON.UnmarshalJSON(data, &doc); nil != err {
		logging.LogErrorf("unmarshal data failed: %s", err)
		return nil
	}

	propsArg := doc["Properties"]
	if nil == propsArg {
		return nil
	}

	props := propsArg.(map[string]interface{})
	ret = map[string]string{}
	for k, v := range props {
		ret[k] = v.(string)
	}
	return
}

func SearchDocsByKeyword(keyword string) (ret []map[string]string) {
	ret = []map[string]string{}

	openedBoxes := Conf.GetOpenedBoxes()
	boxes := map[string]*Box{}
	for _, box := range openedBoxes {
		boxes[box.ID] = box
	}

	var rootBlocks []*sql.Block
	if "" != keyword {
		for _, box := range boxes {
			if strings.Contains(box.Name, keyword) {
				ret = append(ret, map[string]string{"path": "/", "hPath": box.Name + "/", "box": box.ID, "boxIcon": box.Icon})
			}
		}

		condition := "hpath LIKE '%" + keyword + "%'"
		if "" != keyword {
			namCondition := Conf.Search.NAMFilter(keyword)
			if "" != namCondition {
				condition += " " + namCondition
			}
		}
		rootBlocks = sql.QueryRootBlockByCondition(condition)
	} else {
		for _, box := range boxes {
			ret = append(ret, map[string]string{"path": "/", "hPath": box.Name + "/", "box": box.ID, "boxIcon": box.Icon})
		}
	}

	for _, block := range rootBlocks {
		b := boxes[block.Box]
		if nil == b {
			continue
		}
		hPath := b.Name + block.HPath
		ret = append(ret, map[string]string{"path": block.Path, "hPath": hPath, "box": block.Box, "boxIcon": b.Icon})
	}

	sort.Slice(ret, func(i, j int) bool {
		return ret[i]["hPath"] < ret[j]["hPath"]
	})
	return
}

type FileInfo struct {
	path  string
	name  string
	size  int64
	isdir bool
}

func ListDocTree(boxID, path string, sortMode int) (ret []*File, totals int, err error) {
	ret = []*File{}

	box := Conf.Box(boxID)
	if nil == box {
		return nil, 0, errors.New(Conf.Language(0))
	}

	var files []*FileInfo
	start := time.Now()
	files, totals, err = box.Ls(path)
	if nil != err {
		return
	}
	elapsed := time.Now().Sub(start).Milliseconds()
	if 100 < elapsed {
		logging.LogWarnf("ls elapsed [%dms]", elapsed)
	}

	start = time.Now()
	boxLocalPath := filepath.Join(util.DataDir, box.ID)
	var docs []*File
	for _, file := range files {
		if file.isdir {
			if !util.IsIDPattern(file.name) {
				continue
			}

			parentDocPath := strings.TrimSuffix(file.path, "/") + ".sy"
			subDocFile := box.Stat(parentDocPath)
			if nil == subDocFile {
				continue
			}
			if ial := box.docIAL(parentDocPath); nil != ial {
				doc := box.docFromFileInfo(subDocFile, ial)
				subFiles, err := os.ReadDir(filepath.Join(boxLocalPath, file.path))
				if nil == err {
					for _, subFile := range subFiles {
						if strings.HasSuffix(subFile.Name(), ".sy") {
							doc.SubFileCount++
						}
					}
				}
				docs = append(docs, doc)
			}
			continue
		}

		subFolder := filepath.Join(boxLocalPath, strings.TrimSuffix(file.path, ".sy"))
		if gulu.File.IsDir(subFolder) {
			continue
		}

		if ial := box.docIAL(file.path); nil != ial {
			doc := box.docFromFileInfo(file, ial)
			docs = append(docs, doc)
			continue
		}
	}
	elapsed = time.Now().Sub(start).Milliseconds()
	if 500 < elapsed {
		logging.LogWarnf("build docs elapsed [%dms]", elapsed)
	}

	start = time.Now()
	refCount := sql.QueryRootBlockRefCount()
	for _, doc := range docs {
		if count := refCount[doc.ID]; 0 < count {
			doc.Count = count
		}
	}
	elapsed = time.Now().Sub(start).Milliseconds()
	if 500 < elapsed {
		logging.LogWarnf("query root block ref count elapsed [%dms]", elapsed)
	}

	start = time.Now()
	switch sortMode {
	case util.SortModeNameASC:
		sort.Slice(docs, func(i, j int) bool {
			return util.PinYinCompare(util.RemoveEmoji(docs[i].Name), util.RemoveEmoji(docs[j].Name))
		})
	case util.SortModeNameDESC:
		sort.Slice(docs, func(i, j int) bool {
			return util.PinYinCompare(util.RemoveEmoji(docs[j].Name), util.RemoveEmoji(docs[i].Name))
		})
	case util.SortModeUpdatedASC:
		sort.Slice(docs, func(i, j int) bool { return docs[i].Mtime < docs[j].Mtime })
	case util.SortModeUpdatedDESC:
		sort.Slice(docs, func(i, j int) bool { return docs[i].Mtime > docs[j].Mtime })
	case util.SortModeAlphanumASC:
		sort.Slice(docs, func(i, j int) bool {
			return natsort.Compare(util.RemoveEmoji(docs[i].Name), util.RemoveEmoji(docs[j].Name))
		})
	case util.SortModeAlphanumDESC:
		sort.Slice(docs, func(i, j int) bool {
			return natsort.Compare(util.RemoveEmoji(docs[j].Name), util.RemoveEmoji(docs[i].Name))
		})
	case util.SortModeCustom:
		fileTreeFiles := docs
		box.fillSort(&fileTreeFiles)
		sort.Slice(fileTreeFiles, func(i, j int) bool {
			if fileTreeFiles[i].Sort == fileTreeFiles[j].Sort {
				return util.TimeFromID(fileTreeFiles[i].ID) > util.TimeFromID(fileTreeFiles[j].ID)
			}
			return fileTreeFiles[i].Sort < fileTreeFiles[j].Sort
		})
		ret = append(ret, fileTreeFiles...)
		if Conf.FileTree.MaxListCount < len(ret) {
			ret = ret[:Conf.FileTree.MaxListCount]
		}
		ret = ret[:]
		return
	case util.SortModeRefCountASC:
		sort.Slice(docs, func(i, j int) bool { return docs[i].Count < docs[j].Count })
	case util.SortModeRefCountDESC:
		sort.Slice(docs, func(i, j int) bool { return docs[i].Count > docs[j].Count })
	case util.SortModeCreatedASC:
		sort.Slice(docs, func(i, j int) bool { return docs[i].CTime < docs[j].CTime })
	case util.SortModeCreatedDESC:
		sort.Slice(docs, func(i, j int) bool { return docs[i].CTime > docs[j].CTime })
	case util.SortModeSizeASC:
		sort.Slice(docs, func(i, j int) bool { return docs[i].Size < docs[j].Size })
	case util.SortModeSizeDESC:
		sort.Slice(docs, func(i, j int) bool { return docs[i].Size > docs[j].Size })
	case util.SortModeSubDocCountASC:
		sort.Slice(docs, func(i, j int) bool { return docs[i].SubFileCount < docs[j].SubFileCount })
	case util.SortModeSubDocCountDESC:
		sort.Slice(docs, func(i, j int) bool { return docs[i].SubFileCount > docs[j].SubFileCount })
	}

	if util.SortModeCustom != sortMode {
		ret = append(ret, docs...)
	}

	if Conf.FileTree.MaxListCount < len(ret) {
		ret = ret[:Conf.FileTree.MaxListCount]
	}
	ret = ret[:]

	elapsed = time.Now().Sub(start).Milliseconds()
	if 200 < elapsed {
		logging.LogInfof("sort docs elapsed [%dms]", elapsed)
	}
	return
}

func ContentStat(content string) (ret *util.BlockStatResult) {
	luteEngine := NewLute()
	tree := luteEngine.BlockDOM2Tree(content)
	runeCnt, wordCnt, linkCnt, imgCnt, refCnt := tree.Root.Stat()
	return &util.BlockStatResult{
		RuneCount:  runeCnt,
		WordCount:  wordCnt,
		LinkCount:  linkCnt,
		ImageCount: imgCnt,
		RefCount:   refCnt,
	}
}

func BlocksWordCount(ids []string) (ret *util.BlockStatResult) {
	ret = &util.BlockStatResult{}
	trees := map[string]*parse.Tree{} // 缓存
	for _, id := range ids {
		bt := treenode.GetBlockTree(id)
		if nil == bt {
			logging.LogWarnf("block tree not found [%s]", id)
			continue
		}

		tree := trees[bt.RootID]
		if nil == tree {
			tree, _ = LoadTree(bt.BoxID, bt.Path)
			if nil == tree {
				continue
			}
			trees[bt.RootID] = tree
		}

		node := treenode.GetNodeInTree(tree, id)
		runeCnt, wordCnt, linkCnt, imgCnt, refCnt := node.Stat()
		ret.RuneCount += runeCnt
		ret.WordCount += wordCnt
		ret.LinkCount += linkCnt
		ret.ImageCount += imgCnt
		ret.RefCount += refCnt
	}
	return
}

func StatTree(id string) (ret *util.BlockStatResult) {
	WaitForWritingFiles()

	tree, _ := loadTreeByBlockID(id)
	if nil == tree {
		return
	}

	runeCnt, wordCnt, linkCnt, imgCnt, refCnt := tree.Root.Stat()
	return &util.BlockStatResult{
		RuneCount:  runeCnt,
		WordCount:  wordCnt,
		LinkCount:  linkCnt,
		ImageCount: imgCnt,
		RefCount:   refCnt,
	}
}

const (
	searchMarkSpanStart      = "<span data-type=\"search-mark\">"
	searchMarkSpanEnd        = "</span>"
	virtualBlockRefSpanStart = "<span data-type=\"virtual-block-ref\">"
	virtualBlockRefSpanEnd   = "</span>"
)

func GetDoc(startID, endID, id string, index int, keyword string, mode int, size int) (blockCount, childBlockCount int, dom, parentID, parent2ID, rootID, typ string, eof bool, boxID, docPath string, err error) {
	WaitForWritingFiles() // 写入数据时阻塞，避免获取到的数据不一致

	inputIndex := index
	tree, err := loadTreeByBlockID(id)
	if nil != err {
		if ErrBlockNotFound == err {
			if 0 == mode {
				err = ErrTreeNotFound // 初始化打开文档时如果找不到则关闭编辑器
			}
		}
		return
	}
	if nil == tree {
		err = ErrBlockNotFound
		return
	}

	luteEngine := NewLute()
	node := treenode.GetNodeInTree(tree, id)
	if nil == node {
		err = ErrBlockNotFound
		return
	}

	located := false
	isDoc := ast.NodeDocument == node.Type
	isHeading := ast.NodeHeading == node.Type
	boxID = node.Box
	docPath = node.Path
	if isDoc {
		if 4 == mode { // 加载文档末尾
			node = node.LastChild
			located = true
			// 重新计算 index
			ast.Walk(tree.Root, func(n *ast.Node, entering bool) ast.WalkStatus {
				if !entering {
					return ast.WalkContinue
				}

				index++
				return ast.WalkContinue
			})
		} else {
			node = node.FirstChild
		}
		typ = ast.NodeDocument.String()
		idx := 0
		if 0 < index {
			ast.Walk(tree.Root, func(n *ast.Node, entering bool) ast.WalkStatus {
				if !entering || !n.IsChildBlockOf(tree.Root, 1) {
					return ast.WalkContinue
				}

				idx++
				if index == idx {
					node = n.DocChild()
					if "1" == node.IALAttr("heading-fold") {
						// 加载到折叠标题下方块的话需要回溯到上方标题块
						for h := node.Previous; nil != h; h = h.Previous {
							if "1" == h.IALAttr("fold") {
								node = h
								break
							}
						}
					}
					located = true
					return ast.WalkStop
				}
				return ast.WalkContinue
			})
		}
	} else {
		if 0 == index && 0 != mode {
			// 非文档且没有指定 index 时需要计算 index
			ast.Walk(tree.Root, func(n *ast.Node, entering bool) ast.WalkStatus {
				if !entering {
					return ast.WalkContinue
				}

				index++
				if id == n.ID {
					node = n.DocChild()
					located = true
					return ast.WalkStop
				}
				return ast.WalkContinue
			})
		}
	}

	if 1 < index && !located {
		count := 0
		ast.Walk(tree.Root, func(n *ast.Node, entering bool) ast.WalkStatus {
			if !entering {
				return ast.WalkContinue
			}

			count++
			if index == count {
				node = n.DocChild()
				return ast.WalkStop
			}
			return ast.WalkContinue
		})
	}

	blockCount = tree.DocBlockCount()
	childBlockCount = treenode.CountBlockNodes(tree.Root)
	if ast.NodeDocument == node.Type {
		parentID = node.ID
		parent2ID = parentID
	} else {
		parentID = node.Parent.ID
		parent2ID = parentID
		tmp := node
		if ast.NodeListItem == node.Type {
			// 列表项聚焦返回和面包屑保持一致 https://github.com/siyuan-note/siyuan/issues/4914
			tmp = node.Parent
		}
		if headingParent := treenode.HeadingParent(tmp); nil != headingParent {
			parent2ID = headingParent.ID
		}
	}
	rootID = tree.Root.ID
	if !isDoc {
		typ = node.Type.String()
	}

	var nodes []*ast.Node

	// 如果同时存在 startID 和 endID，则只加载 startID 和 endID 之间的块 [startID, endID]
	if "" != startID && "" != endID {
		nodes, eof = loadNodesByStartEnd(tree, startID, endID)
		if 1 > len(nodes) {
			// 按 mode 加载兜底
			nodes, eof = loadNodesByMode(node, inputIndex, mode, size, isDoc, isHeading)
		}
	} else {
		nodes, eof = loadNodesByMode(node, inputIndex, mode, size, isDoc, isHeading)
	}

	refCount := sql.QueryRootChildrenRefCount(rootID)
	virtualBlockRefKeywords := getVirtualRefKeywords(tree.Root.IALAttr("title"))

	subTree := &parse.Tree{ID: rootID, Root: &ast.Node{Type: ast.NodeDocument}, Marks: tree.Marks}
	keyword = strings.Join(strings.Split(keyword, " "), search.TermSep)
	keywords := search.SplitKeyword(keyword)

	for _, n := range nodes {
		var unlinks []*ast.Node
		ast.Walk(n, func(n *ast.Node, entering bool) ast.WalkStatus {
			if !entering {
				return ast.WalkContinue
			}

			if "1" == n.IALAttr("heading-fold") {
				unlinks = append(unlinks, n)
				return ast.WalkContinue
			}

			if "" != n.ID {
				// 填充块引计数
				if cnt := refCount[n.ID]; 0 < cnt {
					n.SetIALAttr("refcount", strconv.Itoa(cnt))
				}
			}

			// 支持代码块搜索定位 https://github.com/siyuan-note/siyuan/issues/5520
			if ast.NodeCodeBlockCode == n.Type && 0 < len(keywords) && !treenode.IsChartCodeBlockCode(n) {
				text := string(n.Tokens)
				text = search.EncloseHighlighting(text, keywords, search.SearchMarkLeft, search.SearchMarkRight, Conf.Search.CaseSensitive)
				n.Tokens = gulu.Str.ToBytes(text)
			}

			if ast.NodeText == n.Type {
				if 0 < len(keywords) {
					hitBlock := false
					for p := n.Parent; nil != p; p = p.Parent {
						if p.ID == id {
							hitBlock = true
							break
						}
					}
					if hitBlock {
						if markReplaceSpan(n, &unlinks, string(n.Tokens), keywords, searchMarkSpanStart, searchMarkSpanEnd, luteEngine) {
							return ast.WalkContinue
						}
					}
				}

				if processVirtualRef(n, &unlinks, virtualBlockRefKeywords, refCount, luteEngine) {
					return ast.WalkContinue
				}
			}
			return ast.WalkContinue
		})

		for _, unlink := range unlinks {
			unlink.Unlink()
		}

		subTree.Root.AppendChild(n)
	}

	luteEngine.RenderOptions.NodeIndexStart = index
	dom = luteEngine.Tree2BlockDOM(subTree, luteEngine.RenderOptions)
	return
}

func loadNodesByStartEnd(tree *parse.Tree, startID, endID string) (nodes []*ast.Node, eof bool) {
	node := treenode.GetNodeInTree(tree, startID)
	if nil == node {
		return
	}
	nodes = append(nodes, node)
	for n := node.Next; nil != n; n = n.Next {
		if treenode.IsInFoldedHeading(n, nil) {
			continue
		}
		nodes = append(nodes, n)

		if n.ID == endID {
			if next := n.Next; nil == next {
				eof = true
			} else {
				eof = util2.IsDocIAL(n.Tokens) || util2.IsDocIAL(next.Tokens)
			}
			break
		}
	}
	return
}

func loadNodesByMode(node *ast.Node, inputIndex, mode, size int, isDoc, isHeading bool) (nodes []*ast.Node, eof bool) {
	if 2 == mode /* 向下 */ {
		next := node.Next
		if ast.NodeHeading == node.Type && "1" == node.IALAttr("fold") {
			// 标题展开时进行动态加载导致重复内容 https://github.com/siyuan-note/siyuan/issues/4671
			// 这里要考虑折叠标题是最后一个块的情况
			if children := treenode.HeadingChildren(node); 0 < len(children) {
				next = children[len(children)-1].Next
			}
		}
		if nil == next {
			eof = true
		} else {
			eof = util2.IsDocIAL(node.Tokens) || util2.IsDocIAL(next.Tokens)
		}
	}

	count := 0
	switch mode {
	case 0: // 仅加载当前 ID
		nodes = append(nodes, node)
		if isDoc {
			for n := node.Next; nil != n; n = n.Next {
				if treenode.IsInFoldedHeading(n, nil) {
					continue
				}
				nodes = append(nodes, n)
				if 1 > count {
					count++
				} else {
					count += treenode.CountBlockNodes(n)
				}
				if size < count {
					break
				}
			}
		} else if isHeading {
			level := node.HeadingLevel
			for n := node.Next; nil != n; n = n.Next {
				if treenode.IsInFoldedHeading(n, node) {
					// 大纲点击折叠标题跳转聚焦 https://github.com/siyuan-note/siyuan/issues/4920
					// 多级标题折叠后上级块引浮窗中未折叠 https://github.com/siyuan-note/siyuan/issues/4997
					continue
				}
				if ast.NodeHeading == n.Type {
					if n.HeadingLevel <= level {
						break
					}
				} else if ast.NodeSuperBlock == n.Type {
					if h := treenode.SuperBlockHeading(n); nil != h {
						if level >= h.HeadingLevel {
							break
						}
					}
				}
				nodes = append(nodes, n)
				count++
				if size < count {
					break
				}
			}
		}
	case 4: // Ctrl+End 跳转到末尾后向上加载
		for n := node; nil != n; n = n.Previous {
			if treenode.IsInFoldedHeading(n, nil) {
				continue
			}
			nodes = append([]*ast.Node{n}, nodes...)
			if 1 > count {
				count++
			} else {
				count += treenode.CountBlockNodes(n)
			}
			if size < count {
				break
			}
		}
		eof = true
	case 1: // 向上加载
		for n := node.Previous; /* 从上一个节点开始加载 */ nil != n; n = n.Previous {
			if treenode.IsInFoldedHeading(n, nil) {
				continue
			}
			nodes = append([]*ast.Node{n}, nodes...)
			if 1 > count {
				count++
			} else {
				count += treenode.CountBlockNodes(n)
			}
			if size < count {
				break
			}
		}
		eof = nil == node.Previous
	case 2: // 向下加载
		for n := node.Next; /* 从下一个节点开始加载 */ nil != n; n = n.Next {
			if treenode.IsInFoldedHeading(n, node) {
				continue
			}
			nodes = append(nodes, n)
			if 1 > count {
				count++
			} else {
				count += treenode.CountBlockNodes(n)
			}
			if size < count {
				break
			}
		}
	case 3: // 上下都加载
		for n := node; nil != n; n = n.Previous {
			if treenode.IsInFoldedHeading(n, nil) {
				continue
			}
			nodes = append([]*ast.Node{n}, nodes...)
			if 1 > count {
				count++
			} else {
				count += treenode.CountBlockNodes(n)
			}
			if 0 < inputIndex {
				if 1 < count {
					break // 滑块指示器加载
				}
			} else {
				if size < count {
					break
				}
			}
		}
		if size/2 < count {
			size = size / 2
		} else {
			size = size - count
		}
		count = 0
		for n := node.Next; nil != n; n = n.Next {
			if treenode.IsInFoldedHeading(n, nil) {
				continue
			}
			nodes = append(nodes, n)
			if 1 > count {
				count++
			} else {
				count += treenode.CountBlockNodes(n)
			}
			if 0 < inputIndex {
				if size < count {
					break
				}
			} else {
				if size < count {
					break
				}
			}
		}
	}
	return
}

func writeJSONQueue(tree *parse.Tree) (err error) {
	if err = filesys.WriteTree(tree); nil != err {
		return
	}
	sql.UpsertTreeQueue(tree)
	return
}

func writeJSONQueueWithoutChangeTime(tree *parse.Tree) (err error) {
	if err = filesys.WriteTreeWithoutChangeTime(tree); nil != err {
		return
	}
	sql.UpsertTreeQueue(tree)
	return
}

func indexWriteJSONQueue(tree *parse.Tree) (err error) {
	treenode.ReindexBlockTree(tree)
	return writeJSONQueue(tree)
}

func indexWriteJSONQueueWithoutChangeTime(tree *parse.Tree) (err error) {
	treenode.ReindexBlockTree(tree)
	return writeJSONQueueWithoutChangeTime(tree)
}

func renameWriteJSONQueue(tree *parse.Tree, oldHPath string) (err error) {
	if err = filesys.WriteTree(tree); nil != err {
		return
	}
	sql.RenameTreeQueue(tree, oldHPath)
	treenode.ReindexBlockTree(tree)
	return
}

func DuplicateDoc(rootID string) (ret *parse.Tree, err error) {
	msgId := util.PushMsg(Conf.Language(116), 30000)
	defer util.PushClearMsg(msgId)

	WaitForWritingFiles()
	ret, err = loadTreeByBlockID(rootID)
	if nil != err {
		return
	}

	resetTree(ret, "Duplicated")
	createTreeTx(ret)
	sql.WaitForWritingDatabase()
	return
}

func createTreeTx(tree *parse.Tree) {
	transaction := &Transaction{DoOperations: []*Operation{{Action: "create", Data: tree}}}
	err := PerformTransactions(&[]*Transaction{transaction})
	if nil != err {
		tx, txErr := sql.BeginTx()
		if nil != txErr {
			logging.LogFatalf("transaction failed: %s", txErr)
			return
		}
		sql.ClearBoxHash(tx)
		sql.CommitTx(tx)
		logging.LogFatalf("transaction failed: %s", err)
		return
	}
}

func CreateDocByMd(boxID, p, title, md string, sorts []string) (err error) {
	WaitForWritingFiles()

	box := Conf.Box(boxID)
	if nil == box {
		return errors.New(Conf.Language(0))
	}

	luteEngine := NewLute()
	dom := luteEngine.Md2BlockDOM(md)
	err = createDoc(box.ID, p, title, dom)
	if nil != err {
		return
	}

	ChangeFileTreeSort(box.ID, sorts)
	return
}

func CreateWithMarkdown(boxID, hPath, md string) (id string, err error) {
	box := Conf.Box(boxID)
	if nil == box {
		err = errors.New(Conf.Language(0))
		return
	}

	WaitForWritingFiles()
	luteEngine := NewLute()
	dom := luteEngine.Md2BlockDOM(md)
	id, _, err = createDocsByHPath(box.ID, hPath, dom)
	return
}

func GetHPathByPath(boxID, p string) (hPath string, err error) {
	if "/" == p {
		hPath = "/"
		return
	}

	tree, err := LoadTree(boxID, p)
	if nil != err {
		return
	}
	hPath = tree.HPath
	return
}

func GetHPathsByPaths(paths []string) (hPaths []string, err error) {
	pathsBoxes := getBoxesByPaths(paths)
	for p, box := range pathsBoxes {
		if nil == box {
			logging.LogWarnf("box not found by path [%s]", p)
			continue
		}

		bt := treenode.GetBlockTreeByPath(p)
		if nil == bt {
			logging.LogWarnf("block tree not found by path [%s]", p)
			continue
		}

		hPaths = append(hPaths, box.Name+bt.HPath)
	}
	return
}

func GetHPathByID(id string) (hPath string, err error) {
	tree, err := loadTreeByBlockID(id)
	if nil != err {
		return
	}
	hPath = tree.HPath
	return
}

func GetFullHPathByID(id string) (hPath string, err error) {
	tree, err := loadTreeByBlockID(id)
	if nil != err {
		return
	}

	box := Conf.Box(tree.Box)
	var boxName string
	if nil != box {
		boxName = box.Name
	}
	hPath = boxName + tree.HPath
	return
}

func MoveDocs(fromPaths []string, toBoxID, toPath string) (err error) {
	toBox := Conf.Box(toBoxID)
	if nil == toBox {
		err = errors.New(Conf.Language(0))
		return
	}

	if "/" == toPath {
		// 移动到根目录下时不需要根据目标路径去重，所以这里传入一个不可能存在的随机笔记本名称
		fromPaths = util.FilterMoveDocFromPaths(fromPaths, ast.NewNodeID())
	} else {
		fromPaths = util.FilterMoveDocFromPaths(fromPaths, toPath)
	}
	pathsBoxes := getBoxesByPaths(fromPaths)

	// 检查路径深度是否超过限制
	for fromPath, fromBox := range pathsBoxes {
		childDepth := util.GetChildDocDepth(filepath.Join(util.DataDir, fromBox.ID, fromPath))
		if depth := strings.Count(toPath, "/") + childDepth; 6 < depth && !Conf.FileTree.AllowCreateDeeper {
			err = errors.New(Conf.Language(118))
			return
		}
	}

	needShowProgress := 32 < len(fromPaths)
	if needShowProgress {
		util.PushEndlessProgress(Conf.Language(116))
	}

	WaitForWritingFiles()
	for fromPath, fromBox := range pathsBoxes {
		_, err = moveDoc(fromBox, fromPath, toBox, toPath)
		if nil != err {
			return
		}
	}
	cache.ClearDocsIAL()
	IncSync()

	if needShowProgress {
		util.PushEndlessProgress(Conf.Language(113))
		sql.WaitForWritingDatabase()
		util.ReloadUI()
	}
	return
}

func moveDoc(fromBox *Box, fromPath string, toBox *Box, toPath string) (newPath string, err error) {
	isSameBox := fromBox.ID == toBox.ID

	if isSameBox {
		if !fromBox.Exist(toPath) {
			err = ErrBlockNotFound
			return
		}
	} else {
		if !toBox.Exist(toPath) {
			err = ErrBlockNotFound
			return
		}
	}

	tree, err := LoadTree(fromBox.ID, fromPath)
	if nil != err {
		err = ErrBlockNotFound
		return
	}

	moveToRoot := "/" == toPath
	toBlockID := tree.ID
	fromFolder := path.Join(path.Dir(fromPath), tree.ID)
	toFolder := "/"
	if !moveToRoot {
		var toTree *parse.Tree
		if isSameBox {
			toTree, err = LoadTree(fromBox.ID, toPath)
		} else {
			toTree, err = LoadTree(toBox.ID, toPath)
		}
		if nil != err {
			err = ErrBlockNotFound
			return
		}

		toBlockID = toTree.ID
		toFolder = path.Join(path.Dir(toPath), toBlockID)
	}

	if isSameBox {
		if err = fromBox.MkdirAll(toFolder); nil != err {
			return
		}
	} else {
		if err = toBox.MkdirAll(toFolder); nil != err {
			return
		}
	}

	if fromBox.Exist(fromFolder) {
		// 移动子文档文件夹

		newFolder := path.Join(toFolder, tree.ID)
		if isSameBox {
			if err = fromBox.Move(fromFolder, newFolder); nil != err {
				return
			}
		} else {
			absFromPath := filepath.Join(util.DataDir, fromBox.ID, fromFolder)
			absToPath := filepath.Join(util.DataDir, toBox.ID, newFolder)
			if gulu.File.IsExist(absToPath) {
				filelock.Remove(absToPath)
			}
			if err = filelock.Move(absFromPath, absToPath); nil != err {
				msg := fmt.Sprintf(Conf.Language(5), fromBox.Name, fromPath, err)
				logging.LogErrorf("move [path=%s] in box [%s] failed: %s", fromPath, fromBox.ID, err)
				err = errors.New(msg)
				return
			}
		}
	}

	newPath = path.Join(toFolder, tree.ID+".sy")

	if isSameBox {
		if err = fromBox.Move(fromPath, newPath); nil != err {
			return
		}

		tree, err = LoadTree(fromBox.ID, newPath)
		if nil != err {
			return
		}

		moveTree(tree)
	} else {
		absFromPath := filepath.Join(util.DataDir, fromBox.ID, fromPath)
		absToPath := filepath.Join(util.DataDir, toBox.ID, newPath)
		if err = filelock.Move(absFromPath, absToPath); nil != err {
			msg := fmt.Sprintf(Conf.Language(5), fromBox.Name, fromPath, err)
			logging.LogErrorf("move [path=%s] in box [%s] failed: %s", fromPath, fromBox.ID, err)
			err = errors.New(msg)
			return
		}

		tree, err = LoadTree(toBox.ID, newPath)
		if nil != err {
			return
		}

		moveTree(tree)
		moveSorts(tree.ID, fromBox.ID, toBox.ID)
	}

	evt := util.NewCmdResult("moveDoc", 0, util.PushModeBroadcast, util.PushModeNone)
	evt.Data = map[string]interface{}{
		"fromNotebook": fromBox.ID,
		"fromPath":     fromPath,
		"toNotebook":   toBox.ID,
		"toPath":       toPath,
		"newPath":      newPath,
	}
	util.PushEvent(evt)
	return
}

func RemoveDoc(boxID, p string) (err error) {
	box := Conf.Box(boxID)
	if nil == box {
		err = errors.New(Conf.Language(0))
		return
	}

	WaitForWritingFiles()
	err = removeDoc(box, p)
	if nil != err {
		return
	}
	IncSync()
	return
}

func RemoveDocs(paths []string) (err error) {
	util.PushEndlessProgress(Conf.Language(116))
	defer util.PushClearProgress()

	paths = util.FilterSelfChildDocs(paths)
	pathsBoxes := getBoxesByPaths(paths)
	WaitForWritingFiles()
	for p, box := range pathsBoxes {
		err = removeDoc(box, p)
		if nil != err {
			return
		}
	}
	return
}

func removeDoc(box *Box, p string) (err error) {
	tree, err := LoadTree(box.ID, p)
	if nil != err {
		return
	}

	historyDir, err := GetHistoryDir(HistoryOpDelete)
	if nil != err {
		logging.LogErrorf("get history dir failed: %s", err)
		return
	}

	historyPath := filepath.Join(historyDir, box.ID, p)
	absPath := filepath.Join(util.DataDir, box.ID, p)
	if err = filelock.Copy(absPath, historyPath); nil != err {
		return errors.New(fmt.Sprintf(Conf.Language(70), box.Name, absPath, err))
	}

	copyDocAssetsToDataAssets(box.ID, p)

	var removeIDs []string
	ids := treenode.RootChildIDs(tree.ID)
	removeIDs = append(removeIDs, ids...)

	dir := path.Dir(p)
	childrenDir := path.Join(dir, tree.ID)
	existChildren := box.Exist(childrenDir)
	if existChildren {
		absChildrenDir := filepath.Join(util.DataDir, tree.Box, childrenDir)
		historyPath = filepath.Join(historyDir, tree.Box, childrenDir)
		if err = filelock.Copy(absChildrenDir, historyPath); nil != err {
			return
		}
	}
	indexHistoryDir(filepath.Base(historyDir), NewLute())

	if existChildren {
		if err = box.Remove(childrenDir); nil != err {
			return
		}
	}
	if err = box.Remove(p); nil != err {
		return
	}
	box.removeSort(removeIDs)

	treenode.RemoveBlockTreesByPathPrefix(childrenDir)
	sql.RemoveTreePathQueue(box.ID, childrenDir)

	if "/" != dir {
		others, err := os.ReadDir(filepath.Join(util.DataDir, box.ID, dir))
		if nil == err && 1 > len(others) {
			box.Remove(dir)
		}
	}

	cache.RemoveDocIAL(p)

	evt := util.NewCmdResult("removeDoc", 0, util.PushModeBroadcast, util.PushModeNone)
	evt.Data = map[string]interface{}{
		"ids": removeIDs,
	}
	util.PushEvent(evt)
	return
}

func RenameDoc(boxID, p, title string) (err error) {
	box := Conf.Box(boxID)
	if nil == box {
		err = errors.New(Conf.Language(0))
		return
	}

	WaitForWritingFiles()
	tree, err := LoadTree(box.ID, p)
	if nil != err {
		return
	}

	title = gulu.Str.RemoveInvisible(title)
	if 512 < utf8.RuneCountInString(title) {
		// 限制笔记本名和文档名最大长度为 `512` https://github.com/siyuan-note/siyuan/issues/6299
		return errors.New(Conf.Language(106))
	}

	oldTitle := tree.Root.IALAttr("title")
	if oldTitle == title {
		return
	}
	if "" == title {
		title = "Untitled"
	}

	oldHPath := tree.HPath
	tree.HPath = path.Join(path.Dir(tree.HPath), title)
	tree.Root.SetIALAttr("title", title)
	tree.Root.SetIALAttr("updated", util.CurrentTimeSecondsStr())

	if err = renameWriteJSONQueue(tree, oldHPath); nil != err {
		return
	}

	refText := getNodeRefText(tree.Root)
	evt := util.NewCmdResult("rename", 0, util.PushModeBroadcast, util.PushModeNone)
	evt.Data = map[string]interface{}{
		"box":     boxID,
		"id":      tree.Root.ID,
		"path":    p,
		"title":   title,
		"refText": refText,
	}
	util.PushEvent(evt)

	box.renameSubTrees(tree)
	updateRefTextRenameDoc(tree)
	IncSync()
	return
}

func CreateDailyNote(boxID string) (p string, existed bool, err error) {
	box := Conf.Box(boxID)
	if nil == box {
		err = ErrBoxNotFound
		return
	}

	boxConf := box.GetConf()
	if "" == boxConf.DailyNoteSavePath || "/" == boxConf.DailyNoteSavePath {
		err = errors.New(Conf.Language(49))
		return
	}

	hPath, err := RenderCreateDocNameTemplate(boxConf.DailyNoteSavePath)
	if nil != err {
		return
	}

	WaitForWritingFiles()

	existRoot := treenode.GetBlockTreeRootByHPath(box.ID, hPath)
	if nil != existRoot {
		existed = true
		p = existRoot.Path
		return
	}

	id, existed, err := createDocsByHPath(box.ID, hPath, "")
	if nil != err {
		return
	}

	var dom string
	if "" != boxConf.DailyNoteTemplatePath {
		tplPath := filepath.Join(util.DataDir, "templates", boxConf.DailyNoteTemplatePath)
		if !gulu.File.IsExist(tplPath) {
			logging.LogWarnf("not found daily note template [%s]", tplPath)
		} else {
			dom, err = renderTemplate(tplPath, id)
			if nil != err {
				logging.LogWarnf("render daily note template [%s] failed: %s", boxConf.DailyNoteTemplatePath, err)
			}
		}
	}
	if "" != dom {
		var tree *parse.Tree
		tree, err = loadTreeByBlockID(id)
		if nil == err {
			tree.Root.FirstChild.Unlink()

			luteEngine := NewLute()
			newTree := luteEngine.BlockDOM2Tree(dom)
			var children []*ast.Node
			for c := newTree.Root.FirstChild; nil != c; c = c.Next {
				children = append(children, c)
			}
			for _, c := range children {
				tree.Root.AppendChild(c)
			}
			tree.Root.SetIALAttr("updated", util.CurrentTimeSecondsStr())
			if err = indexWriteJSONQueue(tree); nil != err {
				return
			}
		}
	}
	IncSync()

	b := treenode.GetBlockTree(id)
	p = b.Path
	return
}

func createDoc(boxID, p, title, dom string) (err error) {
	title = gulu.Str.RemoveInvisible(title)
	if 512 < utf8.RuneCountInString(title) {
		// 限制笔记本名和文档名最大长度为 `512` https://github.com/siyuan-note/siyuan/issues/6299
		return errors.New(Conf.Language(106))
	}

	baseName := strings.TrimSpace(path.Base(p))
	if "" == strings.TrimSuffix(baseName, ".sy") {
		return errors.New(Conf.Language(16))
	}

	if strings.HasPrefix(baseName, ".") {
		return errors.New(Conf.Language(13))
	}

	box := Conf.Box(boxID)
	if nil == box {
		return errors.New(Conf.Language(0))
	}

	id := strings.TrimSuffix(path.Base(p), ".sy")
	var hPath string
	folder := path.Dir(p)
	if "/" != folder {
		parentID := path.Base(folder)
		parentTree, err := loadTreeByBlockID(parentID)
		if nil != err {
			logging.LogErrorf("get parent tree [id=%s] failed", parentID)
			return ErrBlockNotFound
		}
		hPath = path.Join(parentTree.HPath, title)
	} else {
		hPath = "/" + title
	}

	if depth := strings.Count(p, "/"); 7 < depth && !Conf.FileTree.AllowCreateDeeper {
		err = errors.New(Conf.Language(118))
		return
	}

	if !box.Exist(folder) {
		if err = box.MkdirAll(folder); nil != err {
			return err
		}
	}

	if box.Exist(p) {
		return errors.New(Conf.Language(1))
	}

	var tree *parse.Tree
	luteEngine := NewLute()
	tree = luteEngine.BlockDOM2Tree(dom)
	tree.Box = boxID
	tree.Path = p
	tree.HPath = hPath
	tree.ID = id
	tree.Root.ID = id
	tree.Root.Spec = "1"
	updated := util.TimeFromID(id)
	tree.Root.KramdownIAL = [][]string{{"id", id}, {"title", html.EscapeAttrVal(title)}, {"updated", updated}}
	if nil == tree.Root.FirstChild {
		tree.Root.AppendChild(parse.NewParagraph())
	}

	transaction := &Transaction{DoOperations: []*Operation{{Action: "create", Data: tree}}}
	err = PerformTransactions(&[]*Transaction{transaction})
	if nil != err {
		tx, txErr := sql.BeginTx()
		if nil != txErr {
			logging.LogFatalf("transaction failed: %s", txErr)
			return
		}
		sql.ClearBoxHash(tx)
		sql.CommitTx(tx)
		logging.LogFatalf("transaction failed: %s", err)
		return
	}
	WaitForWritingFiles()
	return
}

func moveSorts(rootID, fromBox, toBox string) {
	root := treenode.GetBlockTree(rootID)
	if nil == root {
		return
	}

	fromRootSorts := map[string]int{}
	ids := treenode.RootChildIDs(rootID)
	fromConfPath := filepath.Join(util.DataDir, fromBox, ".siyuan", "sort.json")
	fromFullSortIDs := map[string]int{}
	if gulu.File.IsExist(fromConfPath) {
		data, err := filelock.ReadFile(fromConfPath)
		if nil != err {
			logging.LogErrorf("read sort conf failed: %s", err)
			return
		}

		if err = gulu.JSON.UnmarshalJSON(data, &fromFullSortIDs); nil != err {
			logging.LogErrorf("unmarshal sort conf failed: %s", err)
		}
	}
	for _, id := range ids {
		fromRootSorts[id] = fromFullSortIDs[id]
	}

	toConfPath := filepath.Join(util.DataDir, toBox, ".siyuan", "sort.json")
	toFullSortIDs := map[string]int{}
	if gulu.File.IsExist(toConfPath) {
		data, err := filelock.ReadFile(toConfPath)
		if nil != err {
			logging.LogErrorf("read sort conf failed: %s", err)
			return
		}

		if err = gulu.JSON.UnmarshalJSON(data, &toFullSortIDs); nil != err {
			logging.LogErrorf("unmarshal sort conf failed: %s", err)
			return
		}
	}

	for id, sortVal := range fromRootSorts {
		toFullSortIDs[id] = sortVal
	}

	data, err := gulu.JSON.MarshalIndentJSON(toFullSortIDs, "", "  ")
	if nil != err {
		logging.LogErrorf("marshal sort conf failed: %s", err)
		return
	}
	if err = filelock.WriteFile(toConfPath, data); nil != err {
		logging.LogErrorf("write sort conf failed: %s", err)
		return
	}
}

func ChangeFileTreeSort(boxID string, paths []string) {
	if 1 > len(paths) {
		return
	}

	WaitForWritingFiles()
	box := Conf.Box(boxID)
	sortIDs := map[string]int{}
	max := 0
	for i, p := range paths {
		id := strings.TrimSuffix(path.Base(p), ".sy")
		sortIDs[id] = i + 1
		if i == len(paths)-1 {
			max = i + 2
		}
	}

	p := paths[0]
	parentPath := path.Dir(p)
	absParentPath := filepath.Join(util.DataDir, boxID, parentPath)
	files, err := os.ReadDir(absParentPath)
	if nil != err {
		logging.LogErrorf("read dir [%s] failed: %s", err)
	}

	sortFolderIDs := map[string]int{}
	for _, f := range files {
		if !strings.HasSuffix(f.Name(), ".sy") {
			continue
		}

		id := strings.TrimSuffix(f.Name(), ".sy")
		val := sortIDs[id]
		if 0 == val {
			val = max
			max++
		}
		sortFolderIDs[id] = val
	}

	confDir := filepath.Join(util.DataDir, box.ID, ".siyuan")
	if err = os.MkdirAll(confDir, 0755); nil != err {
		logging.LogErrorf("create conf dir failed: %s", err)
		return
	}
	confPath := filepath.Join(confDir, "sort.json")
	fullSortIDs := map[string]int{}
	var data []byte
	if gulu.File.IsExist(confPath) {
		data, err = filelock.ReadFile(confPath)
		if nil != err {
			logging.LogErrorf("read sort conf failed: %s", err)
			return
		}

		if err = gulu.JSON.UnmarshalJSON(data, &fullSortIDs); nil != err {
			logging.LogErrorf("unmarshal sort conf failed: %s", err)
		}
	}

	for sortID, sortVal := range sortFolderIDs {
		fullSortIDs[sortID] = sortVal
	}

	data, err = gulu.JSON.MarshalIndentJSON(fullSortIDs, "", "  ")
	if nil != err {
		logging.LogErrorf("marshal sort conf failed: %s", err)
		return
	}
	if err = filelock.WriteFile(confPath, data); nil != err {
		logging.LogErrorf("write sort conf failed: %s", err)
		return
	}

	IncSync()
}

func (box *Box) fillSort(files *[]*File) {
	confPath := filepath.Join(util.DataDir, box.ID, ".siyuan", "sort.json")
	if !gulu.File.IsExist(confPath) {
		return
	}

	data, err := filelock.ReadFile(confPath)
	if nil != err {
		logging.LogErrorf("read sort conf failed: %s", err)
		return
	}

	fullSortIDs := map[string]int{}
	if err = gulu.JSON.UnmarshalJSON(data, &fullSortIDs); nil != err {
		logging.LogErrorf("unmarshal sort conf failed: %s", err)
		return
	}

	for _, f := range *files {
		id := strings.TrimSuffix(f.ID, ".sy")
		f.Sort = fullSortIDs[id]
	}
}

func (box *Box) removeSort(ids []string) {
	confPath := filepath.Join(util.DataDir, box.ID, ".siyuan", "sort.json")
	if !gulu.File.IsExist(confPath) {
		return
	}

	data, err := filelock.ReadFile(confPath)
	if nil != err {
		logging.LogErrorf("read sort conf failed: %s", err)
		return
	}

	fullSortIDs := map[string]int{}
	if err = gulu.JSON.UnmarshalJSON(data, &fullSortIDs); nil != err {
		logging.LogErrorf("unmarshal sort conf failed: %s", err)
		return
	}

	for _, toRemove := range ids {
		delete(fullSortIDs, toRemove)
	}

	data, err = gulu.JSON.MarshalIndentJSON(fullSortIDs, "", "  ")
	if nil != err {
		logging.LogErrorf("marshal sort conf failed: %s", err)
		return
	}
	if err = filelock.WriteFile(confPath, data); nil != err {
		logging.LogErrorf("write sort conf failed: %s", err)
		return
	}
}

func ServeFile(c *gin.Context, filePath string) (err error) {
	WaitForWritingFiles()
	c.File(filePath)
	return
}