github.com/Ptt-official-app/go-bbs@v0.12.0/formosabbs/file.go (about)

     1  package bbs
     2  
     3  import (
     4  	"github.com/Ptt-official-app/go-bbs"
     5  
     6  	"bytes"
     7  	"encoding/binary"
     8  	"io"
     9  	"log"
    10  	"os"
    11  	"time"
    12  )
    13  
    14  const (
    15  	StrLength = 80
    16  
    17  	PosOfFileHeaderFilename = 0
    18  	PosOfFileHeaderOwner    = StrLength
    19  	PosOfFileHeaderPostno   = StrLength - 8
    20  	PosOfFileHeaderModified = PosOfFileHeaderOwner + StrLength - 8
    21  	PosOfFileHeaderTitle    = PosOfFileHeaderOwner + StrLength
    22  )
    23  
    24  type FileHeader struct {
    25  	Filename  string
    26  	Modified  time.Time
    27  	Recommend int8   // Important Level
    28  	Owner     string // uid[.]
    29  	Date      string
    30  	Title     string
    31  
    32  	Money   int
    33  	AnnoUID int
    34  	// VoteLimits
    35  	ReferRef  uint // 至底公告？
    36  	ReferFlag bool // 至底公告？
    37  
    38  	Filemode uint8
    39  
    40  	Postno int32 // FormosaBBS only
    41  }
    42  
    43  func OpenFormosaBBSFileHeaderFile(filename string) ([]*FileHeader, error) {
    44  	file, err := os.Open(filename)
    45  	if err != nil {
    46  		log.Println(err)
    47  		return nil, err
    48  	}
    49  
    50  	ret := []*FileHeader{}
    51  
    52  	for {
    53  		hdr := make([]byte, 248)
    54  		_, err := file.Read(hdr)
    55  		// log.Println(len, err)
    56  		if err == io.EOF {
    57  			break
    58  		}
    59  
    60  		f, err := NewFomosaBBSFileHeaderWithByte(hdr)
    61  		if err != nil {
    62  			return nil, err
    63  		}
    64  		ret = append(ret, f)
    65  		// log.Println(f.Filename)
    66  
    67  	}
    68  
    69  	return ret, nil
    70  
    71  }
    72  
    73  func NewFomosaBBSFileHeaderWithByte(data []byte) (*FileHeader, error) {
    74  
    75  	ret := FileHeader{}
    76  	ret.Filename = string(bytes.Trim(data[PosOfFileHeaderFilename:+PosOfFileHeaderFilename+44], "\x00"))
    77  
    78  	modifiedInt := binary.LittleEndian.Uint32(data[PosOfFileHeaderModified : PosOfFileHeaderModified+4])
    79  	// log.Println("modifiedInt:", modifiedInt, PosOfModified)
    80  	ret.Modified = time.Unix(int64(modifiedInt), 0)
    81  
    82  	// ret.Recommend = int8(data[PosOfRecommend])
    83  	ret.Owner = string(bytes.Trim(data[PosOfFileHeaderOwner:PosOfFileHeaderOwner+72], "\x00"))
    84  	// ret.Date = string(bytes.Trim(data[PosOfDate:PosOfDate+6], "\x00"))
    85  	ret.Title = bbs.Big5ToUtf8(bytes.Trim(data[PosOfFileHeaderTitle:PosOfFileHeaderTitle+67], "\x00"))
    86  	// // log.Println("PosOfUnionMulti:", PosOfUnionMulti, data[PosOfUnionMulti])
    87  
    88  	// ret.Money = int(binary.LittleEndian.Uint32(data[PosOfUnionMulti : PosOfUnionMulti+4]))
    89  	// ret.AnnoUID = int(binary.LittleEndian.Uint32(data[PosOfUnionMulti : PosOfUnionMulti+4]))
    90  
    91  	// ret.Filemode = uint8(data[PosOfFilemode])
    92  
    93  	// if ret.IsVotePost() {
    94  	// 	ret.VoteLimits.Posts = data[PosOfUnionMulti+0]
    95  	// 	ret.VoteLimits.Logins = data[PosOfUnionMulti+1]
    96  	// 	ret.VoteLimits.Regtime = data[PosOfUnionMulti+2]
    97  	// 	ret.VoteLimits.Badpost = data[PosOfUnionMulti+3]
    98  	// }
    99  
   100  	ret.Postno = int32(binary.LittleEndian.Uint32(data[PosOfFileHeaderPostno : PosOfFileHeaderPostno+4]))
   101  	// ret.Title = binary.LittleEndian.Uint8(data[FileNameLength+5+PTT_IDLEN+2+6 : FileNameLength+5+PTT_IDLEN+2+6+TitleLength+1])
   102  
   103  	return &ret, nil
   104  }