func TestBib2ref(t *testing.T) {
c := cmd.AppCtx()
c.Debug = testing.Verbose()
lnc := b2s(cmd.ByteLines(cmd.Get("/zx/lib/bib/zx.bib", 0, -1)))
rc := bib2ref(lnc)
for ln := range rc {
cmd.Dprintf("%s", ln)
}
}
func b2s(in <-chan []byte) <-chan string {
rc := make(chan string)
go func() {
for x := range in {
if ok := rc <- string(x); !ok {
close(in, cerror(rc))
}
}
close(rc, cerror(in))
}()
return rc
}
func (b *Bib) loadBib(fn string) error {
lnc := b2s(cmd.ByteLines(cmd.Get(fn, 0, zx.All)))
ln := <-lnc
if !strings.Contains(ln, "bib2ref ok") {
close(lnc, "not for me")
return nil
}
cmd.Dprintf("add file %s\n", fn)
return b.loadLines(bib2ref(lnc))
}
func bib2ref(lnc <-chan string) chan string {
rc := make(chan string)
go parseBib(lnc, rc)
return rc
}
func parseBib(lnc <-chan string, outc chan<- string) {
for r, err := parse1Bib(lnc); err != io.EOF; r, err = parse1Bib(lnc) {
for _, ln := range r {
outc <- ln
}
outc <- "\n"
}
close(outc, cerror(lnc))
}
// trim space and no final ,
func cleanLn(ln string) string {
ln = strings.TrimSpace(ln)
if len(ln) > 0 && ln[len(ln)-1] == ',' {
ln = ln[:len(ln)-1]
}
return ln
}
func parse1Bib(lnc <-chan string) ([]string, error) {
for {
ln, ok := <-lnc
if !ok {
return nil, io.EOF
}
ln = cleanLn(ln)
if ln == "" {
continue
}
if ln[0] != '@' {
continue
}
out := []string{}
brace := strings.IndexRune(ln, '{')
if brace < 0 {
continue
}
ln = ln[brace+1:]
toks := strings.Fields(ln)
if len(toks) > 0 {
out = append(out, "%K "+toks[0]+"\n")
}
for fld, err := parseField(lnc); err != io.EOF && fld != nil; fld, err = parseField(lnc) {
out = append(out, fld...)
}
return out, nil
}
}
var keys = map[string]string{
"author": "A",
"title": "T",
"note": "O",
"booktitle": "B",
"series": "S",
"year": "D",
"location": "C",
"address": "C",
"pages": "P",
"url": "O",
"publisher": "I",
"key": "K",
"volume": "V",
"journal": "J",
"keywords": "K",
"organization": "I",
}
func parseField(lnc <-chan string) ([]string, error) {
for {
ln, ok := <-lnc
if !ok {
return nil, io.EOF
}
ln = cleanLn(ln)
if ln == "" {
return nil, nil
}
if ln[0] == '%' {
continue
}
toks := strings.SplitN(ln, "=", 2)
if len(toks) != 2 {
continue
}
fname := strings.ToLower(strings.TrimSpace(toks[0]))
if k := keys[fname]; k != "" {
val := parseValue(k, toks[1])
for i, v := range val {
val[i] = fmt.Sprintf("%%%s %s\n", k, strings.TrimSpace(v))
}
return val, nil
}
}
}
func parseValue(key, ln string) []string {
ln = strings.TrimSpace(ln)
if len(ln) == 0 {
return nil
}
if ln[0] == '"' {
ln = ln[1:]
if len(ln) > 0 && ln[len(ln)-1] == '"' {
ln = ln[:len(ln)-1]
}
} else if len(ln) > 0 && ln[0] == '{' {
ln = ln[1:]
if len(ln) > 0 && ln[len(ln)-1] == '}' {
ln = ln[:len(ln)-1]
}
}
nln := ""
incaps := 0
for _, r := range ln {
switch r {
case '\\', '\'':
continue
case '{':
incaps++
case '}':
incaps--
default:
if incaps <= 0 || key == "A" {
nln += string(r)
} else {
nln += strings.ToUpper(string(r))
}
}
}
ln = nln
if key == "A" {
return strings.Split(ln, " and ")
}
if key == "K" {
return strings.Split(ln, ",")
}
return []string{strings.TrimSpace(ln)}
}