go-pkg/mercury/parse.go

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2024-01-22 16:00:58 -07:00
package mercury
import (
"bufio"
"io"
"strings"
)
func ParseText(body io.Reader) (config SpaceMap, err error) {
config = make(SpaceMap)
var space string
var name string
var tags []string
var notes []string
var seq uint64
scanner := bufio.NewScanner(body)
for scanner.Scan() {
line := scanner.Text()
if len(line) == 0 {
continue
}
if strings.HasPrefix(line, "#") {
notes = append(notes, strings.TrimPrefix(line, "# "))
continue
}
if strings.HasPrefix(line, "@") {
var c *Space
var ok bool
sp := strings.Fields(strings.TrimPrefix(line, "@"))
space = sp[0]
if c, ok = config[space]; !ok {
c = &Space{Space: space}
}
c.Notes = append(make([]string, 0, len(notes)), notes...)
c.Tags = append(make([]string, 0, len(sp[1:])), sp[1:]...)
config[space] = c
notes = notes[:0]
tags = tags[:0]
continue
}
if space == "" {
continue
}
sp := strings.SplitN(line, ":", 2)
if len(sp) < 2 {
continue
}
if strings.TrimSpace(sp[0]) == "" {
var c *Space
var ok bool
if c, ok = config[space]; !ok {
c = &Space{Space: space}
}
c.List[len(c.List)-1].Values = append(c.List[len(c.List)-1].Values, sp[1])
config[space] = c
continue
}
fields := strings.Fields(sp[0])
name = fields[0]
if len(fields) > 1 {
tags = fields[1:]
}
var c *Space
var ok bool
if c, ok = config[space]; !ok {
c = &Space{Space: space}
}
seq++
c.List = append(
c.List,
Value{
Seq: seq,
Name: name,
Tags: append(make([]string, 0, len(tags)), tags...),
Notes: append(make([]string, 0, len(notes)), notes...),
Values: []string{sp[1]},
},
)
config[space] = c
notes = notes[:0]
tags = tags[:0]
}
if err = scanner.Err(); err != nil {
return nil, err
}
return
}