/
existential.go
150 lines (109 loc) · 2.98 KB
/
existential.go
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package properties
import (
"github.com/sfomuseum/go-edtf"
"github.com/tidwall/gjson"
"github.com/whosonfirst/go-whosonfirst-flags"
"github.com/whosonfirst/go-whosonfirst-flags/existential"
)
func IsCurrent(body []byte) (flags.ExistentialFlag, error) {
rsp := gjson.GetBytes(body, "properties.mz:is_current")
if rsp.Exists() {
v := rsp.Int()
if v == 1 || v == 0 {
return existential.NewKnownUnknownFlag(v)
}
}
d, err := IsDeprecated(body)
if err != nil {
return nil, err
}
if d.IsTrue() && d.IsKnown() {
return existential.NewKnownUnknownFlag(0)
}
c, err := IsCeased(body)
if err != nil {
return nil, err
}
if c.IsTrue() && c.IsKnown() {
return existential.NewKnownUnknownFlag(0)
}
s, err := IsSuperseded(body)
if err != nil {
return nil, err
}
if s.IsTrue() && s.IsKnown() {
return existential.NewKnownUnknownFlag(0)
}
return existential.NewKnownUnknownFlag(-1)
}
func IsDeprecated(body []byte) (flags.ExistentialFlag, error) {
rsp := gjson.GetBytes(body, "properties.edtf:deprecated")
// "-" is not part of the EDTF spec it's just a default
// string that we define for use in the switch statements
// below (20210209/thisisaaronland)
v := rsp.String()
// 2019 EDTF spec (ISO-8601:1/2)
switch v {
case "-":
return existential.NewKnownUnknownFlag(0)
case edtf.UNKNOWN:
return existential.NewKnownUnknownFlag(-1)
default:
// pass
}
// 2012 EDTF spec - annoyingly the semantics of ""
// changed between the two (was meant to signal open
// and now signals unknown)
switch v {
case "-":
return existential.NewKnownUnknownFlag(0)
case "u":
return existential.NewKnownUnknownFlag(-1)
case "uuuu":
return existential.NewKnownUnknownFlag(-1)
default:
//
}
return existential.NewKnownUnknownFlag(1)
}
func IsCeased(body []byte) (flags.ExistentialFlag, error) {
rsp := gjson.GetBytes(body, "properties.edtf:cessation")
v := rsp.String()
// 2019 EDTF spec (ISO-8601:1/2)
switch v {
case edtf.OPEN:
return existential.NewKnownUnknownFlag(0)
case edtf.UNKNOWN:
return existential.NewKnownUnknownFlag(-1)
default:
// pass
}
// 2012 EDTF spec - annoyingly the semantics of ""
// changed between the two (was meant to signal open
// and now signals unknown)
switch v {
case "":
return existential.NewKnownUnknownFlag(0)
case "u":
return existential.NewKnownUnknownFlag(-1)
case "uuuu":
return existential.NewKnownUnknownFlag(-1)
default:
// pass
}
return existential.NewKnownUnknownFlag(1)
}
func IsSuperseded(body []byte) (flags.ExistentialFlag, error) {
rsp := gjson.GetBytes(body, "properties.wof:superseded_by")
if rsp.Exists() && len(rsp.Array()) > 0 {
return existential.NewKnownUnknownFlag(1)
}
return existential.NewKnownUnknownFlag(0)
}
func IsSuperseding(body []byte) (flags.ExistentialFlag, error) {
rsp := gjson.GetBytes(body, "properties.wof:supersedes")
if rsp.Exists() && len(rsp.Array()) > 0 {
return existential.NewKnownUnknownFlag(1)
}
return existential.NewKnownUnknownFlag(0)
}