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schema.go
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/
schema.go
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package source
import (
"context"
"path/filepath"
"time"
"github.com/pkg/errors"
"admini.dev/admini/app/lib/filesystem"
"admini.dev/admini/app/lib/schema"
"admini.dev/admini/app/util"
)
func (s *Service) LoadSchema(key string) (*schema.Schema, error) {
curr, ok := s.schemaCache[key]
if ok {
return curr, nil
}
var ret *schema.Schema
p := filepath.Join(s.root, key, "schema.json")
if s.files.Exists(p) {
out, err := s.files.ReadFile(p)
if err != nil {
return nil, errors.Wrap(err, "unable to read schema")
}
ret = &schema.Schema{}
err = util.FromJSON(out, ret)
if err != nil {
return nil, err
}
}
if ret != nil {
err := s.loadOverrides(key, ret)
if err != nil {
return nil, errors.Wrap(err, "unable to calculate overrides")
}
err = ret.CreateReferences()
if err != nil {
return nil, errors.Wrap(err, "unable to calculate references")
}
}
s.schemaCache[key] = ret
return ret, nil
}
func (s *Service) SaveSchema(key string, sch *schema.Schema) error {
p := filepath.Join(s.root, key, "schema.json")
j := util.ToJSONBytes(sch, true)
err := s.files.WriteFile(p, j, filesystem.DefaultMode, true)
if err != nil {
return errors.Wrapf(err, "unable to save schema [%s]", key)
}
s.schemaCache[key] = sch
return nil
}
func (s *Service) SchemaRefresh(ctx context.Context, key string, logger util.Logger) (*schema.Schema, float64, error) {
startNanos := time.Now().UnixNano()
source, err := s.Load(key, false, logger)
if err != nil {
return nil, 0, errors.Wrapf(err, "can't load source with key [%s]", key)
}
ld, err := s.loaders.Get(source.Type, source.Key, source.Config)
if err != nil {
return nil, 0, errors.Wrapf(err, "can't create loader for source [%s]", key)
}
if ld == nil {
return nil, 0, errors.Errorf("no loader defined for type [%s]", source.Type.String())
}
sch, err := ld.Schema(ctx)
if err != nil {
return nil, 0, errors.Wrapf(err, "can't load schema with key [%s]", key)
}
elapsedMillis := float64((time.Now().UnixNano()-startNanos)/int64(time.Microsecond)) / float64(1000)
err = s.SaveSchema(key, sch)
if err != nil {
return nil, 0, errors.Wrapf(err, "can't save source with key [%s]", key)
}
err = s.loadOverrides(key, sch)
if err != nil {
return nil, 0, errors.Wrap(err, "unable to calculate overrides")
}
err = sch.CreateReferences()
if err != nil {
return nil, 0, err
}
return sch, elapsedMillis, err
}