1package policies
 2
 3import (
 4	"embed"
 5	_ "embed"
 6	"fmt"
 7	"io/fs"
 8	"os"
 9	"strings"
10
11	"github.com/cedar-policy/cedar-go"
12	"github.com/cedar-policy/cedar-go/types"
13	"github.com/rs/zerolog"
14	"github.com/xlgmokha/x/pkg/log"
15)
16
17//go:embed *.cedar *.json
18var files embed.FS
19
20var All *cedar.PolicySet = cedar.NewPolicySet()
21var Entities cedar.EntityMap = cedar.EntityMap{}
22var Logger *zerolog.Logger = log.New(os.Stderr, log.Fields{"pkg": "policies"})
23
24func init() {
25	err := fs.WalkDir(files, ".", func(path string, d fs.DirEntry, err error) error {
26		if err != nil {
27			return err
28		}
29
30		if d.IsDir() {
31			return nil
32		}
33
34		if strings.HasSuffix(path, ".cedar") {
35			content, err := fs.ReadFile(files, path)
36			if err != nil {
37				return err
38			}
39
40			policy := cedar.Policy{}
41			if err := policy.UnmarshalCedar(content); err != nil {
42				return err
43			}
44			policy.SetFilename(path)
45
46			All.Add(cedar.PolicyID(path), &policy)
47		} else if strings.HasSuffix(path, ".json") {
48			content, err := fs.ReadFile(files, path)
49			if err != nil {
50				return err
51			}
52
53			if err := Entities.UnmarshalJSON(content); err != nil {
54				return err
55			}
56		}
57
58		return nil
59	})
60
61	if err != nil {
62		Logger.Err(err)
63	}
64}
65
66func Allowed(request cedar.Request) bool {
67	ok, diagnostic := All.IsAuthorized(Entities, request)
68	fmt.Printf("%v: %v -> %v %v%v\n", ok, request.Principal, request.Action.ID, request.Context.Map(), request.Resource.ID)
69
70	if len(diagnostic.Errors) > 0 {
71		log.New(os.Stderr, log.Fields{"errors": diagnostic.Errors})
72		Logger.Error().Fields(log.Fields{"errors": diagnostic.Errors}.ToMap())
73	}
74	if len(diagnostic.Reasons) > 0 {
75		Logger.Warn().Fields(log.Fields{"reasons": diagnostic.Reasons}.ToMap())
76	}
77	return ok == types.Allow
78}