113 lines
2.8 KiB
Go
113 lines
2.8 KiB
Go
// Copyright (c) 2026 Probo Inc <hello@getprobo.com>.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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// PERFORMANCE OF THIS SOFTWARE.
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package session
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import (
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"bytes"
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"context"
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"fmt"
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"io"
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"strconv"
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"github.com/99designs/gqlgen/graphql"
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"go.probo.inc/probo/pkg/server/api/authn"
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"go.probo.inc/probo/pkg/server/gqlutils"
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)
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type SessionRequirement string
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const (
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SessionRequirementPresent SessionRequirement = "PRESENT"
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SessionRequirementNone SessionRequirement = "NONE"
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SessionRequirementOptional SessionRequirement = "OPTIONAL"
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)
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var AllSessionRequirement = []SessionRequirement{
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SessionRequirementPresent,
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SessionRequirementNone,
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SessionRequirementOptional,
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}
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func (e SessionRequirement) IsValid() bool {
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switch e {
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case SessionRequirementPresent, SessionRequirementNone, SessionRequirementOptional:
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return true
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}
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return false
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}
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func (e SessionRequirement) String() string {
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return string(e)
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}
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func (e *SessionRequirement) UnmarshalGQL(v any) error {
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str, ok := v.(string)
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if !ok {
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return fmt.Errorf("enums must be strings")
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}
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*e = SessionRequirement(str)
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if !e.IsValid() {
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return fmt.Errorf("%s is not a valid SessionRequirement", str)
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}
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return nil
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}
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func (e SessionRequirement) MarshalGQL(w io.Writer) {
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_, _ = fmt.Fprint(w, strconv.Quote(e.String()))
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}
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func (e *SessionRequirement) UnmarshalJSON(b []byte) error {
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s, err := strconv.Unquote(string(b))
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if err != nil {
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return err
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}
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return e.UnmarshalGQL(s)
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}
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func (e SessionRequirement) MarshalJSON() ([]byte, error) {
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var buf bytes.Buffer
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e.MarshalGQL(&buf)
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return buf.Bytes(), nil
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}
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func Directive(ctx context.Context, obj any, next graphql.Resolver, required SessionRequirement) (any, error) {
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identity := authn.IdentityFromContext(ctx)
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switch required {
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case SessionRequirementOptional:
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case SessionRequirementPresent:
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if identity == nil {
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return nil, gqlutils.Unauthenticatedf(
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ctx,
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"authentication is required to access this resource",
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)
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}
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case SessionRequirementNone:
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if identity != nil {
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return nil, gqlutils.AlreadyAuthenticatedf(
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ctx,
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"authentication not allowed for this resource/action",
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)
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}
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}
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return next(ctx)
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}
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