Rewrite identity and access management

Signed-off-by: Bryan Frimin <bryan@getprobo.com>

pkg/iam/saml/errors.go

@@ -0,0 +1,90 @@
+// Copyright (c) 2025 Probo Inc <hello@getprobo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+package saml
+
+import (
+	"fmt"
+
+	"go.probo.inc/probo/pkg/gid"
+	"go.probo.inc/probo/pkg/mail"
+)
+
+type ErrSAMLConfigurationNotFound struct{ ConfigID gid.GID }
+
+func NewSAMLConfigurationNotFoundError(configID gid.GID) error {
+	return &ErrSAMLConfigurationNotFound{ConfigID: configID}
+}
+
+func (e ErrSAMLConfigurationNotFound) Error() string {
+	return fmt.Sprintf("SAML configuration %q not found", e.ConfigID)
+}
+
+type ErrSAMLDisabled struct{}
+
+func NewSAMLDisabledError() error {
+	return &ErrSAMLDisabled{}
+}
+
+func (e ErrSAMLDisabled) Error() string {
+	return "SAML is disabled for this organization"
+}
+
+type ErrInvalidAssertion struct {
+	AssertionID string
+	Err         error
+}
+
+func NewInvalidAssertionError(assertionID string, err error) error {
+	return &ErrInvalidAssertion{AssertionID: assertionID, Err: err}
+}
+
+func (e ErrInvalidAssertion) Error() string {
+	return fmt.Sprintf("invalid assertion %q: %v", e.AssertionID, e.Err)
+}
+
+type ErrReplayAttackDetected struct {
+	AssertionID string
+}
+
+func NewReplayAttackDetectedError(assertionID string) error {
+	return &ErrReplayAttackDetected{AssertionID: assertionID}
+}
+
+func (e ErrReplayAttackDetected) Error() string {
+	return fmt.Sprintf("replay attack detected for assertion %q", e.AssertionID)
+}
+
+type ErrEmailDomainMismatch struct {
+	Email          mail.Addr
+	ExpectedDomain string
+}
+
+func NewEmailDomainMismatchError(email mail.Addr, expectedDomain string) error {
+	return &ErrEmailDomainMismatch{Email: email, ExpectedDomain: expectedDomain}
+}
+
+func (e ErrEmailDomainMismatch) Error() string {
+	return fmt.Sprintf("email domain mismatch: assertion contains email %q but SAML config is for domain %q", e.Email, e.ExpectedDomain)
+}
+
+type ErrSAMLAutoSignupDisabled struct{ ConfigID gid.GID }
+
+func NewSAMLAutoSignupDisabledError(configID gid.GID) error {
+	return &ErrSAMLAutoSignupDisabled{ConfigID: configID}
+}
+
+func (e ErrSAMLAutoSignupDisabled) Error() string {
+	return fmt.Sprintf("SAML auto-signup is disabled for configuration %q", e.ConfigID)
+}