Add evidence state history

Signed-off-by: gearnode <bryan@frimin.fr>

pkg/api/console/v1/schema.graphql

@@ -249,6 +249,14 @@ type Evidence implements Node {
   id: ID!
   fileUrl: String!
   state: EvidenceState!
+
+  stateTransisions(
+    first: Int
+    after: CursorKey
+    last: Int
+    before: CursorKey
+  ): EvidenceStateTransitionConnection! @goField(forceResolver: true)
+
   createdAt: Datetime!
   updatedAt: Datetime!
 }
@@ -256,3 +264,22 @@ type Evidence implements Node {
 type Query {
   node(id: ID!): Node!
 }
+
+type EvidenceStateTransitionConnection {
+  edges: [EvidenceStateTransitionEdge!]!
+  pageInfo: PageInfo!
+}
+
+type EvidenceStateTransitionEdge {
+  cursor: CursorKey!
+  node: EvidenceStateTransition!
+}
+
+type EvidenceStateTransition {
+  id: ID!
+  fromState: EvidenceState
+  toState: EvidenceState!
+  reason: String
+  createdAt: Datetime!
+  updatedAt: Datetime!
+}

pkg/api/console/v1/types/evidence_state_transition.go

@@ -0,0 +1,59 @@
+// 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 types
+
+import (
+	"github.com/getprobo/probo/pkg/probo/coredata"
+	"github.com/getprobo/probo/pkg/probo/coredata/page"
+)
+
+func NewEvidenceStateTransitionConnection(
+	p *page.Page[*coredata.EvidenceStateTransition],
+) *EvidenceStateTransitionConnection {
+	var edges = make([]*EvidenceStateTransitionEdge, len(p.Data))
+
+	for i := range edges {
+		edges[i] = NewEvidenceStateTransitionEdge(p.Data[i])
+	}
+
+	return &EvidenceStateTransitionConnection{
+		Edges:    edges,
+		PageInfo: NewPageInfo(p),
+	}
+}
+
+func NewEvidenceStateTransitionEdge(est *coredata.EvidenceStateTransition) *EvidenceStateTransitionEdge {
+	return &EvidenceStateTransitionEdge{
+		Cursor: est.CursorKey(),
+		Node:   NewEvidenceStateTransition(est),
+	}
+}
+
+func NewEvidenceStateTransition(est *coredata.EvidenceStateTransition) *EvidenceStateTransition {
+	var fromState *EvidenceState
+	if est.FromState != nil {
+		val := EvidenceState((*est.FromState).String())
+		fromState = &val
+	}
+
+	return &EvidenceStateTransition{
+		ID:        est.ID,
+		FromState: fromState,
+		ToState:   EvidenceState(est.ToState.String()),
+		Reason:    est.Reason,
+		CreatedAt: est.CreatedAt,
+		UpdatedAt: est.UpdatedAt,
+	}
+}

pkg/api/console/v1/types/types.go

@@ -61,11 +61,12 @@ type ControlStateTransitionEdge struct {
 }
 
 type Evidence struct {
-	ID        gid.GID       `json:"id"`
-	FileURL   string        `json:"fileUrl"`
-	State     EvidenceState `json:"state"`
-	CreatedAt time.Time     `json:"createdAt"`
-	UpdatedAt time.Time     `json:"updatedAt"`
+	ID               gid.GID                            `json:"id"`
+	FileURL          string                             `json:"fileUrl"`
+	State            EvidenceState                      `json:"state"`
+	StateTransisions *EvidenceStateTransitionConnection `json:"stateTransisions"`
+	CreatedAt        time.Time                          `json:"createdAt"`
+	UpdatedAt        time.Time                          `json:"updatedAt"`
 }
 
 func (Evidence) IsNode()             {}
@@ -81,6 +82,25 @@ type EvidenceEdge struct {
 	Node   *Evidence      `json:"node"`
 }
 
+type EvidenceStateTransition struct {
+	ID        gid.GID        `json:"id"`
+	FromState *EvidenceState `json:"fromState,omitempty"`
+	ToState   EvidenceState  `json:"toState"`
+	Reason    *string        `json:"reason,omitempty"`
+	CreatedAt time.Time      `json:"createdAt"`
+	UpdatedAt time.Time      `json:"updatedAt"`
+}
+
+type EvidenceStateTransitionConnection struct {
+	Edges    []*EvidenceStateTransitionEdge `json:"edges"`
+	PageInfo *PageInfo                      `json:"pageInfo"`
+}
+
+type EvidenceStateTransitionEdge struct {
+	Cursor page.CursorKey           `json:"cursor"`
+	Node   *EvidenceStateTransition `json:"node"`
+}
+
 type Framework struct {
 	ID          gid.GID            `json:"id"`
 	Name        string             `json:"name"`

pkg/api/console/v1/v1_resolver.go

@@ -40,6 +40,18 @@ func (r *controlResolver) Tasks(ctx context.Context, obj *types.Control, first *
 	return types.NewTaskConnection(page), nil
 }
 
+// StateTransisions is the resolver for the stateTransisions field.
+func (r *evidenceResolver) StateTransisions(ctx context.Context, obj *types.Evidence, first *int, after *page.CursorKey, last *int, before *page.CursorKey) (*types.EvidenceStateTransitionConnection, error) {
+	cursor := types.NewCursor(first, after, last, before)
+
+	page, err := r.svc.ListEvidenceStateTransitions(ctx, obj.ID, cursor)
+	if err != nil {
+		return nil, fmt.Errorf("cannot list evidence state transitions: %w", err)
+	}
+
+	return types.NewEvidenceStateTransitionConnection(page), nil
+}
+
 // Controls is the resolver for the controls field.
 func (r *frameworkResolver) Controls(ctx context.Context, obj *types.Framework, first *int, after *page.CursorKey, last *int, before *page.CursorKey) (*types.ControlConnection, error) {
 	cursor := types.NewCursor(first, after, last, before)
@@ -131,6 +143,9 @@ func (r *taskResolver) Evidences(ctx context.Context, obj *types.Task, first *in
 // Control returns schema.ControlResolver implementation.
 func (r *Resolver) Control() schema.ControlResolver { return &controlResolver{r} }
 
+// Evidence returns schema.EvidenceResolver implementation.
+func (r *Resolver) Evidence() schema.EvidenceResolver { return &evidenceResolver{r} }
+
 // Framework returns schema.FrameworkResolver implementation.
 func (r *Resolver) Framework() schema.FrameworkResolver { return &frameworkResolver{r} }
 
@@ -144,6 +159,7 @@ func (r *Resolver) Query() schema.QueryResolver { return &queryResolver{r} }
 func (r *Resolver) Task() schema.TaskResolver { return &taskResolver{r} }
 
 type controlResolver struct{ *Resolver }
+type evidenceResolver struct{ *Resolver }
 type frameworkResolver struct{ *Resolver }
 type organizationResolver struct{ *Resolver }
 type queryResolver struct{ *Resolver }

pkg/probo/probo.go

@@ -284,3 +284,30 @@ func (s Service) ListTaskStateTransitions(
 
 	return page.NewPage(taskStateTransitions, cursor), nil
 }
+
+func (s Service) ListEvidenceStateTransitions(
+	ctx context.Context,
+	evidenceID gid.GID,
+	cursor *page.Cursor,
+) (*page.Page[*coredata.EvidenceStateTransition], error) {
+	var evidenceStateTransitions coredata.EvidenceStateTransitions
+
+	err := s.pg.WithConn(
+		ctx,
+		func(conn pg.Conn) error {
+			return evidenceStateTransitions.LoadByEvidenceID(
+				ctx,
+				conn,
+				s.scope,
+				evidenceID,
+				cursor,
+			)
+		},
+	)
+
+	if err != nil {
+		return nil, err
+	}
+
+	return page.NewPage(evidenceStateTransitions, cursor), nil
+}