IssueEvents: Support Project Card fields (google#1066)

Fixes google#1000.

Author: palash25

AUTHORS

@@ -155,6 +155,7 @@ Noah Zoschke <[email protected]>
 ns-cweber <[email protected]>
 Oleg Kovalov <[email protected]>
 Ondřej Kupka <[email protected]>
+Palash Nigam <[email protected]>
 Panagiotis Moustafellos <[email protected]>
 Parham Alvani <[email protected]>
 Parker Moore <[email protected]>

github/github-accessors.go

@@ -128,6 +128,9 @@ const (
 
 	// https://developer.github.com/changes/2018-02-22-protected-branches-required-signatures/
 	mediaTypeSignaturePreview = "application/vnd.github.zzzax-preview+json"
+
+	// https://developer.github.com/changes/2018-09-05-project-card-events/
+	mediaTypeProjectCardDetailsPreview = "application/vnd.github.starfox-preview+json"
 )
 
 // A Client manages communication with the GitHub API.

github/github.go

@@ -8,6 +8,7 @@ package github
 import (
 	"context"
 	"fmt"
+	"strings"
 	"time"
 )
 
@@ -68,13 +69,14 @@ type IssueEvent struct {
 	Issue     *Issue     `json:"issue,omitempty"`
 
 	// Only present on certain events; see above.
-	Assignee   *User      `json:"assignee,omitempty"`
-	Assigner   *User      `json:"assigner,omitempty"`
-	CommitID   *string    `json:"commit_id,omitempty"`
-	Milestone  *Milestone `json:"milestone,omitempty"`
-	Label      *Label     `json:"label,omitempty"`
-	Rename     *Rename    `json:"rename,omitempty"`
-	LockReason *string    `json:"lock_reason,omitempty"`
+	Assignee    *User        `json:"assignee,omitempty"`
+	Assigner    *User        `json:"assigner,omitempty"`
+	CommitID    *string      `json:"commit_id,omitempty"`
+	Milestone   *Milestone   `json:"milestone,omitempty"`
+	Label       *Label       `json:"label,omitempty"`
+	Rename      *Rename      `json:"rename,omitempty"`
+	LockReason  *string      `json:"lock_reason,omitempty"`
+	ProjectCard *ProjectCard `json:"project_card,omitempty"`
 }
 
 // ListIssueEvents lists events for the specified issue.
@@ -92,7 +94,8 @@ func (s *IssuesService) ListIssueEvents(ctx context.Context, owner, repo string,
 		return nil, nil, err
 	}
 
-	req.Header.Set("Accept", mediaTypeLockReasonPreview)
+	acceptHeaders := []string{mediaTypeLockReasonPreview, mediaTypeProjectCardDetailsPreview}
+	req.Header.Set("Accept", strings.Join(acceptHeaders, ", "))
 
 	var events []*IssueEvent
 	resp, err := s.client.Do(ctx, req, &events)