Basic timezone support.

Digests are generated for day boundaries in the given timezone, and timestamps
that are displayed are in that timezone too. No UI for actually specifying a
timezone.

app/account.go

@@ -3,6 +3,7 @@ package githop
 import (
 	"bytes"
 	"encoding/gob"
+	"time"
 
 	"appengine"
 	"appengine/datastore"
@@ -15,7 +16,9 @@ type Account struct {
 	// The datastore API doesn't store maps, and the token contains one. We
 	// thefore store a gob-serialized version instead.
 	OAuthTokenSerialized []byte
-	OAuthToken           oauth.Token `datastore:"-,"`
+	OAuthToken           oauth.Token    `datastore:"-,"`
+	TimezoneName         string         `datastore:",noindex"`
+	TimezoneLocation     *time.Location `datastore:"-,"`
 }
 
 func getAccount(c appengine.Context, gitHubUserId int) (*Account, error) {
@@ -25,9 +28,22 @@ func getAccount(c appengine.Context, gitHubUserId int) (*Account, error) {
 	if err != nil {
 		return nil, err
 	}
+
 	r := bytes.NewBuffer(account.OAuthTokenSerialized)
 	err = gob.NewDecoder(r).Decode(&account.OAuthToken)
-	return account, err
+	if err != nil {
+		return nil, err
+	}
+
+	if len(account.TimezoneName) == 0 {
+		account.TimezoneName = "America/Los_Angeles"
+	}
+	account.TimezoneLocation, err = time.LoadLocation(account.TimezoneName)
+	if err != nil {
+		return nil, err
+	}
+
+	return account, nil
 }
 
 func getAllAccounts(c appengine.Context, accounts *[]Account) error {

app/digest.go

@@ -14,11 +14,11 @@ type DigestCommit struct {
 	URL              string
 	Title            string
 	Message          string
-	Date             *time.Time
+	Date             time.Time
 	RepositoryCommit *github.RepositoryCommit
 }
 
-func newDigestCommit(commit *github.RepositoryCommit, repo *github.Repository) DigestCommit {
+func newDigestCommit(commit *github.RepositoryCommit, repo *github.Repository, location *time.Location) DigestCommit {
 	messagePieces := strings.SplitN(*commit.Commit.Message, "\n", 2)
 	title := messagePieces[0]
 	message := ""
@@ -30,11 +30,15 @@ func newDigestCommit(commit *github.RepositoryCommit, repo *github.Repository) D
 		URL:              fmt.Sprintf("https://github.com/%s/commit/%s", *repo.FullName, *commit.SHA),
 		Title:            title,
 		Message:          message,
-		Date:             commit.Commit.Author.Date,
+		Date:             commit.Commit.Author.Date.In(location),
 		RepositoryCommit: commit,
 	}
 }
 
+func (commit DigestCommit) DisplayDate() string {
+	return commit.Date.Format("3:04pm")
+}
+
 type RepoDigest struct {
 	Repo    *github.Repository
 	Commits []DigestCommit
@@ -48,13 +52,14 @@ func (a ByRepoFullName) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }
 func (a ByRepoFullName) Less(i, j int) bool { return *a[i].Repo.FullName < *a[j].Repo.FullName }
 
 type Digest struct {
-	User        *github.User
-	StartTime   time.Time
-	EndTime     time.Time
-	RepoDigests []*RepoDigest
+	User             *github.User
+	StartTime        time.Time
+	EndTime          time.Time
+	TimezoneLocation *time.Location
+	RepoDigests      []*RepoDigest
 }
 
-func newDigest(githubClient *github.Client) (*Digest, error) {
+func newDigest(githubClient *github.Client, account *Account) (*Digest, error) {
 	user, _, err := githubClient.Users.Get("")
 	if err != nil {
 		return nil, err
@@ -82,7 +87,7 @@ func newDigest(githubClient *github.Client) (*Digest, error) {
 		repos = newRepos
 	}
 
-	now := time.Now()
+	now := time.Now().In(account.TimezoneLocation)
 	digestStartTime := time.Date(now.Year()-1, now.Month(), now.Day(), 0, 0, 0, 0, now.Location())
 	digestEndTime := digestStartTime.AddDate(0, 0, 1)
 
@@ -95,10 +100,11 @@ func newDigest(githubClient *github.Client) (*Digest, error) {
 	}
 	repos = digestRepos
 	digest := &Digest{
-		User:        user,
-		RepoDigests: make([]*RepoDigest, 0, len(repos)),
-		StartTime:   digestStartTime,
-		EndTime:     digestEndTime,
+		User:             user,
+		RepoDigests:      make([]*RepoDigest, 0, len(repos)),
+		StartTime:        digestStartTime,
+		EndTime:          digestEndTime,
+		TimezoneLocation: account.TimezoneLocation,
 	}
 	err = digest.fetch(repos, githubClient)
 	return digest, err
@@ -125,7 +131,7 @@ func (digest *Digest) fetch(repos []github.Repository, githubClient *github.Clie
 			} else {
 				digestCommits := make([]DigestCommit, 0, len(commits))
 				for i, _ := range commits {
-					digestCommits = append(digestCommits, newDigestCommit(&commits[i], &repo))
+					digestCommits = append(digestCommits, newDigestCommit(&commits[i], &repo, digest.TimezoneLocation))
 				}
 				ch <- &RepoDigestResponse{&RepoDigest{&repo, digestCommits}, nil}
 			}
@@ -145,3 +151,7 @@ func (digest *Digest) fetch(repos []github.Repository, githubClient *github.Clie
 	sort.Sort(ByRepoFullName(digest.RepoDigests))
 	return nil
 }
+
+func (digest *Digest) DisplayDate() string {
+	return digest.StartTime.Format("January 2, 2006 was a Monday")
+}

app/githop.go

@@ -102,7 +102,7 @@ func indexHandler(w http.ResponseWriter, r *http.Request) {
 	oauthTransport.Token = &account.OAuthToken
 	githubClient := github.NewClient(oauthTransport.Client())
 
-	digest, err := newDigest(githubClient)
+	digest, err := newDigest(githubClient, account)
 	if err != nil {
 		http.Error(w, err.Error(), http.StatusInternalServerError)
 	}
@@ -159,7 +159,7 @@ func sendDigestForAccount(account *Account, c appengine.Context) error {
 	oauthTransport.Token = &account.OAuthToken
 	githubClient := github.NewClient(oauthTransport.Client())
 
-	digest, err := newDigest(githubClient)
+	digest, err := newDigest(githubClient, account)
 	if err != nil {
 		return err
 	}

app/templates/digest.html

@@ -2,7 +2,7 @@
 
 <dl>
 
-<p>Activity a year ago for <a href="https://github.com/{{.User.Login}}" title={{.User.Name}}><img src={{.User.AvatarURL}} width="20" height="20" border="0">{{.User.Login}}</a>.</p>
+<p>{{.DisplayDate}}. Here's the GitHub activity on that day for <a href="https://github.com/{{.User.Login}}" title={{.User.Name}}><img src={{.User.AvatarURL}} width="20" height="20" border="0">{{.User.Login}}</a>.</p>
 
 {{range $index, $repoDigest := .RepoDigests}}
   <h2>
@@ -20,7 +20,7 @@
         {{end}}
         <div>
           <a href="{{.URL}}">{{.DisplaySHA}}</a>
-          <i>{{.Date}}</i>
+          <i>{{.DisplayDate}}</i>
         </div>
       </div>
     {{end}}