Improve themes handling

- Store user theme in session
- Logged out users will keep their theme
- Add theme background color to web manifest and meta tag

1 files changed, 59 insertions, 0 deletions

diff --git a/model/app_session.go b/model/app_session.go
new file mode 100644
index 0000000..e9ee06e
--- /dev/null
+++ b/model/app_session.go
@@ -0,0 +1,59 @@
+// Copyright 2017 Frédéric Guillot. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+package model
+
+import (
+	"database/sql/driver"
+	"encoding/json"
+	"errors"
+	"fmt"
+)
+
+// SessionData represents the data attached to the session.
+type SessionData struct {
+	CSRF               string `json:"csrf"`
+	OAuth2State        string `json:"oauth2_state"`
+	FlashMessage       string `json:"flash_message"`
+	FlashErrorMessage  string `json:"flash_error_message"`
+	Language           string `json:"language"`
+	Theme              string `json:"Theme"`
+	PocketRequestToken string `json:"pocket_request_token"`
+}
+
+func (s SessionData) String() string {
+	return fmt.Sprintf(`CSRF=%q, "OAuth2State=%q, FlashMsg=%q, FlashErrorMsg=%q, Lang=%q, Theme=%q`,
+		s.CSRF, s.OAuth2State, s.FlashMessage, s.FlashErrorMessage, s.Language, s.Theme)
+}
+
+// Value converts the session data to JSON.
+func (s SessionData) Value() (driver.Value, error) {
+	j, err := json.Marshal(s)
+	return j, err
+}
+
+// Scan converts raw JSON data.
+func (s *SessionData) Scan(src interface{}) error {
+	source, ok := src.([]byte)
+	if !ok {
+		return errors.New("session: unable to assert type of src")
+	}
+
+	err := json.Unmarshal(source, s)
+	if err != nil {
+		return fmt.Errorf("session: %v", err)
+	}
+
+	return err
+}
+
+// Session represents a session in the system.
+type Session struct {
+	ID   string
+	Data *SessionData
+}
+
+func (s *Session) String() string {
+	return fmt.Sprintf(`ID="%s", Data={%v}`, s.ID, s.Data)
+}