First implementation of offline PWA

internal/database/migrations.go

@@ -903,4 +903,9 @@ var migrations = []func(tx *sql.Tx) error{
 		_, err = tx.Exec(sql)
 		return err
 	},
+	func(tx *sql.Tx) (err error) {
+		sql := `ALTER TABLE users ADD COLUMN cache_for_offline boolean default 'f'`
+		_, err = tx.Exec(sql)
+		return err
+	},
 }

internal/locale/translations/en_US.json

@@ -377,6 +377,7 @@
     "form.prefs.label.default_home_page": "Default home page",
     "form.prefs.label.categories_sorting_order": "Categories sorting",
     "form.prefs.label.mark_read_on_view": "Automatically mark entries as read when viewed",
+    "form.prefs.label.cache_for_offline": "Cache entries for offline reading",
     "form.prefs.fieldset.application_settings": "Application Settings",
     "form.prefs.fieldset.authentication_settings": "Authentication Settings",
     "form.prefs.fieldset.reader_settings": "Reader Settings",

internal/model/user.go

@@ -36,6 +36,7 @@ type User struct {
 	CategoriesSortingOrder string     `json:"categories_sorting_order"`
 	MarkReadOnView         bool       `json:"mark_read_on_view"`
 	MediaPlaybackRate      float64    `json:"media_playback_rate"`
+	CacheForOffline        bool       `json:"cache_for_offline"`
 }
 
 // UserCreationRequest represents the request to create a user.
@@ -72,6 +73,7 @@ type UserModificationRequest struct {
 	CategoriesSortingOrder *string  `json:"categories_sorting_order"`
 	MarkReadOnView         *bool    `json:"mark_read_on_view"`
 	MediaPlaybackRate      *float64 `json:"media_playback_rate"`
+	CacheForOffline        bool     `json:"cache_for_offline"`
 }
 
 // Patch updates the User object with the modification request.
@@ -167,6 +169,10 @@ func (u *UserModificationRequest) Patch(user *User) {
 	if u.MediaPlaybackRate != nil {
 		user.MediaPlaybackRate = *u.MediaPlaybackRate
 	}
+
+	if u.CacheForOffline {
+		user.CacheForOffline = u.CacheForOffline
+	}
 }
 
 // UseTimezone converts last login date to the given timezone.

internal/storage/user.go

@@ -92,7 +92,8 @@ func (s *Storage) CreateUser(userCreationRequest *model.UserCreationRequest) (*m
 			default_home_page,
 			categories_sorting_order,
 			mark_read_on_view,
-			media_playback_rate
+			media_playback_rate,
+			cache_for_offline
 	`
 
 	tx, err := s.db.Begin()
@@ -132,6 +133,7 @@ func (s *Storage) CreateUser(userCreationRequest *model.UserCreationRequest) (*m
 		&user.CategoriesSortingOrder,
 		&user.MarkReadOnView,
 		&user.MediaPlaybackRate,
+		&user.CacheForOffline,
 	)
 	if err != nil {
 		tx.Rollback()
@@ -189,9 +191,10 @@ func (s *Storage) UpdateUser(user *model.User) error {
 				default_home_page=$20,
 				categories_sorting_order=$21,
 				mark_read_on_view=$22,
-				media_playback_rate=$23
+				media_playback_rate=$23,
+				cache_for_offline=$24
 			WHERE
-				id=$24
+				id=$25
 		`
 
 		_, err = s.db.Exec(
@@ -219,6 +222,7 @@ func (s *Storage) UpdateUser(user *model.User) error {
 			user.CategoriesSortingOrder,
 			user.MarkReadOnView,
 			user.MediaPlaybackRate,
+			user.CacheForOffline,
 			user.ID,
 		)
 		if err != nil {
@@ -248,9 +252,10 @@ func (s *Storage) UpdateUser(user *model.User) error {
 				default_home_page=$19,
 				categories_sorting_order=$20,
 				mark_read_on_view=$21,
-				media_playback_rate=$22
+				media_playback_rate=$22,
+				cache_for_offline=$23
 			WHERE
-				id=$23
+				id=$24
 		`
 
 		_, err := s.db.Exec(
@@ -277,6 +282,7 @@ func (s *Storage) UpdateUser(user *model.User) error {
 			user.CategoriesSortingOrder,
 			user.MarkReadOnView,
 			user.MediaPlaybackRate,
+			user.CacheForOffline,
 			user.ID,
 		)
 
@@ -325,7 +331,8 @@ func (s *Storage) UserByID(userID int64) (*model.User, error) {
 			default_home_page,
 			categories_sorting_order,
 			mark_read_on_view,
-			media_playback_rate
+			media_playback_rate,
+			cache_for_offline
 		FROM
 			users
 		WHERE
@@ -361,7 +368,8 @@ func (s *Storage) UserByUsername(username string) (*model.User, error) {
 			default_home_page,
 			categories_sorting_order,
 			mark_read_on_view,
-			media_playback_rate
+			media_playback_rate,
+			cache_for_offline
 		FROM
 			users
 		WHERE
@@ -397,7 +405,8 @@ func (s *Storage) UserByField(field, value string) (*model.User, error) {
 			default_home_page,
 			categories_sorting_order,
 			mark_read_on_view,
-			media_playback_rate
+			media_playback_rate,
+			cache_for_offline
 		FROM
 			users
 		WHERE
@@ -440,7 +449,8 @@ func (s *Storage) UserByAPIKey(token string) (*model.User, error) {
 			u.default_home_page,
 			u.categories_sorting_order,
 			u.mark_read_on_view,
-			media_playback_rate
+			media_playback_rate,
+			u.cache_for_offline
 		FROM
 			users u
 		LEFT JOIN
@@ -478,6 +488,7 @@ func (s *Storage) fetchUser(query string, args ...interface{}) (*model.User, err
 		&user.CategoriesSortingOrder,
 		&user.MarkReadOnView,
 		&user.MediaPlaybackRate,
+		&user.CacheForOffline,
 	)
 
 	if err == sql.ErrNoRows {
@@ -586,7 +597,8 @@ func (s *Storage) Users() (model.Users, error) {
 			default_home_page,
 			categories_sorting_order,
 			mark_read_on_view,
-			media_playback_rate
+			media_playback_rate,
+			cache_for_offline
 		FROM
 			users
 		ORDER BY username ASC
@@ -625,6 +637,7 @@ func (s *Storage) Users() (model.Users, error) {
 			&user.CategoriesSortingOrder,
 			&user.MarkReadOnView,
 			&user.MediaPlaybackRate,
+			&user.CacheForOffline,
 		)
 
 		if err != nil {

internal/template/templates/views/settings.html

@@ -114,6 +114,7 @@ <h1 id="page-header-title">{{ t "page.settings.title" }}</h1>
         <label><input type="checkbox" name="show_reading_time" value="1" {{ if .form.ShowReadingTime }}checked{{ end }}> {{ t "form.prefs.label.show_reading_time" }}</label>
 
         <label><input type="checkbox" name="mark_read_on_view" value="1" {{ if .form.MarkReadOnView }}checked{{ end }}> {{ t "form.prefs.label.mark_read_on_view" }}</label>
+        <label><input type="checkbox" name="cache_for_offline" value="1" {{ if .form.CacheForOffline }}checked{{ end }}> {{ t "form.prefs.label.cache_for_offline" }}</label>
 
         <div class="buttons">
             <button type="submit" class="button button-primary" data-label-loading="{{ t "form.submit.saving" }}">{{ t "action.update" }}</button>

internal/ui/form/settings.go

@@ -34,6 +34,7 @@ type SettingsForm struct {
 	CategoriesSortingOrder string
 	MarkReadOnView         bool
 	MediaPlaybackRate      float64
+	CacheForOffline        bool
 }
 
 // Merge updates the fields of the given user.
@@ -57,6 +58,7 @@ func (s *SettingsForm) Merge(user *model.User) *model.User {
 	user.CategoriesSortingOrder = s.CategoriesSortingOrder
 	user.MarkReadOnView = s.MarkReadOnView
 	user.MediaPlaybackRate = s.MediaPlaybackRate
+	user.CacheForOffline = s.CacheForOffline
 
 	if s.Password != "" {
 		user.Password = s.Password
@@ -133,5 +135,6 @@ func NewSettingsForm(r *http.Request) *SettingsForm {
 		CategoriesSortingOrder: r.FormValue("categories_sorting_order"),
 		MarkReadOnView:         r.FormValue("mark_read_on_view") == "1",
 		MediaPlaybackRate:      mediaPlaybackRate,
+		CacheForOffline:        r.FormValue("cache_for_offline") == "1",
 	}
 }

internal/ui/settings_show.go

@@ -42,6 +42,7 @@ func (h *handler) showSettingsPage(w http.ResponseWriter, r *http.Request) {
 		CategoriesSortingOrder: user.CategoriesSortingOrder,
 		MarkReadOnView:         user.MarkReadOnView,
 		MediaPlaybackRate:      user.MediaPlaybackRate,
+		CacheForOffline:        user.CacheForOffline,
 	}
 
 	timezones, err := h.store.Timezones()