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Improve OPML package to be more idiomatic

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This commit is contained in:
Frédéric Guillot 2017-11-20 19:11:06 -08:00
parent e91a9b4f13
commit c26787f476
7 changed files with 50 additions and 40 deletions
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39
reader/opml/handler.go
View file

@ -7,21 +7,24 @@ package opml
import (
"errors"
"fmt"
"github.com/miniflux/miniflux2/model"
"github.com/miniflux/miniflux2/storage"
"io"
"log"
"github.com/miniflux/miniflux2/model"
"github.com/miniflux/miniflux2/storage"
)
type OpmlHandler struct {
// Handler handles the logic for OPML import/export.
type Handler struct {
store *storage.Storage
}
func (o *OpmlHandler) Export(userID int64) (string, error) {
feeds, err := o.store.GetFeeds(userID)
// Export exports user feeds to OPML.
func (h *Handler) Export(userID int64) (string, error) {
feeds, err := h.store.GetFeeds(userID)
if err != nil {
log.Println(err)
return "", errors.New("Unable to fetch feeds.")
return "", errors.New("unable to fetch feeds")
}
var subscriptions SubcriptionList
@ -37,27 +40,28 @@ func (o *OpmlHandler) Export(userID int64) (string, error) {
return Serialize(subscriptions), nil
}
func (o *OpmlHandler) Import(userID int64, data io.Reader) (err error) {
// Import parses and create feeds from an OPML import.
func (h *Handler) Import(userID int64, data io.Reader) (err error) {
subscriptions, err := Parse(data)
if err != nil {
return err
}
for _, subscription := range subscriptions {
if !o.store.FeedURLExists(userID, subscription.FeedURL) {
if !h.store.FeedURLExists(userID, subscription.FeedURL) {
var category *model.Category
if subscription.CategoryName == "" {
category, err = o.store.GetFirstCategory(userID)
category, err = h.store.GetFirstCategory(userID)
if err != nil {
log.Println(err)
return errors.New("Unable to find first category.")
return errors.New("unable to find first category")
}
} else {
category, err = o.store.GetCategoryByTitle(userID, subscription.CategoryName)
category, err = h.store.GetCategoryByTitle(userID, subscription.CategoryName)
if err != nil {
log.Println(err)
return errors.New("Unable to search category by title.")
return errors.New("unable to search category by title")
}
if category == nil {
@ -66,10 +70,10 @@ func (o *OpmlHandler) Import(userID int64, data io.Reader) (err error) {
Title: subscription.CategoryName,
}
err := o.store.CreateCategory(category)
err := h.store.CreateCategory(category)
if err != nil {
log.Println(err)
return fmt.Errorf(`Unable to create this category: "%s".`, subscription.CategoryName)
return fmt.Errorf(`unable to create this category: "%s"`, subscription.CategoryName)
}
}
}
@ -82,13 +86,14 @@ func (o *OpmlHandler) Import(userID int64, data io.Reader) (err error) {
Category: category,
}
o.store.CreateFeed(feed)
h.store.CreateFeed(feed)
}
}
return nil
}
func NewOpmlHandler(store *storage.Storage) *OpmlHandler {
return &OpmlHandler{store: store}
// NewHandler creates a new handler for OPML files.
func NewHandler(store *storage.Storage) *Handler {
return &Handler{store: store}
}

18
reader/opml/opml.go
View file

@ -6,21 +6,21 @@ package opml
import "encoding/xml"
type Opml struct {
type opml struct {
XMLName xml.Name `xml:"opml"`
Version string `xml:"version,attr"`
Outlines []Outline `xml:"body>outline"`
Outlines []outline `xml:"body>outline"`
}
type Outline struct {
type outline struct {
Title string `xml:"title,attr,omitempty"`
Text string `xml:"text,attr"`
FeedURL string `xml:"xmlUrl,attr,omitempty"`
SiteURL string `xml:"htmlUrl,attr,omitempty"`
Outlines []Outline `xml:"outline,omitempty"`
Outlines []outline `xml:"outline,omitempty"`
}
func (o *Outline) GetTitle() string {
func (o *outline) GetTitle() string {
if o.Title != "" {
return o.Title
}
@ -40,7 +40,7 @@ func (o *Outline) GetTitle() string {
return ""
}
func (o *Outline) GetSiteURL() string {
func (o *outline) GetSiteURL() string {
if o.SiteURL != "" {
return o.SiteURL
}
@ -48,11 +48,11 @@ func (o *Outline) GetSiteURL() string {
return o.FeedURL
}
func (o *Outline) IsCategory() bool {
func (o *outline) IsCategory() bool {
return o.Text != "" && o.SiteURL == "" && o.FeedURL == ""
}
func (o *Outline) Append(subscriptions SubcriptionList, category string) SubcriptionList {
func (o *outline) Append(subscriptions SubcriptionList, category string) SubcriptionList {
if o.FeedURL != "" {
subscriptions = append(subscriptions, &Subcription{
Title: o.GetTitle(),
@ -65,7 +65,7 @@ func (o *Outline) Append(subscriptions SubcriptionList, category string) Subcrip
return subscriptions
}
func (o *Opml) Transform() SubcriptionList {
func (o *opml) Transform() SubcriptionList {
var subscriptions SubcriptionList
for _, outline := range o.Outlines {

6
reader/opml/parser.go
View file

@ -14,14 +14,14 @@ import (
// Parse reads an OPML file and returns a SubcriptionList.
func Parse(data io.Reader) (SubcriptionList, error) {
opml := new(Opml)
feeds := new(opml)
decoder := xml.NewDecoder(data)
decoder.CharsetReader = charset.NewReaderLabel
err := decoder.Decode(opml)
err := decoder.Decode(feeds)
if err != nil {
return nil, errors.NewLocalizedError("Unable to parse OPML file: %v.", err)
}
return opml.Transform(), nil
return feeds.Transform(), nil
}

12
reader/opml/serializer.go
View file

@ -17,13 +17,13 @@ func Serialize(subscriptions SubcriptionList) string {
writer := bufio.NewWriter(&b)
writer.WriteString(xml.Header)
opml := new(Opml)
opml.Version = "2.0"
feeds := new(opml)
feeds.Version = "2.0"
for categoryName, subs := range groupSubscriptionsByFeed(subscriptions) {
outline := Outline{Text: categoryName}
category := outline{Text: categoryName}
for _, subscription := range subs {
outline.Outlines = append(outline.Outlines, Outline{
category.Outlines = append(category.Outlines, outline{
Title: subscription.Title,
Text: subscription.Title,
FeedURL: subscription.FeedURL,
@ -31,12 +31,12 @@ func Serialize(subscriptions SubcriptionList) string {
})
}
opml.Outlines = append(opml.Outlines, outline)
feeds.Outlines = append(feeds.Outlines, category)
}
encoder := xml.NewEncoder(writer)
encoder.Indent(" ", " ")
if err := encoder.Encode(opml); err != nil {
if err := encoder.Encode(feeds); err != nil {
log.Println(err)
return ""
}

6
reader/opml/subscription.go
View file

@ -4,6 +4,7 @@
package opml
// Subcription represents a feed that will be imported or exported.
type Subcription struct {
Title string
SiteURL string
@ -11,8 +12,11 @@ type Subcription struct {
CategoryName string
}
// Equals compare two subscriptions.
func (s Subcription) Equals(subscription *Subcription) bool {
return s.Title == subscription.Title && s.SiteURL == subscription.SiteURL && s.FeedURL == subscription.FeedURL && s.CategoryName == subscription.CategoryName
return s.Title == subscription.Title && s.SiteURL == subscription.SiteURL &&
s.FeedURL == subscription.FeedURL && s.CategoryName == subscription.CategoryName
}
// SubcriptionList is a list of subscriptions.
type SubcriptionList []*Subcription