72 lines
2 KiB
Go
72 lines
2 KiB
Go
// SPDX-FileCopyrightText: Copyright The Miniflux Authors. All rights reserved.
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// SPDX-License-Identifier: Apache-2.0
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package opml // import "miniflux.app/v2/internal/reader/opml"
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import (
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"bufio"
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"bytes"
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"encoding/xml"
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"log/slog"
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"sort"
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"time"
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)
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// Serialize returns a SubcriptionList in OPML format.
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func Serialize(subscriptions SubcriptionList) string {
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var b bytes.Buffer
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writer := bufio.NewWriter(&b)
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writer.WriteString(xml.Header)
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opmlDocument := convertSubscriptionsToOPML(subscriptions)
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encoder := xml.NewEncoder(writer)
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encoder.Indent("", " ")
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if err := encoder.Encode(opmlDocument); err != nil {
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slog.Error("Unable to serialize OPML document",
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slog.Any("error", err),
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)
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return ""
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}
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return b.String()
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}
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func convertSubscriptionsToOPML(subscriptions SubcriptionList) *opmlDocument {
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opmlDocument := NewOPMLDocument()
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opmlDocument.Version = "2.0"
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opmlDocument.Header.Title = "Miniflux"
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opmlDocument.Header.DateCreated = time.Now().Format("Mon, 02 Jan 2006 15:04:05 MST")
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groupedSubs := groupSubscriptionsByFeed(subscriptions)
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categories := make([]string, 0, len(groupedSubs))
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for k := range groupedSubs {
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categories = append(categories, k)
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}
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sort.Strings(categories)
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for _, categoryName := range categories {
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category := opmlOutline{Text: categoryName, Outlines: make(opmlOutlineCollection, 0, len(groupedSubs[categoryName]))}
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for _, subscription := range groupedSubs[categoryName] {
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category.Outlines = append(category.Outlines, opmlOutline{
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Title: subscription.Title,
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Text: subscription.Title,
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FeedURL: subscription.FeedURL,
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SiteURL: subscription.SiteURL,
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})
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}
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opmlDocument.Outlines = append(opmlDocument.Outlines, category)
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}
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return opmlDocument
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}
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func groupSubscriptionsByFeed(subscriptions SubcriptionList) map[string]SubcriptionList {
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groups := make(map[string]SubcriptionList)
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for _, subscription := range subscriptions {
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groups[subscription.CategoryName] = append(groups[subscription.CategoryName], subscription)
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}
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return groups
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}
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