mirror of
https://github.com/makew0rld/amfora.git
synced 2024-12-04 14:46:29 -05:00
1a2fba92c2
More info on corrupt reads and writes: https://github.com/makeworld-the-better-one/amfora/issues/61#issuecomment-735042805 The panic was occuring due to lines like: if u[:6] == "about:" These would cause panics for URIs that were shorter than 6, like "docs/". strings.HasPrefix was used instead to fix this.
109 lines
2.2 KiB
Go
109 lines
2.2 KiB
Go
package subscriptions
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import (
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"sync"
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"time"
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"github.com/mmcdole/gofeed"
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)
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/*
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Example stored JSON.
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{
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"feeds": {
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"url1": <gofeed.Feed>,
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"url2": <gofeed.Feed>,
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},
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"pages": {
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"url1": {
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"hash": <hash>,
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"changed": <time>
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},
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"url2": {
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"hash": <hash>,
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"changed": <time>
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}
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}
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}
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"pages" are the pages tracked for changes that aren't feeds.
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The hash used is SHA-256.
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The time is in RFC 3339 format, preferably in the UTC timezone.
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*/
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// Decoded JSON
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type jsonData struct {
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feedMu *sync.RWMutex
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pageMu *sync.RWMutex
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Feeds map[string]*gofeed.Feed `json:"feeds,omitempty"`
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Pages map[string]*pageJSON `json:"pages,omitempty"`
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}
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// Lock locks both feed and page mutexes.
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func (j *jsonData) Lock() {
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j.feedMu.Lock()
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j.pageMu.Lock()
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}
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// Unlock unlocks both feed and page mutexes.
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func (j *jsonData) Unlock() {
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j.feedMu.Unlock()
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j.pageMu.Unlock()
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}
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// RLock read-locks both feed and page mutexes.
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func (j *jsonData) RLock() {
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j.feedMu.RLock()
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j.pageMu.RLock()
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}
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// RUnlock read-unlocks both feed and page mutexes.
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func (j *jsonData) RUnlock() {
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j.feedMu.RUnlock()
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j.pageMu.RUnlock()
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}
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type pageJSON struct {
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Hash string `json:"hash"`
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Changed time.Time `json:"changed"` // When the latest change happened
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}
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// Global instance of jsonData - loaded from JSON and used
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var data = jsonData{
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feedMu: &sync.RWMutex{},
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pageMu: &sync.RWMutex{},
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// Maps are created in Init()
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}
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// PageEntry is a single item on a subscriptions page.
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// It is used for both feeds and pages.
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type PageEntry struct {
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Prefix string // Feed/log title, author, etc - something before the post title
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Title string
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URL string
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Published time.Time
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}
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// PageEntries is new-to-old list of Entry structs, used to create a
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// subscriptions page.
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// It should always be assumed to be sorted when used in other packages,
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// by post time, from newest to oldest.
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type PageEntries struct {
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Entries []*PageEntry
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}
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// Implement sort.Interface
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func (e *PageEntries) Len() int {
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return len(e.Entries)
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}
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func (e *PageEntries) Less(i, j int) bool {
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return e.Entries[i].Published.After(e.Entries[j].Published)
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}
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func (e *PageEntries) Swap(i, j int) {
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e.Entries[i], e.Entries[j] = e.Entries[j], e.Entries[i]
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}
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