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Fix caching of initial unsplash results per page

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This commit is contained in:
kolaente 2020-05-31 18:09:46 +02:00
parent ad67154e26
commit 2fa4fcc202
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GPG key ID: F40E70337AB24C9B
1 changed files with 23 additions and 8 deletions
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31
pkg/modules/background/unsplash/unsplash.go
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@ -76,7 +76,9 @@ var photos map[string]*Photo
// user opens the settings page.
type initialCollection struct {
lastCached time.Time
images []*background.Image
// images contains a slice of images by page they belong to
// this allows us to cache individual pages.
images map[int64][]*background.Image
}
var emptySearchResult *initialCollection
@ -130,12 +132,19 @@ func (p *Provider) Search(search string, page int64) (result []*background.Image
// If we don't have a search query, return results from the unsplash featured collection
if search == "" {
if emptySearchResult != nil && time.Since(emptySearchResult.lastCached) < time.Minute {
log.Debugf("Serving intial unsplash collection from cache, last updated at %v", emptySearchResult.lastCached)
return emptySearchResult.images, nil
var existsForPage bool
if emptySearchResult != nil &&
time.Since(emptySearchResult.lastCached) < time.Minute {
_, existsForPage = emptySearchResult.images[page]
}
log.Debug("Retrieving initial unsplash collection from unsplash api")
if existsForPage {
log.Debugf("Serving intial unsplash collection for page %d from cache, last updated at %v", page, emptySearchResult.lastCached)
return emptySearchResult.images[page], nil
}
log.Debugf("Retrieving initial unsplash collection for page %d from unsplash api", page)
collectionResult := []*Photo{}
err = doGet("collections/317099/photos?page="+strconv.FormatInt(page, 10)+"&per_page=25&order_by=latest", &collectionResult)
@ -157,10 +166,16 @@ func (p *Provider) Search(search string, page int64) (result []*background.Image
photos[p.ID] = p
}
emptySearchResult = &initialCollection{
lastCached: time.Now(),
images: result,
// Put the collection in cache
if emptySearchResult == nil {
emptySearchResult = &initialCollection{
images: make(map[int64][]*background.Image),
}
}
emptySearchResult.lastCached = time.Now()
emptySearchResult.images[page] = result
return
}