101 lines
2.1 KiB
Go
101 lines
2.1 KiB
Go
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package posts
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import "strings"
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// UpdateIndex updates a post's metadata in the blog index.
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func UpdateIndex(p *Post) error {
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idx, err := GetIndex()
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if err != nil {
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return err
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}
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return idx.Update(p)
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}
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// Index caches high level metadata about the blog's contents for fast access.
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type Index struct {
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Posts map[int]Post `json:"posts"`
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}
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// GetIndex loads the index, or rebuilds it first if it doesn't exist.
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func GetIndex() (*Index, error) {
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if !DB.Exists("blog/index") {
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index, err := RebuildIndex()
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return index, err
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}
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idx := &Index{}
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err := DB.Get("blog/index", &idx)
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return idx, err
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}
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// RebuildIndex builds the index from scratch.
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func RebuildIndex() (*Index, error) {
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idx := &Index{
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Posts: map[int]Post{},
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}
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entries, _ := DB.List("blog/posts")
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for _, doc := range entries {
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p := &Post{}
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err := DB.Get(doc, &p)
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if err != nil {
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return nil, err
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}
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idx.Update(p)
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}
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return idx, nil
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}
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// Update a blog's entry in the index.
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func (idx *Index) Update(p *Post) error {
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idx.Posts[p.ID] = Post{
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ID: p.ID,
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Title: p.Title,
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Fragment: p.Fragment,
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AuthorID: p.AuthorID,
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Privacy: p.Privacy,
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Tags: p.Tags,
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Created: p.Created,
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Updated: p.Updated,
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}
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err := DB.Commit("blog/index", idx)
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return err
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}
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// Delete a blog's entry from the index.
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func (idx *Index) Delete(p *Post) error {
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delete(idx.Posts, p.ID)
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return DB.Commit("blog/index", idx)
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}
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// CleanupFragments to clean up old URL fragments.
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func CleanupFragments() error {
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idx, err := GetIndex()
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if err != nil {
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return err
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}
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return idx.CleanupFragments()
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}
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// CleanupFragments to clean up old URL fragments.
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func (idx *Index) CleanupFragments() error {
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// Keep track of the active URL fragments so we can clean up orphans.
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fragments := map[string]struct{}{}
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for _, p := range idx.Posts {
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fragments[p.Fragment] = struct{}{}
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}
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// Clean up unused fragments.
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byFragment, err := DB.List("blog/fragments")
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for _, doc := range byFragment {
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parts := strings.Split(doc, "/")
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fragment := parts[len(parts)-1]
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if _, ok := fragments[fragment]; !ok {
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log.Debug("RebuildIndex() clean up old fragment '%s'", fragment)
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DB.Delete(doc)
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}
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}
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return err
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}
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