48 lines
1.0 KiB
Go
48 lines
1.0 KiB
Go
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package timeline
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import (
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"container/list"
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"errors"
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"time"
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)
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type postIndex struct {
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data *list.List
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}
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type postIndexEntry struct {
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createdAt time.Time
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statusID string
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}
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func (p *postIndex) index(i *postIndexEntry) error {
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if p.data == nil {
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p.data = &list.List{}
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}
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// if we have no entries yet, this is both the newest and oldest entry, so just put it in the front
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if p.data.Len() == 0 {
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p.data.PushFront(i)
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return nil
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}
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// we need to iterate through the index to make sure we put this post in the appropriate place according to when it was created
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for e := p.data.Front(); e != nil; e = e.Next() {
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entry, ok := e.Value.(*postIndexEntry)
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if !ok {
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return errors.New("Remove: could not parse e as a postIndexEntry")
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}
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// if the post to index is newer than e, insert it before e in the list
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if i.createdAt.After(entry.createdAt) {
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p.data.InsertBefore(i, e)
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return nil
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}
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}
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// if we reach this point it's the oldest post we've seen so put it at the back
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p.data.PushBack(i)
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return nil
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}
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