38 lines
818 B
Go
38 lines
818 B
Go
package playletser
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import (
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"videoweb/app/service/configser"
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)
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const homeAdsPerBlock = 2
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// AdSlice 从 detailbannerList 按偏移取 n 条；用尽后从头循环。仅做切片，不改字段名。
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func AdSlice(list []configser.Advertisement, offset, n int) []configser.Advertisement {
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ads := usableHomeAds(list)
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if len(ads) == 0 || n <= 0 {
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return nil
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}
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if offset < 0 {
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offset = 0
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}
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out := make([]configser.Advertisement, 0, n)
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for i := 0; i < n; i++ {
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out = append(out, ads[(offset+i)%len(ads)])
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}
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return out
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}
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func usableHomeAds(list []configser.Advertisement) []configser.Advertisement {
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if len(list) == 0 {
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return nil
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}
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out := make([]configser.Advertisement, 0, len(list))
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for _, item := range list {
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if item.Images == "" {
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continue
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}
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out = append(out, item)
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}
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return out
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}
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