59 lines
1.4 KiB
Go
59 lines
1.4 KiB
Go
// Copyright 2023 Woodpecker Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package utils
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// Paginate iterates over a func call until it does not return new items and return it as list.
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func Paginate[T any](get func(page int) ([]T, error), limit int) ([]T, error) {
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items := make([]T, 0, 10)
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page := 1
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lenFirstBatch := -1
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for {
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// limit < 1 means get all results
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remaining := 0
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if limit > 0 {
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remaining = limit - len(items)
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if remaining <= 0 {
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break
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}
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}
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batch, err := get(page)
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if err != nil {
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return nil, err
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}
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// Take only what we need from this batch if limit > 0
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if limit > 0 && len(batch) > remaining {
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batch = batch[:remaining]
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}
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items = append(items, batch...)
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if page == 1 {
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if len(batch) == 0 {
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return items, nil
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}
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lenFirstBatch = len(batch)
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} else if len(batch) < lenFirstBatch || len(batch) == 0 {
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break
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}
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page++
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}
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return items, nil
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}
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