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filenames.go
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filenames.go
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// Licensed to NASA JPL under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. NASA JPL licenses this file to you under
// the Apache License, Version 2.0 (the "License"); you may
// not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
package datasetArchive
import (
"errors"
"fmt"
"path"
"sort"
"strings"
"time"
"github.com/pixlise/core/v4/core/utils"
)
// Implements functions that deal with file names or listings stored in S3
func getOrderedArchiveFiles(archivedFiles []string) ([]string, error) {
filesByTimeStamp := map[int]string{}
fileTimestamps := []string{}
if len(archivedFiles) > 0 {
// Form timestamp->file name map
for _, fileName := range archivedFiles {
_ /*expecting this to match already due to dir listing*/, timeStamp, err := DecodeArchiveFileName(fileName)
if err != nil {
return []string{}, err
}
filesByTimeStamp[timeStamp] = fileName
}
timeStamps := make([]int, 0, len(filesByTimeStamp))
for ts := range filesByTimeStamp {
timeStamps = append(timeStamps, ts)
}
sort.Ints(timeStamps)
for _, timeStamp := range timeStamps {
fileTimestamps = append(fileTimestamps, filesByTimeStamp[timeStamp])
}
}
return fileTimestamps, nil
}
func DecodeArchiveFileName(fileName string) (string, int, error) {
// We're expecting archived files to be named along the lines of: 161677829-12-06-2022-06-41-00.zip
// Where the first part is the dataset ID (hence the prefix above working to list them) and then a time stamp
splits := strings.SplitN(fileName, "-", 2)
if len(splits) != 2 {
return "", 0, errors.New("DecodeArchiveFileName unexpected file name: " + fileName)
}
// splits[0] is the dataset ID, splits[1] is "the rest"
datasetID := path.Base(splits[0]) // Just in case it's in a subdir of the bucket
// Remove file extension:
strTimestamp := splits[1]
ext := path.Ext(strTimestamp)
strTimestamp = strTimestamp[0 : len(strTimestamp)-len(ext)]
layout := "02-01-2006-15-04-05"
timestamp, err := time.Parse(layout, strTimestamp)
if err != nil {
return "", 0, fmt.Errorf("DecodeArchiveFileName \"%v\" error: %v", fileName, err)
}
return datasetID, int(utils.Abs(timestamp.Unix())), nil
}
// Expecting paths of the form: /dataset-addons/datasetID/custom-meta.json AND /dataset-addons/datasetID/MATCHED/something.png or .json
// Returns file name, type dir (MATCHED in above example) or error
func decodeManualUploadPath(filePath string) (string, []string, error) {
fileName := path.Base(filePath)
// If path starts with a /, skip that
filePath = strings.TrimLeft(filePath, "/")
pathParts := strings.Split(filePath, "/")
if len(pathParts) > 3 {
pathParts = pathParts[2 : len(pathParts)-1]
} else if len(pathParts) == 3 && pathParts[2] == "custom-meta.json" {
pathParts = pathParts[2 : len(pathParts)-1]
} else {
return "", []string{}, errors.New("Manual upload path invalid: " + filePath)
}
return fileName, pathParts, nil
}