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Create an internal delegate class to ensure log folder exists before …
…each operation.
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107 changes: 107 additions & 0 deletions
107
src/commonMain/kotlin/com/airthings/lib/logging/platform/DelegateFileInputOutput.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,107 @@ | ||
| /* | ||
| * Copyright 2024 Airthings ASA. All rights reserved. | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a copy of this software | ||
| * and associated documentation files (the “Software”), to deal in the Software without | ||
| * restriction, including without limitation the rights to use, copy, modify, merge, publish, | ||
| * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the | ||
| * Software is furnished to do so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included in all copies or | ||
| * substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING | ||
| * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | ||
| * NON-INFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, | ||
| * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | ||
| */ | ||
|
|
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| package com.airthings.lib.logging.platform | ||
|
|
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| import com.airthings.lib.logging.LogDate | ||
| import com.airthings.lib.logging.LogFolderMissingHandler | ||
|
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| internal class DelegateFileInputOutput( | ||
| private val folder: String, | ||
| private val io: PlatformFileInputOutput, | ||
| private val onFolderMissing: LogFolderMissingHandler? = null, | ||
| ) : PlatformFileInputOutput { | ||
| override val pathSeparator: Char = io.pathSeparator | ||
|
|
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| override suspend fun mkdirs(path: String): Boolean = ensureDir { | ||
| mkdirs(path) | ||
| } | ||
|
|
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| override suspend fun size(path: String): Long = ensureDir { | ||
| size(path) | ||
| } | ||
|
|
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| override suspend fun write( | ||
| path: String, | ||
| position: Long, | ||
| contents: String, | ||
| ) = ensureDir { | ||
| write( | ||
| path = path, | ||
| position = position, | ||
| contents = contents, | ||
| ) | ||
| } | ||
|
|
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| override suspend fun append( | ||
| path: String, | ||
| contents: String, | ||
| ) = ensureDir { | ||
| append( | ||
| path = path, | ||
| contents = contents, | ||
| ) | ||
| } | ||
|
|
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| override suspend fun ensure(path: String) = ensureDir { | ||
| ensure(path) | ||
| } | ||
|
|
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| override suspend fun delete(path: String) = ensureDir { | ||
| delete(path) | ||
| } | ||
|
|
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| override suspend fun of(path: String): Collection<String> = ensureDir { | ||
| of(path) | ||
| } | ||
|
|
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| override suspend fun of( | ||
| path: String, | ||
| date: LogDate, | ||
| ): Collection<String> = ensureDir { | ||
| of( | ||
| path = path, | ||
| date = date, | ||
| ) | ||
| } | ||
|
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| private suspend fun <T> ensureDir( | ||
| action: suspend PlatformFileInputOutput.() -> T, | ||
| ): T = with(io) { | ||
| val isDirectoryExists = mkdirs(folder) | ||
| try { | ||
| io.action() | ||
| } finally { | ||
| if (!isDirectoryExists) { | ||
| onFolderMissing?.invoke(folder) | ||
| } | ||
| } | ||
| } | ||
|
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| companion object { | ||
| /** | ||
| * Default handler when a folder is invalid. | ||
| * | ||
| * @param folder The invalid folder's path. | ||
| */ | ||
| fun reportMissingFolder(folder: String) { | ||
| throw IllegalStateException("Log folder is invalid: $folder") | ||
| } | ||
| } | ||
| } |
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