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Michel Zimmer
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Oct 28, 2022
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84 changes: 84 additions & 0 deletions
84
src/main/scala/de/neuland/bandwhichd/server/domain/OsRelease.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| package de.neuland.bandwhichd.server.domain | ||
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| import scala.util.matching.Regex | ||
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| case class OsRelease( | ||
| maybeId: Option[OsRelease.Id], | ||
| maybeVersionId: Option[OsRelease.VersionId], | ||
| maybePrettyName: Option[OsRelease.PrettyName] | ||
| ) | ||
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| object OsRelease { | ||
| def apply(fileContents: FileContents): OsRelease = { | ||
| import de.neuland.bandwhichd.server.domain.OsRelease.FileContents.findValue | ||
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| OsRelease( | ||
| maybeId = fileContents.findValue("ID").map(Id.apply), | ||
| maybeVersionId = | ||
| fileContents.findValue("VERSION_ID").map(VersionId.apply), | ||
| maybePrettyName = | ||
| fileContents.findValue("PRETTY_NAME").map(PrettyName.apply) | ||
| ) | ||
| } | ||
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| opaque type FileContents = String | ||
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| object FileContents { | ||
| def apply(value: String): FileContents = value | ||
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| private val rowRegex = | ||
| """^ *([a-zA-Z]+[a-zA-Z0-9_]*) *= *(?:"([^"]*)"|([a-zA-Z0-9]+)) *$""".r | ||
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| extension (fileContents: FileContents) { | ||
| def value: String = fileContents | ||
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| def parse: OsRelease = OsRelease.apply(fileContents) | ||
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| def findValue(key: String): Option[String] = | ||
| fileContents.value | ||
| .split("\\n") | ||
| .to(LazyList) | ||
| .flatMap(rowRegex.findFirstMatchIn) | ||
| .flatMap(_ match | ||
| case Regex.Groups(foundKey, quotedValue, null) | ||
| if key.equalsIgnoreCase(foundKey) => | ||
| Some(quotedValue) | ||
| case Regex.Groups(foundKey, null, unquotedValue) | ||
| if key.equalsIgnoreCase(foundKey) => | ||
| Some(unquotedValue) | ||
| case _ => None | ||
| ) | ||
| .headOption | ||
| } | ||
| } | ||
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| opaque type Id = String | ||
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| object Id { | ||
| def apply(value: String): Id = value | ||
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| extension (id: Id) { | ||
| def value: String = id | ||
| } | ||
| } | ||
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| opaque type VersionId = String | ||
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| object VersionId { | ||
| def apply(value: String): VersionId = value | ||
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| extension (versionId: VersionId) { | ||
| def value: String = versionId | ||
| } | ||
| } | ||
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| opaque type PrettyName = String | ||
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| object PrettyName { | ||
| def apply(value: String): PrettyName = value | ||
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| extension (prettyName: PrettyName) { | ||
| def value: String = prettyName | ||
| } | ||
| } | ||
| } |
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