From ef71e423414b2683290c5e5e6d88cc3079810a22 Mon Sep 17 00:00:00 2001
From: Christoph Hagen <github@christophhagen.de>
Date: Thu, 7 Sep 2023 16:06:35 +0200
Subject: [PATCH] Remove migration

---
 Package.swift               |   2 -
 Sources/App/configure.swift | 108 ------------------------------------
 Sources/Run/main.swift      |   7 ---
 3 files changed, 117 deletions(-)

diff --git a/Package.swift b/Package.swift
index 030677c..8f28cbd 100644
--- a/Package.swift
+++ b/Package.swift
@@ -11,7 +11,6 @@ let package = Package(
         .package(url: "https://github.com/christophhagen/Clairvoyant", from: "0.9.0"),
         .package(url: "https://github.com/christophhagen/ClairvoyantVapor", from: "0.2.0"),
         .package(url: "https://github.com/christophhagen/ClairvoyantBinaryCodable", from: "0.3.1"),
-        .package(url:"https://github.com/christophhagen/CBORCoding", from: "1.0.0"),
     ],
     targets: [
         .target(
@@ -21,7 +20,6 @@ let package = Package(
                 .product(name: "Clairvoyant", package: "Clairvoyant"),
                 .product(name: "ClairvoyantVapor", package: "ClairvoyantVapor"),
                 .product(name: "ClairvoyantBinaryCodable", package: "ClairvoyantBinaryCodable"),
-                .product(name: "CBORCoding", package: "CBORCoding")
             ],
             swiftSettings: [
                 // Enable better optimizations when building in Release configuration. Despite the use of
diff --git a/Sources/App/configure.swift b/Sources/App/configure.swift
index 1ee1cab..5b7f230 100755
--- a/Sources/App/configure.swift
+++ b/Sources/App/configure.swift
@@ -86,111 +86,3 @@ func log(_ message: String) {
     }
     observer.log(message)
 }
-
-import CBORCoding
-
-public func migrate(folder: URL) throws {
-    try migrateMetric("sesame.log", containing: String.self, in: folder)
-    try migrateMetric("sesame.status", containing: ServerStatus.self, in: folder)
-    try migrateMetric("sesame.connected", containing: Bool.self, in: folder)
-    try migrateMetric("sesame.messages", containing: Int.self, in: folder)
-}
-
-private func migrateMetric<T>(_ id: String, containing type: T.Type, in folder: URL) throws where T: MetricValue {
-    print("Processing metric \(id)")
-    let file = id.hashed()
-    let url = folder.appendingPathComponent(file)
-
-    let files = try FileManager.default.contentsOfDirectory(at: url, includingPropertiesForKeys: nil)
-        .filter { Int($0.lastPathComponent) != nil }
-    print("Found \(files.count) files for \(id)")
-
-    let all: [Timestamped<T>] = try files.map(readElements(from:))
-        .reduce([], +)
-        .sorted { $0.timestamp < $1.timestamp }
-
-    print("Found \(all.count) items for \(id)")
-
-    try FileManager.default.removeItem(at: url)
-
-    print("Removed log folder")
-
-    // TODO: Write values back to disk
-    let observer = MetricObserver(logFileFolder: folder, logMetricId: "sesame.migration")
-    let metric: Metric<T> = observer.addMetric(id: id)
-    private let semaphore = DispatchSemaphore(value: 0)
-    Task {
-        try await metric.update(all)
-        print("Saved all values for metric \(id)")
-        semaphore.signal()
-    }
-    semaphore.wait()
-    print("Finished metric \(id)")
-}
-
-private func readElements<T>(from url: URL) throws -> [Timestamped<T>] where T: MetricValue {
-    let data = try Data(contentsOf: url)
-    let file = url.lastPathComponent
-    print("File \(file): Loaded \(data.count) bytes")
-
-
-
-    let decoder = CBORDecoder()
-    let timestampLength = 9
-    let byteCountLength = 2
-
-    var result: [Timestamped<T>] = []
-    var currentIndex = data.startIndex
-    var skippedValues = 0
-    while currentIndex < data.endIndex {
-        let startIndexOfTimestamp = currentIndex + byteCountLength
-        guard startIndexOfTimestamp <= data.endIndex else {
-            print("File \(file): Only \(data.endIndex - currentIndex) bytes, needed \(byteCountLength) for byte count")
-            throw MetricError.logFileCorrupted
-        }
-        guard let byteCount = UInt16(fromData: data[currentIndex..<startIndexOfTimestamp]) else {
-            print("File \(file): Invalid byte count")
-            throw MetricError.logFileCorrupted
-        }
-        let nextIndex = startIndexOfTimestamp + Int(byteCount)
-        guard nextIndex <= data.endIndex else {
-            print("File \(file): Needed \(byteCountLength + Int(byteCount)) for timestamped value, has \(data.endIndex - startIndexOfTimestamp)")
-            throw MetricError.logFileCorrupted
-        }
-        guard byteCount >= timestampLength else {
-            print("File \(file): Only \(byteCount) bytes, needed \(timestampLength) for timestamp")
-            throw MetricError.logFileCorrupted
-        }
-        let timestampData = data[startIndexOfTimestamp..<startIndexOfTimestamp+timestampLength]
-        let timestamp = try decoder.decode(Double.self, from: timestampData)
-        let date = Date(timeIntervalSince1970: timestamp)
-        let elementData = data[startIndexOfTimestamp+timestampLength..<nextIndex]
-        do {
-            let element: T = try decoder.decode(from: elementData)
-            result.append(.init(value: element, timestamp: date))
-        } catch {
-            skippedValues += 1
-        }
-        currentIndex = nextIndex
-        if result.count % 100 == 1 {
-            print("File \(file): \(result.count) entries loaded (\(currentIndex)/\(data.endIndex) bytes)")
-        }
-    }
-    print("Loaded \(result.count) data points (\(skippedValues) skipped)")
-    return result
-}
-
-extension UInt16 {
-
-    func toData() -> Data {
-        Data([UInt8(self >> 8 & 0xFF), UInt8(self & 0xFF)])
-    }
-
-    init?<T: DataProtocol>(fromData data: T) {
-        guard data.count == 2 else {
-            return nil
-        }
-        let bytes = Array(data)
-        self = UInt16(UInt32(bytes[0]) << 8 | UInt32(bytes[1]))
-    }
-}
diff --git a/Sources/Run/main.swift b/Sources/Run/main.swift
index 367829a..4e625fb 100644
--- a/Sources/Run/main.swift
+++ b/Sources/Run/main.swift
@@ -6,12 +6,6 @@ try LoggingSystem.bootstrap(from: &env)
 let app = Application(env)
 defer { app.shutdown() }
 
-let storageFolder = URL(fileURLWithPath: app.directory.resourcesDirectory)
-let logFolder = storageFolder.appendingPathComponent("logs")
-print("Starting migration")
-try migrate(folder: logFolder)
-print("Finished migration")
-/*
 private let semaphore = DispatchSemaphore(value: 0)
 Task {
     try await configure(app)
@@ -19,4 +13,3 @@ Task {
 }
 semaphore.wait()
 try app.run()
-*/