Better logging for errors

Sources/App/CapServer.swift

@@ -86,9 +86,14 @@ final class CapServer {
     }
 
     private func loadCaps() throws {
+        do {
             let data = try Data(contentsOf: dbFile)
             caps = try JSONDecoder().decode([Cap].self, from: data)
                 .reduce(into: [:]) { $0[$1.id] = $1 }
+        } catch {
+            log("Failed to load caps: \(error)")
+            throw error
+        }
         log("\(caps.count) caps loaded")
     }
 
@@ -146,11 +151,16 @@ final class CapServer {
     // MARK: Counts
 
     private func updateCounts() throws {
+        do {
             caps = try caps.mapValues {
                 var cap = $0
                 cap.count = try count(of: $0.id)
                 return cap
             }
+        } catch {
+            log("Failed to update counts: \(error)")
+            throw error
+        }
     }
 
     func countImages(in folder: URL) throws -> Int {

Sources/App/configure.swift

@@ -13,13 +13,9 @@ public func configure(_ app: Application) throws {
         .appendingPathComponent("config.json")
     let config: Config
     if !FileManager.default.fileExists(atPath: configFile.path) {
-        config = .default
+        config = try writeDefaultCofig(to: configFile)
-        let configData = try JSONEncoder().encode(config)
-        try configData.write(to: configFile)
-        print("Wrote default configuration")
     } else {
-        let configData = try Data(contentsOf: configFile)
+        config = try loadConfig(at: configFile)
-        config = try JSONDecoder().decode(Config.self, from: configData)
     }
 
     try Log.set(logFile: config.logPath)
@@ -36,3 +32,25 @@ public func configure(_ app: Application) throws {
     // Register routes to the router
     try routes(app)
 }
+
+private func writeDefaultCofig(to path: URL) throws -> Config {
+    do {
+        let configData = try JSONEncoder().encode(Config.default)
+        try configData.write(to: path)
+        print("Wrote default configuration to \(path.path)")
+        return .default
+    } catch {
+        print("Failed to write default config file at \(path.path): \(error)")
+        throw error
+    }
+}
+
+private func loadConfig(at path: URL) throws -> Config {
+    do {
+        let configData = try Data(contentsOf: path)
+        return try JSONDecoder().decode(Config.self, from: configData)
+    } catch {
+        print("Failed to load config file at \(path.path): \(error)")
+        throw error
+    }
+}