Fixed some type issues + made request methods

.gitignore

@@ -6,3 +6,4 @@ DerivedData/
 .swiftpm/configuration/registries.json
 .swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
 .netrc
+.env

Package.swift

@@ -5,6 +5,9 @@ import PackageDescription
 
 let package = Package(
     name: "USDA_FDC",
+    platforms: [
+        .macOS(.v14),
+    ],
     products: [
         // Products define the executables and libraries a package produces, making them visible to other packages.
         .library(

Sources/USDA_FDC/USDA_FDC.swift

@@ -1,6 +1,129 @@
 // The Swift Programming Language
 // https://docs.swift.org/swift-book
 
-final class USDA_FDC_Client {
+import Foundation
 
+public final class USDA_FDC_Client {
+    var version = 1
+    var baseURL: URL {
+        URL(string: "https://api.nal.usda.gov/fdc/v\(version)")!
+    }
+
+    public init() {}
+
+    public var apiKey: String = ""
+
+    public func getFood(_ foodCriteria: FoodCriteria) async throws -> AbridgedFoodItem {
+        var endpoint = baseURL.appendingPathComponent("/food/\(foodCriteria.fdcId)")
+        endpoint.append(queryItems: [.init(name: "api_key", value: apiKey)])
+        // if criteria != nil {
+        //     for (key, value) in Mirror(reflecting: criteria!).children {
+        //         if value as Any? != nil {
+        //             if let l = value as? [String] {
+        //                 endpoint.append(queryItems: [.init(name: key!, value: String(describing: l.joined(separator: ",")))])
+        //             }
+        //             endpoint.append(queryItems: [.init(name: key!, value: String(describing: value))])
+        //         }
+        //     }
+        // }
+        print(endpoint)
+        var request = URLRequest(url: endpoint)
+        request.setValue("application/json", forHTTPHeaderField: "accept")
+        let (data, response) = try await URLSession.shared.data(for: request)
+        guard let response = response as? HTTPURLResponse, response.statusCode == 200 else {
+            throw FDCError.invalidResponse
+        }
+        do {
+            return try JSONDecoder().decode(AbridgedFoodItem.self, from: data)
+        } catch {
+            throw error
+        }
+    }
+
+    // TODO: 
+    public func getFoods(_ foodsCriteria: FoodsCriteria) async throws -> [AbridgedFoodItem] {
+        var endpoint = baseURL.appendingPathComponent("/food")
+        endpoint.append(queryItems: [.init(name: "api_key", value: apiKey)])
+        // if criteria != nil {
+        //     for (key, value) in Mirror(reflecting: criteria!).children {
+        //         if value as Any? != nil {
+        //             if let l = value as? [String] {
+        //                 endpoint.append(queryItems: [.init(name: key!, value: String(describing: l.joined(separator: ",")))])
+        //             }
+        //             endpoint.append(queryItems: [.init(name: key!, value: String(describing: value))])
+        //         }
+        //     }
+        // }
+        print(endpoint)
+        var request = URLRequest(url: endpoint)
+        request.setValue("application/json", forHTTPHeaderField: "accept")
+        let (data, response) = try await URLSession.shared.data(for: request)
+        guard let response = response as? HTTPURLResponse, response.statusCode == 200 else {
+            throw FDCError.invalidResponse
+        }
+        do {
+            return try JSONDecoder().decode([AbridgedFoodItem].self, from: data)
+        } catch {
+            throw error
+        }
+    }
+
+    public func getFoodsSearch(_ search: FoodSearchCriteria) async throws -> SearchResult {
+        var endpoint = baseURL.appendingPathComponent("/foods/search")
+        endpoint.append(queryItems: [.init(name: "api_key", value: apiKey)])
+        endpoint.append(queryItems: [.init(name: "query", value: search.query)])
+        // if criteria != nil {
+        //     for (key, value) in Mirror(reflecting: criteria!).children {
+        //         if value as Any? != nil {
+        //             if let l = value as? [String] {
+        //                 endpoint.append(queryItems: [.init(name: key!, value: String(describing: l.joined(separator: ",")))])
+        //             }
+        //             endpoint.append(queryItems: [.init(name: key!, value: String(describing: value))])
+        //         }
+        //     }
+        // }
+        print(endpoint)
+        var request = URLRequest(url: endpoint)
+        request.setValue("application/json", forHTTPHeaderField: "accept")
+        let (data, response) = try await URLSession.shared.data(for: request)
+        guard let response = response as? HTTPURLResponse, response.statusCode == 200 else {
+            throw FDCError.invalidResponse
+        }
+        do {
+            return try JSONDecoder().decode(SearchResult.self, from: data)
+        } catch {
+            throw error
+        }
+    }
+
+    public func getFoodList(_: FoodListCriteria? = nil) async throws -> [AbridgedFoodItem] {
+        var endpoint = baseURL.appendingPathComponent("/foods/list")
+        endpoint.append(queryItems: [.init(name: "api_key", value: apiKey)])
+        // if criteria != nil {
+        //     for (key, value) in Mirror(reflecting: criteria!).children {
+        //         if value as Any? != nil {
+        //             if let l = value as? [String] {
+        //                 endpoint.append(queryItems: [.init(name: key!, value: String(describing: l.joined(separator: ",")))])
+        //             }
+        //             endpoint.append(queryItems: [.init(name: key!, value: String(describing: value))])
+        //         }
+        //     }
+        // }
+        print(endpoint)
+        var request = URLRequest(url: endpoint)
+        request.setValue("application/json", forHTTPHeaderField: "accept")
+        let (data, response) = try await URLSession.shared.data(for: request)
+        guard let response = response as? HTTPURLResponse, response.statusCode == 200 else {
+            throw FDCError.invalidResponse
+        }
+        do {
+            return try JSONDecoder().decode([AbridgedFoodItem].self, from: data)
+        } catch {
+            throw error
+        }
+    }
+}
+
+public enum FDCError: Error {
+    case invalidResponse
 }

Sources/USDA_FDC/types/AbridgedFoodItem.swift

@@ -1,12 +1,40 @@
-public struct AbridgedFoodItem: Codable {
+import Foundation
-    public let dataType: String
+
-    public let description: String
+public class AbridgedFoodItem: Codable {
-    public let fdcId: Int
+    public var dataType: String = ""
-    public let foodNutrients: [AbridgedFoodNutrient]
+    public var description: String = ""
-    public let publicationDate: String?
+    public var fdcId: Int = 0
-    public let brandOwner: String?
+    public var foodNutrients: [AbridgedFoodNutrient] = []
-    public let gtinUpc: String?
+    public var publicationDate: String?
-    public let ndbNumber: Int?
+    public var brandOwner: String?
-    public let foodCode: String?
+    public var gtinUpc: String?
+    public var ndbNumber: Int?
+    public var foodCode: String?
+
+    private enum CodingKeys: String, CodingKey {
+        case dataType, description, fdcId, foodNutrients, publicationDate, brandOwner, gtinUpc, ndbNumber, foodCode
     }
 
+    public required init(from decoder: Decoder) throws {
+        let container = try decoder.container(keyedBy: CodingKeys.self)
+
+        dataType = try container.decode(String.self, forKey: .dataType)
+        description = try container.decode(String.self, forKey: .description)
+        fdcId = try container.decode(Int.self, forKey: .fdcId)
+        foodNutrients = try container.decode([AbridgedFoodNutrient].self, forKey: .foodNutrients)
+        publicationDate = try container.decodeIfPresent(String.self, forKey: .publicationDate)
+        brandOwner = try container.decodeIfPresent(String.self, forKey: .brandOwner)
+        gtinUpc = try container.decodeIfPresent(String.self, forKey: .gtinUpc)
+        foodCode = try container.decodeIfPresent(String.self, forKey: .foodCode)
+        // Only manually handle the special case for ndbNumber
+        if let stringValue = try? container.decode(String.self, forKey: .ndbNumber),
+           let intValue = Int(stringValue) {
+            // If the value is a string, attempt to convert it to Int
+            ndbNumber = intValue
+        } else {
+            // Let other properties initialize themselves
+            ndbNumber = nil  // Or any other default value or leave it as nil
+        }
+    }
+
+}

Sources/USDA_FDC/types/AbridgedFoodNutrient.swift

@@ -1,9 +1,9 @@
 public struct AbridgedFoodNutrient: Codable {
-    public let number: Int
+    public let number: String?
-    public let name: String
+    public let name: String?
-    public let amount: Float
+    public let amount: Float?
-    public let unitName: String
+    public let unitName: String?
-    public let derivationCode: String
+    public let derivationCode: String?
-    public let derivationDescription: String
+    public let derivationDescription: String?
 }
 

Sources/USDA_FDC/types/FoodCriteria.swift

@@ -0,0 +1,9 @@
+public struct FoodCriteria: Codable {
+    public var fdcId: Int // Max : 20 items
+    public var format: [Format]?
+    public var nutrients: [Int]? // Max : 25 items
+
+    public enum Format: String, Codable {
+        case abridged, full
+    }
+}

Sources/USDA_FDC/types/FoodListCriteria.swift

@@ -1,7 +1,7 @@
 public struct FoodListCriteria: Codable {
-    public let dataType: [DataType]?
+    public var dataType: [DataType]?
-    public let pageSize: Int? // 1..=200, default 50
+    public var pageSize: Int? // 1..=200, default 50
-    public let pageNumber: Int?
+    public var pageNumber: Int?
-    public let sortBy: SortBy?
+    public var sortBy: SortBy?
-    public let sortOrder: SortOrder?
+    public var sortOrder: SortOrder?
 }

Sources/USDA_FDC/types/FoodSearchCriteria.swift

@@ -1,12 +1,12 @@
 public struct FoodSearchCriteria: Codable {
-    public let query: String
+    public var query: String
-    public let dataType: DataType?
+    public var dataType: DataType?
-    public let pageSize: Int?
+    public var pageSize: Int?
-    public let pageNumber: Int?
+    public var pageNumber: Int?
-    public let sortBy: SortBy?
+    public var sortBy: SortBy?
-    public let sortOrder: SortOrder?
+    public var sortOrder: SortOrder?
-    public let brandOwner: String?
+    public var brandOwner: String?
-    public let tradeChannel: [TradeChannel]? // Max items: 3
+    public var tradeChannel: [TradeChannel]? // Max items: 3
-    public let startDate: String? // Format: YYYY-MM-DD
+    public var startDate: String? // Format: YYYY-MM-DD
-    public let endDate: String? // Format: YYYY-MM-DD
+    public var endDate: String? // Format: YYYY-MM-DD
 }

Sources/USDA_FDC/types/SearchResultFood.swift

@@ -1,17 +1,70 @@
 public struct SearchResultFood: Codable {
-    public let fdcId: Int
+    public var fdcId: Int = 0
-    public let dataType: String?
+    public var dataType: String?
-    public let description: String
+    public var description: String = ""
-    public let foodCode: String?
+    public var foodCode: String?
-    public let foodNutrients: [AbridgedFoodNutrient]
+    public var foodNutrients: [AbridgedFoodNutrient] = []
-    public let publicationDate: String?
+    public var publicationDate: String?
-    public let scientificName: String?
+    public var scientificName: String?
-    public let brandOwner: String?
+    public var brandOwner: String?
-    public let gtinUpc: String?
+    public var gtinUpc: String?
-    public let ingredients: String?
+    public var ingredients: String?
-    public let ndbNumber: Int?
+    public var ndbNumber: Int?
-    public let additionalDescriptions: String?
+    public var additionalDescriptions: String?
-    public let allHighlightFields: String?
+    public var allHighlightFields: String?
-    public let score: Float?
+    public var score: Float?
+
+    private enum CodingKeys: String, CodingKey {
+        case fdcId
+        case dataType
+        case description
+        case foodCode
+        case foodNutrients
+        case publicationDate
+        case scientificName
+        case brandOwner
+        case gtinUpc
+        case ingredients
+        case ndbNumber
+        case additionalDescriptions
+        case allHighlightFields
+        case score
+    }
+
+    public init(from decoder: Decoder) throws {
+        let container = try decoder.container(keyedBy: CodingKeys.self)
+        fdcId = try container.decode(Int.self, forKey: .fdcId)
+        dataType = try container.decodeIfPresent(String.self, forKey: .dataType)
+        description = try container.decode(String.self, forKey: .description)
+        foodNutrients = try container.decodeIfPresent([AbridgedFoodNutrient].self, forKey: .foodNutrients) ?? []
+        publicationDate = try container.decodeIfPresent(String.self, forKey: .publicationDate)
+        scientificName = try container.decodeIfPresent(String.self, forKey: .scientificName)
+        brandOwner = try container.decodeIfPresent(String.self, forKey: .brandOwner)
+        gtinUpc = try container.decodeIfPresent(String.self, forKey: .gtinUpc)
+        ingredients = try container.decodeIfPresent(String.self, forKey: .ingredients)
+        additionalDescriptions = try container.decodeIfPresent(String.self, forKey: .additionalDescriptions)
+        allHighlightFields = try container.decodeIfPresent(String.self, forKey: .allHighlightFields)
+        score = try container.decodeIfPresent(Float.self, forKey: .score)
+        if let intValue = try? container.decode(Int.self, forKey: .ndbNumber) {
+            // If the value can be directly decoded as Int, use it
+            ndbNumber = intValue
+        } else if let stringValue = try? container.decode(String.self, forKey: .ndbNumber),
+                  let intValue = Int(stringValue) {
+            // If the value is a string, attempt to convert it to Int
+            ndbNumber = intValue
+        } else {
+            // Handle other cases or throw an error if needed
+            ndbNumber = nil
+        }
+
+        if let stringValue = try? container.decode(String.self, forKey: .foodCode) {
+            foodCode = stringValue
+        } else if let intValue = try? container.decode(Int.self, forKey: .foodCode), 
+            let stringValue = Optional(String(intValue)) {
+            foodCode = stringValue
+        } else {
+            foodCode = nil
+        }
+    }
 }
 

Tests/USDATests/USDATests.swift

@@ -1,12 +1,62 @@
 import XCTest
-@testable import USDA
+@testable import USDA_FDC
+
+func loadEnvironment() -> [String: String] {
+    var dic: [String: String] = [:]
+    if FileManager.default.fileExists(atPath: ".env") {
+        do {
+            let contents = try String(contentsOfFile: ".env", encoding: .utf8)
+            let lines = contents.components(separatedBy: .newlines)
+
+            for line in lines {
+                let components = line.components(separatedBy: "=")
+                if components.count == 2 {
+                    let key = components[0].trimmingCharacters(in: .whitespacesAndNewlines)
+                    let value = components[1].trimmingCharacters(in: .whitespacesAndNewlines)
+                    dic[key] = value
+                }
+            }
+        } catch {
+            print("Error reading .env file: \(error)")
+        }
+    }
+    return dic
+}
 
 final class USDATests: XCTestCase {
-    func testExample() throws {
-        // XCTest Documentation
-        // https://developer.apple.com/documentation/xctest
 
-        // Defining Test Cases and Test Methods
+    var env: [String: String] {
-        // https://developer.apple.com/documentation/xctest/defining_test_cases_and_test_methods
+       loadEnvironment() 
+    }
+
+    func testFoodList() async throws {
+        let fdc = USDA_FDC_Client()
+        fdc.apiKey = env["API_KEY"] ?? ""
+        do {
+            let _ = try await fdc.getFoodList()
+        } catch {
+            throw error
+        }
+    }
+
+    func testFoodItem() async throws {
+        let fdc = USDA_FDC_Client()    
+        fdc.apiKey = env["API_KEY"] ?? ""
+        do {
+            let _ = try await fdc.getFood(.init(fdcId: 167782))
+        } catch {
+            throw error
+        }
+    }
+
+    func testFoodSearch() async throws {
+        let fdc = USDA_FDC_Client()    
+        fdc.apiKey = env["API_KEY"] ?? ""
+        do {
+            let _ = try await fdc.getFoodsSearch(.init(query: "cheddar cheese"))
+        } catch {
+            throw error
+        }
+
     }
 }