Fix decoding Hashtag.History on Mastodon

Pachyderm/Model/Hashtag.swift

@@ -32,6 +32,39 @@ extension Hashtag {
         public let uses: Int
         public let accounts: Int
         
+        public required init(from decoder: Decoder) throws {
+            let container = try decoder.container(keyedBy: CodingKeys.self)
+            
+            if let day = try? container.decode(Date.self, forKey: .day) {
+                self.day = day
+            } else if let unixTimestamp = try? container.decode(Double.self, forKey: .day) {
+                self.day = Date(timeIntervalSince1970: unixTimestamp)
+            } else if let str = try? container.decode(String.self, forKey: .day),
+                let unixTimestamp = Double(str) {
+                self.day = Date(timeIntervalSince1970: unixTimestamp)
+            } else {
+                throw DecodingError.dataCorruptedError(forKey: .day, in: container, debugDescription: "day must be either date or UNIX timestamp")
+            }
+            
+            if let uses = try? container.decode(Int.self, forKey: .uses) {
+                self.uses = uses
+            } else if let str = try? container.decode(String.self, forKey: .uses),
+                let uses = Int(str) {
+                self.uses = uses
+            } else {
+                throw DecodingError.dataCorruptedError(forKey: .uses, in: container, debugDescription: "uses must either be int or string containing int")
+            }
+            
+            if let accounts = try? container.decode(Int.self, forKey: .accounts) {
+                self.accounts = accounts
+            } else if let str = try? container.decode(String.self, forKey: .accounts),
+                let accounts = Int(str) {
+                self.accounts = accounts
+            } else {
+                throw DecodingError.dataCorruptedError(forKey: .accounts, in: container, debugDescription: "accounts must either be int or string containing int")
+            }
+        }
+
         private enum CodingKeys: String, CodingKey {
             case day
             case uses