From 935cc26190e6c970aaa59d55cb1c8792bcba7752 Mon Sep 17 00:00:00 2001
From: femsci <nya@femboy.science>
Date: Wed, 27 Dec 2023 00:06:26 +0100
Subject: [PATCH] Implement FN, ADR, BDAY, CATEGORIES, NICKNAME

---
 src/Nyanbyte.IDShare.Vcf/Vcard.cs | 78 +++++++++++++++++++++++++++++--
 1 file changed, 73 insertions(+), 5 deletions(-)

diff --git a/src/Nyanbyte.IDShare.Vcf/Vcard.cs b/src/Nyanbyte.IDShare.Vcf/Vcard.cs
index 524949e..9da6aa4 100644
--- a/src/Nyanbyte.IDShare.Vcf/Vcard.cs
+++ b/src/Nyanbyte.IDShare.Vcf/Vcard.cs
@@ -9,7 +9,12 @@ namespace Nyanbyte.IDShare.Vcf;
 public class Vcard
 {
 
+    public string FormattedName { get; set; } = string.Empty;
+    public ICollection<string> Nicknames { get; set; } = new HashSet<string>();
     public DateTime? Birthday { get; set; }
+    public ICollection<string> Categories { get; set; } = new HashSet<string>();
+    public ICollection<VcardAddress> Addresses = new HashSet<VcardAddress>();
+
 
     public static Vcard FromString(string data)
     {
@@ -32,10 +37,13 @@ public class Vcard
             throw new ArgumentException("Invalid data: This implementation supports only VCF version 4.0.");
         }
 
+        Vcard card = new();
+
         foreach (string line in lines[2..^2])
         {
             string keyword = line[..line.IndexOf(':')];
             string? type = null;
+            string value = line[(line.IndexOf(':') + 1)..];
             if (keyword.Contains(';'))
             {
                 type = keyword[(keyword.IndexOf(';') + 1)..];
@@ -45,19 +53,20 @@ public class Vcard
             switch (keyword)
             {
                 case "ADR":
-                    NotImplemented();
+                    VcardAddress addr = VcardAddress.FromLine(line);
+                    card.Addresses.Add(addr);
                     break;
                 case "BDAY":
-                    NotImplemented();
+                    card.Birthday = DateTime.ParseExact(value, "yyyyMMdd", null);
                     break;
                 case "CATEGORIES":
-                    NotImplemented();
+                    card.Categories = value.Split(',');
                     break;
                 case "EMAIL":
                     NotImplemented();
                     break;
                 case "FN":
-                    NotImplemented();
+                    card.FormattedName = value;
                     break;
                 case "GENDER":
                     NotImplemented();
@@ -75,7 +84,7 @@ public class Vcard
                     NotImplemented();
                     break;
                 case "NICKNAME":
-                    NotImplemented();
+                    card.Nicknames = value.Split(',');
                     break;
                 case "NOTE":
                     NotImplemented();
@@ -107,6 +116,10 @@ public class Vcard
             }
         }
 
+        if (string.IsNullOrWhiteSpace(card.FormattedName))
+        {
+            throw new ArgumentException("No FN provided.");
+        }
         throw new NotImplementedException();
     }
 
@@ -120,9 +133,64 @@ public class Vcard
     {
         StringBuilder sb = new("BEGIN:VCARD\nVERSION:4.0;\n");
 
+        sb.AppendLine($"FN:{FormattedName}");
+
+        foreach (var addr in Addresses)
+        {
+            sb.AppendLine(addr.SerializeLine());
+        }
+
+        if (Birthday is not null)
+        {
+            sb.AppendLine($"BDAY:{Birthday.ToString:yyyyMMdd}");
+        }
+
+        if (Categories.Any())
+        {
+            sb.AppendLine($"CATEGORIES:{string.Join(',', Categories)}");
+        }
+
+        if (Nicknames.Any())
+        {
+            sb.AppendLine($"NICKNAME:{string.Join(',', Nicknames)}");
+        }
+
         throw new NotImplementedException();
 
         sb.Append("END:VCARD");
         return sb.ToString();
     }
 }
+
+//TODO Integrate Nyanbyte.Countries
+public record VcardAddress(string AddressType, string? POBox, string? AptNumber, string? Street, string Locality, string? Region, string? POCode, string Country)
+{
+    public static VcardAddress FromLine(string data)
+    {
+        int sep = data.IndexOf(':');
+        if (sep == -1)
+        {
+            throw new ArgumentException("Invalid data: No separating colon.");
+        }
+
+        string prefix = data[..sep];
+
+        //Len of "ADR;TYPE=" is 9
+        string type = prefix[9..];
+
+        string suffix = data[(sep + 1)..];
+
+        string[] values = suffix.Split(';');
+
+        if (values.Length != 7)
+        {
+            throw new ArgumentException($"Invalid data: Invalid number of data fields: Expected 7, got {values.Length}.");
+        }
+
+        return new VcardAddress(type, values[0], values[1], values[2], values[3], values[4], values[5], values[6]);
+    }
+
+    public string SerializeLine() => $"ADR;TYPE={AddressType}:{ToString}";
+
+    public override string ToString() => $"{POBox};{AptNumber};{Street};{Locality};{Region};{POCode};{Country}";
+}