[#67] BusinessDocument: Add OrganicOperatorId to footer

Elwig/Documents/BusinessDocument.cs

@@ -137,11 +137,15 @@ namespace Elwig.Documents {
             return new KernedParagraph(10)
                 .AddAll(Utils.GenerateFooter("\n", " \u00b7 ")
                     .Item(c.NameFull).NextLine()
-                    .Item(c.Address).Item($"{c.Plz} {c.Ort}").Item("Österreich").Item("Tel.", c.PhoneNr).Item("Fax", c.FaxNr).NextLine()
-                    .Item(c.EmailAddress != null ? link1 : null)
-                        .Item(c.Website != null ? link2 : null)
-                        .Item("Betriebs-Nr.", c.LfbisNr).Item("Bio-KSt.", c.OrganicAuthorityCode).NextLine()
+                    .Item(c.Address).Item($"{c.Plz} {c.Ort}").Item("Österreich").NextGroup()
+                    .Item("Tel.", c.PhoneNr).Item("Fax", c.FaxNr).NextGroup()
+                    .Item(c.EmailAddress != null ? link1 : null).NextLine()
+                    .Item(c.Website != null ? link2 : null).NextGroup()
+                    .Item("Betriebs-Nr.", c.LfbisNr).NextGroup()
+                    .Item("Bio-KSt.", c.OrganicAuthorityCode).NextGroup()
+                    .Item("OOC-ID", c.OrganicOperatorId).NextLine()
                     .Item("UID", c.UstIdNr).Item("BIC", c.Bic).Item("IBAN", c.Iban)
+                    .RebalanceLines()
                     .ToLeafElements());
         }
 

Elwig/Helpers/Utils.cs

@@ -323,7 +323,7 @@ namespace Elwig.Helpers {
         }
 
         public class Footer {
-            private readonly List<List<object>> Items = [[]];
+            private readonly List<List<List<object>>> Items = [[[]]];
             private readonly string LineBreak;
             private readonly string Separator;
 
@@ -334,7 +334,7 @@ namespace Elwig.Helpers {
 
             public Footer Item(object? text) {
                 if (text == null) return this;
-                Items[^1].Add(text);
+                Items[^1][^1].Add(text);
                 return this;
             }
 
@@ -342,13 +342,38 @@ namespace Elwig.Helpers {
                 return text == null ? this : Item($"{name}: {text}");
             }
 
+            public Footer NextGroup() {
+                Items[^1].Add([]);
+                return this;
+            }
+
             public Footer NextLine() {
-                Items.Add([]);
+                Items.Add([[]]);
+                return this;
+            }
+
+            public Footer RebalanceLines() {
+                for (int i = 0; i < Items.Count - 1; i++) {
+                    var groups = Items[i];
+                    var nextGroups = Items[i + 1];
+                    if (groups.Count <= 1) continue;
+                    var g = groups[^1];
+                    var gl = g.Sum(i => (i is Text txt ? txt.GetText().Length : i.ToString()?.Length ?? 0) + Separator.Length);
+                    var l1a = groups.SelectMany(g => g).Sum(i => (i is Text txt ? txt.GetText().Length : i.ToString()?.Length ?? 0) + Separator.Length) - Separator.Length;
+                    var l2a = nextGroups.SelectMany(g => g).Sum(i => (i is Text txt ? txt.GetText().Length : i.ToString()?.Length ?? 0) + Separator.Length) - Separator.Length;
+                    var l1b = l1a - gl;
+                    var l2b = l2a + gl;
+                    if (Math.Abs(l1b - l2b) <= Math.Abs(l1a - l2a)) {
+                        Items[i].Remove(g);
+                        Items[i + 1].Insert(0, g);
+                        i--;
+                    }
+                }
                 return this;
             }
 
             public override string ToString() {
-                return string.Join(LineBreak, Items.Select(l => string.Join(Separator, l.ToString())));
+                return string.Join(LineBreak, Items.Select(l => string.Join(Separator, l.SelectMany(g => g).ToString())));
             }
 
             public IList<ILeafElement> ToLeafElements() {
@@ -357,11 +382,13 @@ namespace Elwig.Helpers {
                 foreach (var line in Items) {
                     if (!first1) l.Add(new Text(LineBreak));
                     var first2 = true;
-                    foreach (var item in line) {
+                    foreach (var group in line) {
+                        foreach (var item in group) {
                             if (!first2) l.Add(new Text(Separator));
                             l.Add(item as ILeafElement ?? new Text(item.ToString() ?? ""));
                             first2 = false;
                         }
+                    }
                     first1 = false;
                 }
                 return l;
@@ -675,7 +702,7 @@ namespace Elwig.Helpers {
                                 p[2],
                                 int.Parse(p[3]),
                                 p[4],
-                                p[5].Split(',').Select(a => a.Replace(" | ", "\n")).ToArray(),
+                                [.. p[5].Split(',').Select(a => a.Replace(" | ", "\n"))],
                                 p[6],
                                 p[7].Split(',')
                             ));