restructured viewmodels, better serialization

viewmodels/singleissue.go

@@ -0,0 +1,51 @@
+package viewmodels
+
+import (
+	"github.com/Theodor-Springmann-Stiftung/kgpz_web/helpers/logging"
+	"github.com/Theodor-Springmann-Stiftung/kgpz_web/providers/xmlprovider"
+)
+
+type SingleIssueViewModel struct {
+	IssueViewModel
+	No          string
+	Year        string
+	Additionals []PieceViewModel
+	Pieces      []PieceViewModel
+	Next        IssueViewModel
+	Prev        IssueViewModel
+}
+
+func NewSingleIssueView(y string, No string, lib *xmlprovider.Library) (*SingleIssueViewModel, error) {
+	ivm, err := IssueView(y, No, lib)
+	if err != nil {
+		return nil, err
+	}
+
+	sivm := SingleIssueViewModel{IssueViewModel: *ivm}
+
+	for _, a := range lib.Pieces.Items.Piece {
+		for _, r := range a.IssueRefs {
+			if r.Datum == y && r.Nr == No {
+				p, err := NewPieceView(a)
+				if err != nil {
+					logging.ObjErr(&a, err)
+					continue
+				}
+				sivm.Pieces = append(sivm.Pieces, p)
+			}
+		}
+
+		for _, r := range a.AdditionalRef {
+			if r.Datum == y && r.Nr == No {
+				p, err := NewPieceView(a)
+				if err != nil {
+					logging.ObjErr(&a, err)
+					continue
+				}
+				sivm.Additionals = append(sivm.Additionals, p)
+			}
+		}
+	}
+
+	return &sivm, nil
+}