restructured viewmodels, better serialization

viewmodels/year.go

@@ -0,0 +1,87 @@
+package viewmodels
+
+import (
+	"errors"
+	"slices"
+	"sort"
+	"strconv"
+
+	"github.com/Theodor-Springmann-Stiftung/kgpz_web/helpers/logging"
+	"github.com/Theodor-Springmann-Stiftung/kgpz_web/providers/xmlprovider"
+)
+
+type IssuesByMonth map[int][]IssueViewModel
+
+type YearViewModel struct {
+	Year           string
+	AvailableYears []string
+	Issues         IssuesByMonth
+}
+
+func (y *YearViewModel) PushIssue(i xmlprovider.Issue) {
+	iv, err := FromIssue(i)
+	if err != nil {
+		return
+	}
+
+	month, _ := strconv.Atoi(iv.Month[2])
+
+	list, ok := y.Issues[month]
+	if !ok {
+		list = []IssueViewModel{}
+	}
+
+	y.Issues[month] = append(list, *iv)
+}
+
+func (y *YearViewModel) PushAvailable(s string) {
+
+	if !slices.Contains(y.AvailableYears, s) {
+		y.AvailableYears = append(y.AvailableYears, s)
+	}
+}
+
+func (y *YearViewModel) SortAvailableYears() {
+	sort.Slice(y.AvailableYears, func(i, j int) bool {
+		iint, err := strconv.Atoi(y.AvailableYears[i])
+		if err != nil {
+			return true
+		}
+		jint, err := strconv.Atoi(y.AvailableYears[j])
+		if err != nil {
+			return false
+		}
+		return iint < jint
+	})
+}
+
+func YearView(year string, lib *xmlprovider.Library) (*YearViewModel, error) {
+	res := YearViewModel{Year: year}
+	res.Issues = make(IssuesByMonth, 12)
+	last := ""
+	for _, issue := range lib.Issues.Items.Issues {
+
+		logging.ObjDebug(&issue, "Issue")
+		if len(issue.Datum.When) < 4 {
+			continue
+		}
+
+		date := issue.Datum.When[0:4]
+		if date != last {
+			res.PushAvailable(date)
+			last = date
+		}
+
+		if date == year {
+			res.PushIssue(issue)
+		}
+	}
+
+	if len(res.Issues) == 0 {
+		return nil, errors.New("No issues found")
+	}
+
+	res.SortAvailableYears()
+
+	return &res, nil
+}