first calculation logic

theme.go

@@ -0,0 +1,64 @@
+package goodcalc
+
+// Theme is the basic element of the matrix.
+// No defines the id of the excel balance.
+// A1 for Human dignity in the supply chain
+type Theme struct {
+	No              string           `json:"no"`
+	Weight          float32          `json:"weight"`
+	Aspects         []Aspect         `json:"aspects"`
+	NegativeAspects []NegativeAspect `json:"negative_aspects"`
+	NegPointsFactor int              `json:"neg_points_factor"`
+	Calc            *ThemeCalc       `json:"calculation"`
+}
+
+func (t *Theme) calcNrPosAspects() {
+	t.Calc.NrPositiveAspects = len(t.Aspects)
+}
+
+func (t *Theme) calcValPoints() {
+	t.Calc.ValuationPoints = 0
+	for _, a := range t.Aspects {
+		t.Calc.ValuationPoints += a.ValuationPoints * int(a.Weight)
+	}
+	for _, na := range t.NegativeAspects {
+		t.Calc.NegativeValuationPoints +=
+			na.ValuationPoints * int(na.Weight)
+	}
+}
+
+func (t *Theme) calcEstPercentage() {
+	t.Calc.EstPercentage = 0
+	if t.Calc.MaxValuationPoints != 0 {
+		t.Calc.EstPercentage =
+			float32(t.Calc.ValuationPoints / t.Calc.MaxValuationPoints)
+	}
+}
+
+func (t *Theme) calcBalancePoints() {
+	t.Calc.BalancePoints =
+		t.Calc.EstPercentage * t.Calc.MaxBalancePoints
+	t.Calc.NegativeBlancePoints =
+		float32(t.Calc.NegativeValuationPoints) * t.Calc.MaxBalancePoints / float32(t.NegPointsFactor)
+}
+
+// ThemeCalc contains the different calculation
+// steps.
+type ThemeCalc struct {
+	CalcWeight              float32 `json:"calc_weight"`
+	WeightFactor            float32 `json:"weight_factor"`
+	MaxBalancePoints        float32 `json:"max_points"`
+	NrPositiveAspects       int     `json:"nr_positive_aspects"`
+	ValuationPoints         int     `json:"valuation_points"`
+	MaxValuationPoints      int     `json:"max_valuation_points"`
+	EstPercentage           float32 `json:"est_percentage"`
+	BalancePoints           float32 `json:"balance_points"`
+	NegativeValuationPoints int     `json:"negative_valuation_points"`
+	NegativeBlancePoints    float32 `json:"negative_blance_points"`
+}
+
+// calcMaxPoints
+// Stakeholder.calcWeight needs to run first
+func (c *ThemeCalc) calcMaxPoints() {
+	c.MaxBalancePoints = c.CalcWeight * c.WeightFactor
+}