Import initail de calcul-astreintes v0.9.4 pour passage en paycheck 1.0

internal/calc/compute.go

@@ -0,0 +1,74 @@
+package calc
+
+import (
+	"math"
+
+	"git.dumerain.org/alban/calcul-astreintes/internal/models"
+)
+
+/*
+Le moteur de calcul est volontairement isolé du reste.
+Ça facilite :
+- les tests unitaires
+- l'évolution des règles
+- le support de nouveaux codes
+*/
+
+func round2(v float64) float64 {
+	return math.Round(v*100) / 100
+}
+
+func Compute(req models.CalculateRequest, profile models.Profile, rules models.GlobalRules) models.CalculateResponse {
+	// Chaque ligne = taux * quantité, arrondi au centime.
+	// Libellés volontairement "fiche de paie" (courts) pour que UI + PDF collent.
+	lines := []models.Line{
+		{
+			Code:     "456",
+			Label:    "Interv.astreinte Jour",
+			Rate:     profile.T456,
+			Quantity: req.Q456,
+			Unit:     "h",
+			Amount:   round2(profile.T456 * req.Q456),
+		},
+		{
+			Code:     "458",
+			Label:    "Interv.astreinte Dim & JF",
+			Rate:     profile.T458,
+			Quantity: req.Q458,
+			Unit:     "h",
+			Amount:   round2(profile.T458 * req.Q458),
+		},
+		{
+			Code:     "459",
+			Label:    "Interv.astreinte Nuit",
+			Rate:     profile.T459,
+			Quantity: req.Q459,
+			Unit:     "h",
+			Amount:   round2(profile.T459 * req.Q459),
+		},
+		{
+			Code:     "471",
+			Label:    "Astreinte",
+			Rate:     profile.T471,
+			Quantity: req.Q471,
+			Unit:     "h",
+			Amount:   round2(profile.T471 * req.Q471),
+		},
+		{
+			Code:     "480",
+			Label:    "Ind. Forfait. Dim & JF",
+			Rate:     rules.ForfaitDimFerie,
+			Quantity: float64(req.NbDimFerie),
+			Unit:     "j",
+			Amount:   round2(rules.ForfaitDimFerie * float64(req.NbDimFerie)),
+		},
+	}
+
+	// Total = somme des montants déjà arrondis (comportement typique paie).
+	total := 0.0
+	for _, l := range lines {
+		total += l.Amount
+	}
+
+	return models.CalculateResponse{Lines: lines, Total: round2(total)}
+}