feat 添加计算过程实现

structs/utils/calculate-process.go

@@ -0,0 +1,39 @@
+package utils
+
+import (
+	"strings"
+
+	v2 "gitea.timerzz.com/kedaya_haitao/common/structs/v2"
+)
+
+func CalculateProviderPrice(calculates []v2.CalculateProcess, env map[string]int) (p v2.ProviderPrice) {
+	var calculateStrings = make([]string, 0, len(calculates))
+	for _, c := range calculates {
+		process, price := c.Run(env)
+		if process != "" {
+			calculateStrings = append(calculateStrings, process)
+			if p.FinalPrice == 0 {
+				p.FinalPrice = price
+			}
+			p.FinalPrice = min(p.FinalPrice, price)
+		}
+	}
+	p.CalMark = strings.Join(calculateStrings, "\n")
+	return
+}
+
+func CalculateSellerPrice(calculates []v2.CalculateProcess, env map[string]int) (p v2.SellerPrice) {
+	var calculateStrings = make([]string, 0, len(calculates))
+	for _, c := range calculates {
+		process, price := c.Run(env)
+		if process != "" {
+			calculateStrings = append(calculateStrings, process)
+			if p.FinalPrice == 0 {
+				p.FinalPrice = price
+			}
+			p.FinalPrice = min(p.FinalPrice, price)
+		}
+	}
+	p.CalMark = strings.Join(calculateStrings, "\n")
+	return
+}

structs/v2/calculate-process.go

@@ -1,7 +1,11 @@
 package v2
 
 import (
+	"fmt"
+	"strings"
 	"time"
+
+	"github.com/expr-lang/expr"
 )
 
 type CalculateProcess struct {
@@ -19,3 +23,34 @@ type CalculateProcess struct {
 	// 名称
 	Name string `json:"name"`
 }
+
+// 计算过程
+func (c *CalculateProcess) Run(env map[string]int) (string, int) {
+	if c.Condition != "" {
+		condition, err := expr.Compile(c.Condition, expr.AsBool())
+		if err != nil {
+			return fmt.Sprintf("【%s】 condition compile error: %v", c.Name, err), 0
+		}
+		if ok, err := expr.Run(condition, env); err != nil {
+			return fmt.Sprintf("【%s】 condition run error: %v", c.Name, err), 0
+		} else if !ok.(bool) {
+			return "", 0
+		}
+	}
+	program, err := expr.Compile(c.Process, expr.AsInt())
+	if err != nil {
+		return fmt.Sprintf("【%s】 process compile error: %v", c.Name, err), 0
+	}
+
+	output, err := expr.Run(program, env)
+	if err != nil {
+		return fmt.Sprintf("【%s】 process run error: %v", c.Name, err), 0
+	}
+	var replaceList = make([]string, 0, 2*len(env))
+	for k, v := range env {
+		replaceList = append(replaceList, k, fmt.Sprintf("%.2f", float64(v/100)))
+	}
+	replacer := strings.NewReplacer(replaceList...)
+	var resp = output.(int)
+	return replacer.Replace(fmt.Sprintf("【%s】 %s = %.2f", c.Name, c.Process, float64(resp/100))), resp
+}