48 lines
1.3 KiB
Go
48 lines
1.3 KiB
Go
package flow_definition
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import (
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"encoding/json"
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"fmt"
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"github.com/Knetic/govaluate"
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)
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type ApprovalCondition interface {
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EvaluateCondition(data map[string]interface{}) (bool, error) // 评估条件表达式
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}
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type ApprovalConditionCommon struct {
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ApprovalCondition
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ConditionExpression string `gorm:"type:text" json:"condition_expression"` // 条件表达式
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}
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func (a *ApprovalConditionCommon) MarshalBinary() ([]byte, error) {
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return json.Marshal(a)
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}
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func (a *ApprovalConditionCommon) UnmarshalBinary(data []byte) error {
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return json.Unmarshal(data, a)
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}
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// EvaluateCondition 评估条件表达式
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func (a *ApprovalConditionCommon) EvaluateCondition(data map[string]interface{}) (bool, error) {
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if a.ConditionExpression == "" {
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return true, nil // 空条件，默认满足
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}
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// 创建可评估的表达式
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expression, err := govaluate.NewEvaluableExpression(a.ConditionExpression)
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if err != nil {
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return false, fmt.Errorf("failed to parse condition expression: %v", err)
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}
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// 评估表达式
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result, err := expression.Evaluate(data)
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if err != nil {
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return false, fmt.Errorf("failed to evaluate condition: %v", err)
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}
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// 将结果转换为布尔值
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boolResult, ok := result.(bool)
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if !ok {
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return false, fmt.Errorf("condition expression does not return a boolean value")
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}
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return boolResult, nil
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}
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