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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,203 +1,59 @@ | ||
| package parser | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "strconv" | ||
| "regexp" | ||
| "strings" | ||
|
|
||
| "github.com/expr-lang/expr" | ||
| "github.com/toolkits/pkg/logger" | ||
| ) | ||
|
|
||
| func MathCalc(s string, data map[string]float64) (float64, error) { | ||
| var err error | ||
| p := NewParser([]rune(s)) | ||
| err = p.Parse() | ||
| if err != nil { | ||
| return 0, err | ||
| } | ||
|
|
||
| for _, stat := range p.Stats() { | ||
| v, err := eval(stat, data) | ||
| if err != nil { | ||
| return 0, err | ||
| } | ||
| logger.Infof("exp:%s res:%v", s, v) | ||
| return v, nil | ||
| } | ||
|
|
||
| return 0, err | ||
| } | ||
|
|
||
| func Calc(s string, data map[string]float64) bool { | ||
| var err error | ||
| p := NewParser([]rune(s)) | ||
| err = p.Parse() | ||
| if err != nil { | ||
| logger.Errorf("parse err:%v", err) | ||
| return false | ||
| } | ||
|
|
||
| for _, stat := range p.Stats() { | ||
| v, err := eval(stat, data) | ||
| if err != nil { | ||
| logger.Error("eval error:", err) | ||
| return false | ||
| } | ||
| logger.Infof("exp:%s res:%v", s, v) | ||
| if v > 0.0 { | ||
| return true | ||
| } | ||
| } | ||
|
|
||
| return false | ||
| } | ||
|
|
||
| func eval(stat Node, data map[string]float64) (float64, error) { | ||
| switch node := stat.(type) { | ||
| case *BinaryNode: | ||
| return evalBinary(node, data) | ||
| case *IdentifierNode: | ||
| return get(node.Lit, data) | ||
| case *NumberNode: | ||
| return evaluateNumber(node) | ||
| default: | ||
| return 0, fmt.Errorf("invalid node: %v", node) | ||
| m := make(map[string]float64) | ||
| for k, v := range data { | ||
| m[cleanStr(k)] = v | ||
| } | ||
| } | ||
|
|
||
| func evaluateNumber(node *NumberNode) (float64, error) { | ||
| switch node.Type { | ||
| case IntLiteral: | ||
| v, err := strconv.ParseFloat(node.Lit, 64) | ||
| if err != nil { | ||
| return 0, err | ||
| } | ||
| return v, nil | ||
| } | ||
| return 0, fmt.Errorf("invalid type: %v", node.Type) | ||
| } | ||
|
|
||
| func get(name string, data map[string]float64) (float64, error) { | ||
| value, exists := data[name] | ||
| if !exists { | ||
| return 0, fmt.Errorf("%s not found", name) | ||
| } | ||
|
|
||
| return value, nil | ||
| } | ||
|
|
||
| func evalBinary(node *BinaryNode, data map[string]float64) (float64, error) { | ||
| left, err := eval(node.Left, data) | ||
| program, err := expr.Compile(cleanStr(s), expr.Env(m)) | ||
| if err != nil { | ||
| return 0, err | ||
| } | ||
| right, err := eval(node.Right, data) | ||
|
|
||
| output, err := expr.Run(program, m) | ||
| if err != nil { | ||
| return 0, err | ||
| } | ||
|
|
||
| switch node.Type { | ||
| case AND: | ||
| return and(left, right), nil | ||
| case OR: | ||
| return or(left, right), nil | ||
| case Plus: | ||
| return add(left, right), nil | ||
| case Minus: | ||
| return minus(left, right), nil | ||
| case Star: | ||
| return star(left, right), nil | ||
| case Slash: | ||
| return slash(left, right) | ||
| case GT: | ||
| return gt(left, right), nil | ||
| case GE: | ||
| return ge(left, right), nil | ||
| case LT: | ||
| return lt(left, right), nil | ||
| case LE: | ||
| return le(left, right), nil | ||
| case EQ: | ||
| return eq(left, right), nil | ||
| case NE: | ||
| return ne(left, right), nil | ||
| } | ||
| return 0, fmt.Errorf("invalid operator: %v", node.Type) | ||
| } | ||
|
|
||
| // and | ||
| func and(left, right float64) float64 { | ||
| if left > 0.0 && right > 0.0 { | ||
| return 1 | ||
| } | ||
| return 0 | ||
| } | ||
|
|
||
| // or | ||
| func or(left, right float64) float64 { | ||
| if left > 0.0 || right > 0.0 { | ||
| return 1 | ||
| } | ||
| return 0 | ||
| } | ||
|
|
||
| func gt(left, right float64) float64 { | ||
| if left > right { | ||
| return 1 | ||
| } | ||
| return 0 | ||
| } | ||
|
|
||
| func ge(left, right float64) float64 { | ||
| if left >= right { | ||
| return 1 | ||
| } | ||
| return 0 | ||
| } | ||
|
|
||
| func lt(left, right float64) float64 { | ||
| if left < right { | ||
| return 1 | ||
| } | ||
| return 0 | ||
| } | ||
|
|
||
| func le(left, right float64) float64 { | ||
| if left <= right { | ||
| return 1 | ||
| } | ||
| return 0 | ||
| } | ||
|
|
||
| func eq(left, right float64) float64 { | ||
| if left == right { | ||
| return 1 | ||
| if result, ok := output.(float64); ok { | ||
| return result, nil | ||
| } else if result, ok := output.(bool); ok { | ||
| if result { | ||
| return 1, nil | ||
| } else { | ||
| return 0, nil | ||
| } | ||
| } else { | ||
| return 0, nil | ||
| } | ||
| return 0 | ||
| } | ||
|
|
||
| func ne(left, right float64) float64 { | ||
| if left != right { | ||
| return 1 | ||
| func Calc(s string, data map[string]float64) bool { | ||
| v, err := MathCalc(s, data) | ||
| if err != nil { | ||
| logger.Errorf("Calc exp:%s data:%v error: %v", s, data, err) | ||
| return false | ||
| } | ||
| return 0 | ||
| } | ||
|
|
||
| func add(left, right float64) float64 { | ||
| return left + right | ||
| return v > 0 | ||
| } | ||
|
|
||
| func minus(left, right float64) float64 { | ||
| return left - right | ||
| func cleanStr(s string) string { | ||
| s = replaceDollarSigns(s) | ||
| s = strings.ReplaceAll(s, "$.", "") | ||
| return s | ||
| } | ||
|
|
||
| func star(left, right float64) float64 { | ||
| return left * right | ||
| } | ||
|
|
||
| func slash(left, right float64) (float64, error) { | ||
| if right == 0 { | ||
| return 0, fmt.Errorf("right is zero") | ||
| } | ||
| res := left / right | ||
| return res, nil | ||
| func replaceDollarSigns(s string) string { | ||
| re := regexp.MustCompile(`\$([A-Z])\.`) | ||
| return re.ReplaceAllString(s, "${1}_") | ||
| } |
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