add files

README.md

@@ -1 +1,11 @@
 # sanitize
+
+## Installation
+
+```bash
+go get -u github.com/andoma-go/sanitize
+```
+
+## Documentation
+
+View the generated [documentation](https://pkg.go.dev/github.com/andoma-go/sanitize)

go.mod

@@ -0,0 +1,11 @@
+module github.com/andoma-go/sanitize
+
+go 1.21.4
+
+require github.com/stretchr/testify v1.8.4
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

go.sum

@@ -0,0 +1,10 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

sanitize.go

@@ -0,0 +1,60 @@
+package sanitize
+
+// Integer returns only numbers
+func Integer(input string) string {
+	runes := []rune{}
+	n := 0
+	for _, r := range input {
+		if !(r == 45) && !(r >= 48 && r <= 57) { // regexp.MustCompile(`[^-\d]`).ReplaceAllString(input, "$1")
+			continue
+		}
+		switch r {
+		case 45: // "-"
+			if n > 0 {
+				continue
+			}
+		default: // Digits
+			n++
+		}
+		runes = append(runes, r)
+	}
+	if n > 0 {
+		return string(runes)
+	}
+	return ""
+}
+
+// Float returns sanitized floating-point numbers
+func Float(input string) string {
+	runes := []rune{}
+	dot := false
+	n := 0
+	for i, r := range input {
+		if !(r >= 44 && r <= 46) && !(r >= 48 && r <= 57) { // regexp.MustCompile(`[^-\.,\d]`).ReplaceAllString(input, "$1")
+			continue
+		}
+		switch r {
+		case 45: // "-"
+			if n > 0 {
+				continue
+			}
+		case 44: // ","
+			fallthrough
+		case 46: // "."
+			if dot || i == len(input)-1 {
+				continue
+			}
+			dot = true
+			if n == 0 {
+				runes = append(runes, 48) // "0"
+			}
+		default: // Digits
+			n++
+		}
+		runes = append(runes, r)
+	}
+	if n > 0 {
+		return string(runes)
+	}
+	return ""
+}

sanitize_test.go

@@ -0,0 +1,61 @@
+package sanitize
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+// TestInteger tests the integer sanitize method
+func TestInteger(t *testing.T) {
+	t.Parallel()
+
+	var tests = []struct {
+		input    string
+		expected string
+	}{
+		{"45sDa8f$sd541zfa", "458541"},
+		{"a-bc12.3def987asdf--", "-123987"},
+		{"z,2134-59", "213459"},
+		{".,-", ""},
+	}
+
+	for _, test := range tests {
+		output := Integer(test.input)
+		assert.Equal(t, test.expected, output)
+	}
+}
+
+// BenchmarkInteger benchmarks the integer method
+func BenchmarkInteger(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		_ = Integer("a-bc12.3def987asdf--")
+	}
+}
+
+// TestFloat tests the float sanitize method
+func TestFloat(t *testing.T) {
+	t.Parallel()
+
+	var tests = []struct {
+		input    string
+		expected string
+	}{
+		{"45sDa8f$sd541zfa", "458541"},
+		{"a-bc12.3def987asdf--", "-12.3987"},
+		{"z,2134-59", "0,213459"},
+		{".,-", ""},
+	}
+
+	for _, test := range tests {
+		output := Float(test.input)
+		assert.Equal(t, test.expected, output)
+	}
+}
+
+// BenchmarkFloat benchmarks the float method
+func BenchmarkFloat(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		_ = Float("a-bc12.3def987asdf--")
+	}
+}