vendor strcase from: 3605ed457b

utils/strcase/snake.go

@@ -0,0 +1,94 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015 Ian Coleman
+ * Copyright (c) 2018 Ma_124, <github.com/Ma124>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, Subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or Substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+// Package strcase converts strings to snake_case or CamelCase
+package strcase
+
+import (
+	"strings"
+)
+
+// Converts a string to snake_case
+func ToSnake(s string) string {
+	return ToDelimited(s, '_')
+}
+
+// Converts a string to SCREAMING_SNAKE_CASE
+func ToScreamingSnake(s string) string {
+	return ToScreamingDelimited(s, '_', true)
+}
+
+// Converts a string to kebab-case
+func ToKebab(s string) string {
+	return ToDelimited(s, '-')
+}
+
+// Converts a string to SCREAMING-KEBAB-CASE
+func ToScreamingKebab(s string) string {
+	return ToScreamingDelimited(s, '-', true)
+}
+
+// Converts a string to delimited.snake.case (in this case `del = '.'`)
+func ToDelimited(s string, del uint8) string {
+	return ToScreamingDelimited(s, del, false)
+}
+
+// Converts a string to SCREAMING.DELIMITED.SNAKE.CASE (in this case `del = '.'; screaming = true`) or delimited.snake.case (in this case `del = '.'; screaming = false`)
+func ToScreamingDelimited(s string, del uint8, screaming bool) string {
+	s = addWordBoundariesToNumbers(s)
+	s = strings.Trim(s, " ")
+	n := ""
+	for i, v := range s {
+		// treat acronyms as words, eg for JSONData -> JSON is a whole word
+		nextCaseIsChanged := false
+		if i+1 < len(s) {
+			next := s[i+1]
+			if (v >= 'A' && v <= 'Z' && next >= 'a' && next <= 'z') || (v >= 'a' && v <= 'z' && next >= 'A' && next <= 'Z') {
+				nextCaseIsChanged = true
+			}
+		}
+
+		if i > 0 && n[len(n)-1] != del && nextCaseIsChanged {
+			// add underscore if next letter case type is changed
+			if v >= 'A' && v <= 'Z' {
+				n += string(del) + string(v)
+			} else if v >= 'a' && v <= 'z' {
+				n += string(v) + string(del)
+			}
+		} else if v == ' ' || v == '_' || v == '-' {
+			// replace spaces/underscores with delimiters
+			n += string(del)
+		} else {
+			n = n + string(v)
+		}
+	}
+
+	if screaming {
+		n = strings.ToUpper(n)
+	} else {
+		n = strings.ToLower(n)
+	}
+	return n
+}