basic setup

libs/sass-utils/utils.js

@@ -0,0 +1,108 @@
+// https://github.com/dawaltconley/sass-cast/blob/main/utils.js
+
+import * as sass from 'sass-embedded'
+
+/**
+ * Check if string is quoted
+ * @private
+ * @param {string} str
+ * @return {boolean}
+ */
+export const isQuoted = (str) => /^['"].*['"]$/.test(str)
+
+/**
+ * Surrounds a string with quotes
+ * @private
+ * @param {string} str
+ * @param {string} q - quotes, double or single
+ * @return {string}
+ */
+export const quoteString = (str, q) => {
+    if (!q) return str
+    if (isQuoted(str)) {
+        q = str[0]
+        str = str.slice(1, -1)
+    }
+    let r = new RegExp(q, 'g')
+    return q + str.replace(r, '\\' + q) + q
+}
+
+/**
+ * Unquotes a string
+ * @private
+ * @param {string} str
+ * @return {string}
+ */
+export const unquoteString = (str) => (isQuoted(str) ? str.slice(1, -1) : str)
+
+/**
+ * Parse a string as a Sass object
+ * cribbed from davidkpiano/sassport
+ *
+ * @private
+ * @param {string} str
+ * @return {Value}
+ */
+export const parseString = (str) => {
+    let result
+
+    try {
+        sass.compileString(`$_: ___(${str});`, {
+            functions: {
+                '___($value)': (args) => {
+                    result = args[0]
+                    return result
+                },
+            },
+        })
+    } catch (e) {
+        return str
+    }
+
+    return result
+}
+
+/**
+ * Parse a string as a legacy Sass object
+ * cribbed from davidkpiano/sassport
+ *
+ * @private
+ * @param {string} str
+ * @return {LegacyObject}
+ */
+export const parseStringLegacy = (str) => {
+    let result
+
+    try {
+        sass.renderSync({
+            data: `$_: ___((${str}));`,
+            functions: {
+                '___($value)': (value) => {
+                    result = value
+                    return value
+                },
+            },
+        })
+    } catch (e) {
+        return str
+    }
+
+    return result
+}
+
+/**
+ * Function to handle 'toString()' methods with legacy API.
+ *
+ * @private
+ * @param {LegacyObject} obj
+ * @return {string}
+ */
+export const legacyToString = (obj) => (obj.dartValue || obj).toString()
+
+/**
+ * Return a value from an object and a list of keys.
+ * @private
+ * @param {Object|Array} obj
+ * @param {*[]} attrs
+ */
+export const getAttr = (obj, attrs) => attrs.reduce((o, attr) => o[attr], obj)