node v4+ rewrite; options validation

Author: Va1

index.js

@@ -1,38 +1,3 @@
-var _ = require('lodash');
-var loaderUtils = require('loader-utils');
+const processChuck = require('./lib/processChunk')
 
-function processOptions(source, options) {
-  if (!_.isUndefined(options.search) && !_.isUndefined(options.replace)) {
-    var search = options.search;
-
-    if (!_.isUndefined(options.flags)) {
-      search = new RegExp(options.search, options.flags);
-    }
-
-    var newSource = source.replace(search, options.replace);
-    if (options.strict && (newSource === source)) {
-      throw new Error('Cannot replace ' + options.search + ' → ' + options.replace);
-    }
-  } else if (options.strict) {
-    throw new Error('Cannot replace: undefined search or/and option(s) → ' + JSON.stringify(options));
-  }
-
-  return newSource;
-}
-
-module.exports = function (source, map) {
-  this.cacheable();
-
-  var options = loaderUtils.getOptions(this);
-
-  if (_.isArray(options.multiple)) {
-    options.multiple.forEach(function (suboptions) {
-      suboptions.strict = (!_.isUndefined(suboptions.strict) ? suboptions.strict : options.strict);
-      source = processOptions(source, suboptions);
-    });
-  } else {
-    source = processOptions(source, options);
-  }
-
-  this.callback(null, source, map);
-};
+module.exports = processChuck

lib/getOptionsArray.js

@@ -0,0 +1,50 @@
+const { getOptions } = require('loader-utils')
+const validateOptions = require('schema-utils')
+
+const loaderName = 'string-replace-loader'
+
+const optionsSchema = {
+  type: 'object',
+  properties: {
+    search: {
+      type: 'string'
+    },
+    replace: {
+      type: 'string'
+    },
+    flags: {
+      type: 'string',
+    },
+    strict: {
+      type: 'boolean'
+    }
+  },
+  additionalProperties: false
+}
+
+const defaultOptions = {
+  search: null,
+  replace: null,
+  flags: null,
+  strict: false
+}
+
+function getOptionsArray (config) {
+  const rawOptions = getOptions(config)
+  const rawOptionsArray = (
+    typeof rawOptions.multiple !== 'undefined'
+      ? rawOptions.multiple
+      : [rawOptions]
+  )
+  const optionsArray = []
+
+  for (const optionsIndex in rawOptionsArray) {
+    validateOptions(optionsSchema, rawOptionsArray[optionsIndex], loaderName)
+
+    optionsArray[optionsIndex] = Object.assign({}, defaultOptions, rawOptionsArray[optionsIndex])
+  }
+
+  return optionsArray
+}
+
+module.exports = getOptionsArray

lib/processChunk.js

@@ -0,0 +1,17 @@
+const getOptionsArray = require('./getOptionsArray')
+const replace = require('./replace')
+
+function processChunk (source, map) {
+  this.cacheable()
+
+  const optionsArray = getOptionsArray(this)
+  let newSource = source
+
+  for (const options of optionsArray) {
+    newSource = replace(newSource, options)
+  }
+
+  this.callback(null, newSource, map)
+}
+
+module.exports = processChunk

lib/replace.js

@@ -0,0 +1,23 @@
+
+function replace (source, options) {
+  const { replace, flags, strict } = options
+  const search = (
+    flags === null
+      ? options.search
+      : new RegExp(options.search, flags)
+  )
+
+  if (strict && (search === null || replace === null)) {
+    throw new Error('Replace failed (strict mode) : options.search and options.replace are required')
+  }
+
+  const newSource = source.replace(search, replace)
+
+  if (strict && (newSource === source)) {
+    throw new Error('Replace failed (strict mode) : ' + options.search + ' → ' + options.replace)
+  }
+
+  return newSource
+}
+
+module.exports = replace