Working on analytics parsing

analytics/sql-tag.js

@@ -0,0 +1,48 @@
+
+const namedParams = require('named-placeholders')();
+
+function stripIndent (input) {
+  if (Array.isArray(input)) return input.map(stripIndent).join('');
+  const match = input.match(/^[^\S\n]*(?=\S)/gm);
+  const indent = match && Math.min(...match.map((el) => el.length));
+  if (indent) {
+    const regexp = new RegExp(`^.{${indent}}`, 'gm');
+    input = input.replace(regexp, '');
+  }
+
+  return input;
+}
+
+function isObject (input, strict = false) {
+  if (!input) return false;
+  if (typeof input !== 'object') return false;
+  if (Array.isArray(input)) return false;
+  if (!strict) return true;
+  if (!(input instanceof Object)) return false;
+  if (input.constructor !== Object.prototype.constructor) return false;
+  return true;
+}
+const isNotUndefinedOrNull  = (input) => input !== null && typeof input !== 'undefined';
+const valueOrEmpty = (input) => (isNotUndefinedOrNull(input) ? input : '');
+
+function withData (data) {
+  return function (...args) {
+    const query = sql(...args);
+    return namedParams(query, data);
+  };
+}
+
+function sql (strings, ...values) {
+  const input = strings.reduce((str, chunk, i) => (
+    str + chunk + valueOrEmpty(values[i])
+  ), '');
+  return stripIndent(input);
+}
+
+module.exports = exports = (...args) => {
+  if (args.length === 0 || (args.length === 1 && isObject(args[0]))) {
+    return withData(args[0] || {});
+  }
+  if (Array.isArray(args[0])) return sql(...args);
+  throw new TypeError('Unknown invocation of sql-tag');
+};