Add menssa parser

src/menu-parser/index.ts

@@ -2,7 +2,7 @@ import { inspect } from 'util';
 import parsers from './parsers';
 import { Property } from './utils';
 
-interface MenuItem {
+export interface MenuItem {
   day: string;
   courses: Array<{
     title: string;

src/menu-parser/parsers/index.ts

@@ -8,6 +8,7 @@ import ravioli from './ravioli';
 import fazer from './fazer';
 import kipsari from './kipsari';
 import restel from './restel';
+import menssa from './menssa';
 
 import { Parser } from '../index';
 
@@ -21,7 +22,8 @@ const parsers: Array<Parser> = [
   ravioli,
   fazer,
   kipsari,
-  restel
+  restel,
+  menssa
 ];
 
 export default parsers;

src/menu-parser/parsers/menssa.ts

@@ -0,0 +1,88 @@
+import { MenuItem, Parser } from '..';
+import {
+  createPropertyNormalizer,
+  Property,
+  propertyRegex,
+  text
+} from '../utils';
+import { JSDOM } from 'jsdom';
+import * as moment from 'moment';
+
+const propertyMap = {
+  L: Property.LACTOSE_FREE,
+  M: Property.MILK_FREE,
+  G: Property.GLUTEN_FREE,
+  V: Property.VEGETARIAN,
+  S: Property.HEALTHIER_CHOICE
+};
+
+const normalizeProperties = createPropertyNormalizer(propertyMap);
+
+// match a date in the format of DD.MM.YYYY
+const dateRegex = /\b\d{1,2}\.\d{1,2}\.\d{4}\b/;
+
+// match properties in course's name
+const coursePropertiesRegex = /\(([A-Za-z]+(?:,\s?)?)+\)$/;
+
+// split multiple courses in one line, e.g. "RIISI (V,G,S) PERUNAMUUSI (L,G,S)"
+const coursesSplitRegex = /[^()]+\([^()]*\)|[^()]+/g;
+
+const parser: Parser = {
+  pattern: /menssa.fi/,
+  async parse(url, lang) {
+    // no english menu available
+    if (lang !== 'fi') {
+      return [];
+    }
+
+    const html = await text(url);
+
+    const { document } = new JSDOM(html, {
+      features: { QuerySelector: true }
+    }).window;
+    const nodeList = document.querySelectorAll('h3, p');
+
+    const courseList: Array<MenuItem> = [];
+    let isParsingCoursesFlag = false;
+
+    for (const dom of nodeList) {
+      // if the element is h3, stop parsing courses and reset the flag
+      if (dom.nodeName === 'H3') {
+        isParsingCoursesFlag = false;
+        continue;
+      }
+
+      const elementText: string = dom.textContent.trim();
+      // if the element is p and matches a date, set the falg to true, start parsing courses from the next element
+      if (dom.nodeName === 'P' && elementText.match(dateRegex)) {
+        isParsingCoursesFlag = true;
+
+        const date = moment(elementText, 'DD.MM.YYYY');
+        courseList.push({ day: date.format('YYYY-MM-DD'), courses: [] });
+        continue;
+      }
+
+      // if the element is p and the flag is active, parse course details
+      if (dom.nodeName === 'P' && isParsingCoursesFlag === true) {
+        // multiple courses may apperar on one line, so split the text
+        const courses = elementText.match(coursesSplitRegex) || [];
+
+        // iterate through all courses on the same line
+        courses.forEach(courseText => {
+          const properties = courseText.match(coursePropertiesRegex);
+
+          courseList[courseList.length - 1].courses.push({
+            title: courseText.replace(coursePropertiesRegex, '').trim(),
+            properties: properties
+              ? normalizeProperties(properties[0].match(propertyRegex))
+              : []
+          });
+        });
+      }
+    }
+
+    return courseList;
+  }
+};
+
+export default parser;