From fb7eb570cf1529122bfb58923449ef8e5b20d3b5 Mon Sep 17 00:00:00 2001
From: Joseph Flasher <flasher@istrategylabs.com>
Date: Sun, 30 Mar 2014 16:20:46 -0400
Subject: [PATCH] Most of the way towards a cal implementation for #11

Using icalendar node lib to generate ics files server side. The major outstanding issue here is that solr is not returning the results I'd expect. I search for id="some_id" and it returns many results which don't contain the id. I think I am just missing something (hopefully) obvious.
---
 api/app.js                     | 53 ++++++++++++++++++++++++++++++++++
 api/package.json               | 12 ++++----
 sample-www/assets/js/fbopen.js | 24 +++++++++++----
 3 files changed, 79 insertions(+), 10 deletions(-)

diff --git a/api/app.js b/api/app.js
index d1cfe27..d3ae1c6 100644
--- a/api/app.js
+++ b/api/app.js
@@ -23,6 +23,8 @@ var express = require('express')
 	, request = require('request')
 	, qs = require('querystring')
 	, solr = require('solr-client')
+	, icalendar = require('icalendar')
+	, uuid = require('node-uuid')
 	, url = require('url')
 	, moment = require('moment') // momentjs.com
 	, S = require('string') // stringjs.com
@@ -247,6 +249,57 @@ app.get('/v0/opps', function(req, res) {
 
 });
 
+// Create a calendar event from record id
+app.get('/v0/cal/:id?', function(req, res) {
+	// Make sure we have a record id to retrieve
+	if (req.param('id') === undefined) {
+		return res.json(404, { error: 'Invalid record id supplied.' });
+	}
+
+	// start with base endpoint, then add query params
+	var solr_url = config.solr.base_url;
+	
+	// Adding the fq here to get rid of a links record that was being returned 
+	// unwantedly.
+	solr_url += '?q=id="' + req.param('id') + '"' +
+					'&fq=%2Bclose_dt%3A%5B*+TO+*%5D' +
+					'&fl=id,title,listing_url,close_dt,description' +
+					'&wt=json&indent=true';
+
+	// Search solor for our record
+	request(solr_url, function(err, resp, body) {
+
+		res.set('Access-Control-Allow-Origin', '*');
+		res.set('Content-Type', 'application/json;charset=utf-8');
+
+		if (!err && resp.statusCode == 200) {
+
+			var results_in = JSON.parse(body);
+			// Grab the first result, there should only be one if we're 
+			// correctly using a uid
+			var result = results_in.response.docs[0];
+			
+			// Got good results, create the calendar event
+			var ev = new icalendar.VEvent(uuid.v4());
+			ev.setSummary("FBOpen Deadline for " + result.title);
+
+			// We want the start date to be 1 hour before the closing time
+			var endDate = new Date(result.close_dt);
+			var startDate = new moment(result.close_dt);
+			startDate.subtract('hours', 1);
+			console.log(startDate.toDate(), endDate);
+			ev.setDate(startDate.toDate(), endDate);
+			ev.setDescription(result.description);
+			ev.addProperty('URL', result.listing_url);
+			res.setHeader('Content-Disposition', 'attachment; filename=fbopen.ics');
+			res.type('text/calendar');
+			res.end(ev.toString());
+		} else {
+			res.json(resp.statusCode, { error: err });
+		}
+	});
+});
+
 // translate solr facets into JSON
 // Strangely, Solr returns facets as a flat list of code/count pairs: e.g., NAICS code, count, NAICS code, count, ... etc.
 // This function creates a single JSON object, with a key for each code, where the value of that key is the count.
diff --git a/api/package.json b/api/package.json
index 0ff6515..0cab6d7 100644
--- a/api/package.json
+++ b/api/package.json
@@ -9,10 +9,12 @@
     "express": "3.3.4",
     "jade": "*",
     "less-middleware": ">=0.2.1-beta",
-		"request": "*",
-		"solr-client": "*",
-		"moment": "*",
-		"string": "*",
-		"http-auth": "*"
+    "request": "*",
+    "solr-client": "*",
+    "moment": "*",
+    "string": "*",
+    "http-auth": "*",
+    "icalendar": "0.6.5",
+    "node-uuid": "1.4.x"
   }
 }
diff --git a/sample-www/assets/js/fbopen.js b/sample-www/assets/js/fbopen.js
index e298821..30f452b 100644
--- a/sample-www/assets/js/fbopen.js
+++ b/sample-www/assets/js/fbopen.js
@@ -28,12 +28,15 @@
   var PAGESIZE = 10; // results per page -- fixed by the API, not customizable here
 
   // always call current version of the API (currently v0)
+  var api_base;
+  if (location.protocol == 'https:' && fbopen_config.API_SERVER_SSL) {
+    api_base = fbopen_config.API_SERVER_SSL + '/v0';
+  } else {
+    api_base = fbopen_config.API_SERVER + '/v0';
+  }
+
   $.ajaxPrefilter( function( options, originalOptions, jqXHR ) {
-    if (location.protocol == 'https:' && fbopen_config.API_SERVER_SSL) {
-      options.url = fbopen_config.API_SERVER_SSL + '/v0' + options.url;
-    } else {
-      options.url = fbopen_config.API_SERVER + '/v0' + options.url;
-    }
+    options.url = api_base + options.url;
   });
 
   // disable ajax caching in IE
@@ -196,6 +199,17 @@
             , 'html': true
           });
 
+          // Add handler for calendar event creation
+          $('.listing-dates').click(function () {
+            var id = $(this).parents(".result-item").attr("data-solr-id");
+            
+            // Make sure the record has a valid id
+            if (!id) {
+              return;
+            }
+            window.open(api_base + '/cal/' + id, 'FBOpen Calendar Event');
+          });
+
         });
       },
       // NOTE: this call to render_error will catch issues with accessing the API