Removing kulu-website and kulu-mobile

* They’ve been moved back to their individual repos
* This repo now only contains contents from backend
* This repo name should eventually be renamed to be called kulu-backend

Author: kitallis

backend/Procfile Procfile

@@ -1,16 +1,144 @@
-# kulu
-Service and mobile app for handling corporate reimbursements
+# kulu-backend
 
-- The backend is written in clojure and can be found [here](https://github.com/nilenso/kulu/tree/readme/backend)
-- The rails front end can be found [here](https://github.com/nilenso/kulu/tree/master/website)
-- The android app can be found [here](https://github.com/nilenso/kulu/tree/master/android)
+The main backend service for the Kulu app.
 
-All the info on how to set up and get things started are mentioned in the readmes of the respective services.
+## Set up
 
-# Update
+* Clone the app
 
-Making this a monolith was a bad idea. We're planning to migrate these back into individual repos. Steps:
+* Create the secret config from the sample:
+```
+cp config/kulu-backend-secrets-sample.edn config/kulu-backend-secrets.edn
+```
+* Fill in the placeholder vals in the above file. Read on to learn
+  more about our configuration management.
 
-1. Remove `website` and `mobile` from this monolith repo
-2. Rename this repo to become the new kulu-backend
-3. Deprecate https://github.com/nilenso/kulu-backend
+* Ensure that you're running postgres 9.5 or 9.6 (postgres >=10 is not supported)
+* Set up dev and test dbs:
+```
+$ psql
+create database kulu_backend_dev;
+\c kulu_backend_dev
+create extension "uuid-ossp";
+
+create database kulu_backend_test;
+\c kulu_backend_test
+create extension "uuid-ossp";
+```
+* `lein deps` to get all the dependencies
+* Migration script expects DATABASE_URL in the enviroment
+```
+DATABASE_URL=postgres://$USER\:@localhost:5432/kulu_backend_dev lein clj-sql-up migrate
+```
+
+### Running
+
+In dev, run `bin/server-start`. It sets up some needed env vars and
+starts the server with lein. Or you can directly run `lein run -m kulu-backend.web 3001
+` (takes defaults for the env vars).
+
+Once started, visit [http://localhost:3001/](http://localhost:3001/)
+
+#### In heroku
+
+* Push to heroku with `git push heroku master`
+* Interact on
+  [kulu-backend.herokuapp.com](https://kulu-backend.herokuapp.com).
+* To run migrations, `heroku run lein clj-sql-up migrate`
+
+## Developer info
+
+### Peculiarities in requests and responses
+
+You may have noticed that our HTTP requests come in with
+`under_scored` params but everywhere inside the app we use the
+`kabab-case`. This is done with
+`kulu-backend.utils.api/idiomatize-keys` and it's friends:
+
++ On incoming HTTP requests (at the handler level) we convert params
+  to the `kabab-case` (`dasherize` them).
++ Once the response is ready, we convert the response body back to the
+  `under_score` flavor.
+
+See example [here](src/kulu_backend/handler.clj) and read the
+[code documentation here](src/kulu_backend/utils/api.clj) for more
+details.
+
+Similarly, we apply the inverse transform (`under_scorize` on the way
+in, `dasherize` on the way out) while sending data to SQL.
+
+### Configuration
+
+We use [nomad](https://github.com/james-henderson/nomad) to read our
+app's configuration from edn files. The config related files are:
+
+#### Database
+
+In prod, we read the `DATABASE_URL` env var. The dev and test
+databases are specified in the config. In test, every DB command is
+run in a transaction and rolled back after the test, so we always a
+clean slate.
+
+The connection string in test comes from Nomad configs
+
+(expand further)
+
+#### AWS
+
+We use seperate IAM accounts for dev and prod (we stub out AWS usage
+in test).
+
+See the AWS Console's IAM tab (for [email protected]) for the various
+IAM accounts we use. Similarly we have separate S3 buckets and SQS
+queues for dev/prod and IAM account's permissions make sure that the
+dev AWS IAM account can't read/write from the prod resources and vice-versa.
+
+#### ElasticSearch
+
+###### OS X
++ `brew install elasticsearch`
+
++ Install the KOPF UI plugin to handle all ES administration: https://github.com/lmenezes/elasticsearch-kopf in `/usr/local/var/lib/elasticsearch/plugins`
+
++ `$ lein run -m kulu-backend.tasks setup dev` to migrate indices.
+
++ Run `elasticsearch`
+
+###### Elsewhere
+
++ Go to http://www.elasticsearch.com/download/ and download the latest version of elasticsearch (assumingly as zip).
+
++ unzip it.
+
++ `chmod +x bin/elasticsearch`
+
++ `$ lein run -m kulu-backend.tasks setup dev` to migrate indices.
+
++ `bin/elasticsearch`
+
++ this starts a process that binds to port 9200.
+
++ `curl -X GET http://localhost:9200/`
+
+to get something like:
+
+    {
+      "status" : 200,
+      "name" : "Mop Man",
+      "version" : {
+        "number" : "1.3.4",
+        "build_hash" : "a70f3ccb52200f8f2c87e9c370c6597448eb3e45",
+        "build_timestamp" : "2014-09-30T09:07:17Z",
+        "build_snapshot" : false,
+        "lucene_version" : "4.9"
+        },
+      "tagline" : "You Know, for Search"
+     }
+
++ Or install the KOPF UI in your plugins directory from: https://github.com/lmenezes/elasticsearch-kopf
+
+### Tests
+
+Run `lein test` to run tests. It will automatically set the `NOMAD_ENV=test` and pick up the right configuration.
+
+Make sure you run `elasticsearch` before running tests, as some of the tests in the suite test end-to-end making real calls to ES on a test index.