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-# edx-adapt
-Adaptive problem selection interface for EdX courses
+# Adaptive problem selection interface for EdX courses
+
+[![Travis](https://img.shields.io/travis/raccoongang/edx-adapt.svg)](https://travis-ci.org/raccoongang/edx-adapt) [![Code Climate](https://img.shields.io/codeclimate/github/raccoongang/edx-adapt.svg)](https://codeclimate.com/github/raccoongang/edx-adapt)
+
+## Installation
+
+Edx-Adapt application requires
+[MongoDB](https://docs.mongodb.com/manual/administration/install-on-linux/)
+database.
+
+Clone edx-adapt project to your server and switch to the project
+directory:
+
+```bash
+> git clone git@github.com:raccoongang/edx-adapt.git@<tag_stable_version>
+> cd edx-adapt
+```
+
+Create virtual environment:
+
+```bash
+> virtualenv env_name
+```
+
+Activate virtual environment and install all requirements:
+
+```bash
+> source env_name/bin/activate
+> pip install -r requirements
+```
+
+## Run edx-adapt application in development mode:
+
+```
+> python edx_adapt.py
+```
+
+
+## Run edx-adapt application in production mode
+
+There are few sample config files in `etc/folder` required to configure
+production environment.
+
+`etc/nginx/` contains template file to configure nginx server
+
+`etc/edx_adapt/` contains template file to configure uwsgi server for
+edx-adapt
+
+`etc/init/` contains template file to configure edx-adapt be proceed by
+service manager
+
+## Main API endpoints
+
+`/api/v1/course`
+
+- GET: Show all courses registered in Edx-Adapt
+ - `response.data = {'course_ids': courses}`
+- POST: Create new course in Edx-Adapt
+ - Parameters: `course_id` (string)
+
+
+`/api/v1/course/<course_id>/skill`
+
+- GET: Show all skills which course `<course_id>` contains.
+ - `response.data = {'skills': skills}`
+- POST: Add skill into course `<course_id>`
+ - Parameters : `skill_name` (string)
+
+
+`/api/v1/course/<course_id>/user`
+
+- GET: Show all users registered in the course `<course_id>`
+ - `response.data = {'users': {'finished': finished_users, 'in_progress':
+progress_users}}`
+- POST: Enroll new user in the course `<course_id>`
+ - Parameters: `user_id` (string)
+
+
+`/api/v1/course/<course_id>`
+
+- GET: Show all problems contained to the course `<course_id>`
+ - `response.data = {'problems': problems}`
+- POST: Add new problem in the course `<course_id>`
+ - Parameters: `problem_name` (string), `tutor_url` (string), `skills`
+(list of strings), `pretest` (boolean), `posttest` (boolean)
+
+
+`/api/v1/course/<course_id>/skill/<skill_name>`
+
+- GET: Show all problems contained in the course `<course_id>` related
+to the skill `<skill_name>`
+ - `response.data = {'problems': problems}`
+
+
+`/api/v1/course/<course_id>/experiment`
+
+- GET: Show result of all experiments for the course `<course_id>`
+ - `response.data = {'experiments': exps}`
+
+
+`/api/v1/course/<course_id>/probabilities`
+
+- GET: Show list with default BKT model parameters added to the course
+`<course_id>`
+ - `response.data = {'model_params': prob_list}`
+
+- POST: Add new or update existing model parameters in the course
+`<course_id>`
+ - Parameters: `prob_list` (list of dicts with models parameters)
+`[{threshold: float, pg: float, ps: float, pi: float, pt: float}, ...]`
+
+
+`/api/v1/course/<course_id>/user/<user_id>/interaction`
+
+- POST: Add user's interaction with Edx into Edx-Adapt
+ - Parameters: `problem` (string), `correct` (int), `attempt` (int),
+`unix_seconds` (string)
+
+
+`/api/v1/course/<course_id>/user/<user_id>`
+
+- GET: Show user's status:
+ - `reponse.data = {
+    "next": next_problem, "current": current_problem,
+    "done_with_current": done_with_current, "okay": okay,
+    "done_with_course": done_with_course
+}`
+
+
+`/api/v1/course/<course_id>/user/<user_id>/pageload`
+
+- POST: Add logging information about problem visited by user into
+Edx-Adapt
+ - Parameters: `problem` (string), `unix_seconds` (string)
+
+
+`/api/v1/parameters/bulk`
+
+- POST: Add BKT model parameters to each course's skill for the user
+ - Parameters: `course_id` (string), `user_id` (string), `skills_list`
+(list of strings)
+
+
+`/api/v1/data/logs/course/<course_id>/user/<user_id>/problem/<problem_name>`
+
+- GET: Show collected log data for users `<user_id>` interaction with
+problem `<problem_name>` on the course `<course_id>`
+ - `response.data = {'log': problem log}`
+
+
+`/api/v1/data/logs/course/<course_id>/user/<user_id>`
+
+- GET: Show all collected log data for user `<user_id>` interaction on
+the course `<course_id>`
+ - `response.data = {'log': log data}`
+
+
+`/api/v1/data/logs/course/<course_id>`
+
+- GET: Show all collected data for every user with status "in progress"
+on the course `<course_id>`
+ - `response.data = {'log': log data}`
+
+
+`/api/v1/data/logs/course/<course_id>/experiment/<experiment_name>`
+
+- GET: Show all collected log data for users successfully passed
+experiment `<experiment_name>` on the course `<course_id>`
+ - `response.data = {'log': log data}`
+
+
+`/api/v1/data/trajectory/course/<course_id>/user/<user_id>`
+
+- GET: Show trajectory of the user `<user_id>` interaction with the
+course `<course_id>`
+ - `response.data = {'data': {}, 'trajectories': {}, 'pretest_length':
+ {}, 'posttest_length': {}}`
+
+
+`/api/v1/data/trajectory/course/<course_id>`
+- GET: Show trajectory for all users with status "in progress" in the
+course `<course_id>`
+ - `response.data = {<user_id_1>: {'data': {}, 'trajectories': {},
+ 'pretest_length': {}, 'posttest_length': {}}, <user_id_2>: {}, ...}`
+
+
+## Data models stored in the database
+
+Data stored in MongoDB as documents, which are represented as JSON
+objects.
+
+Edx-adapt uses one database and 4 collections for each Course. Two
+collections are generic for all courses and two collections are created
+specifically for certain course.
+
+### Generic collections are: `Courses` and `Generic`
+
+#### `Courses` collection stores documents with base information about the course:
+
+```js
+{
+    _id: ObjectID(),  // document's unique id, generated by MongoDB itself
+    users_finished: [],  // list of users who have finished course
+    skills: [],  // list of course's skills
+    problems: [  // list of course's problems
+        {  // dict describes the problem
+            skills: [],  // list of skills related to the problem
+            pretest: false,  // boolean flag to show if problem is pretest
+            posttest: false,  // boolean flag to show if problem is posttest
+            tutor_url: <problem_url>,  // problem's url. E.g. on the Open edX course
+        },
+        ...
+    ],
+    users_in_progress: [],  // list of "in progress" users
+    experiments: [  // list of experiments definitions
+        {
+            experiment_name: <string>,
+            start_time: <Int32>,
+            end_time: <Int32>
+        },
+        ...
+    ],
+    course_id: <string>,  // unique course id
+    model_params: [  // list with model's parameters
+        {
+            threshold: <double>,  // <double> is bson float type
+            pg: <double>,
+            ps: <double>,
+            pi: <double>,
+            pt: <double>,
+        },
+        ...
+    ],
+}
+```
+
+#### `Generic` collection stores all student - skills related data:
+
+
+```js
+{
+    _id: ObjectID(),
+    key: <string>,  // unique compound key, which contains <course_id>, <user_id>, and <skill_name>
+    val: {
+          threshold: <double>,
+          pg: <double>,
+          ps: <double>,
+          pi: <double>,
+          pt: <double>,
+    }
+}
+```
+
+### Course specific collections
+
+#### `<course_id>_log` collects all logs about students' interactions
+
+Adaptive logging includes page load data and student's responses on
+problems questions.
+
+##### Interaction log doc:
+
+```js
+{
+     _id: ObjectID(),
+     unix_s: <Int32>,
+     attempt: <Int32>,
+     student_id: <string>,
+     timestamp: <string>,
+     problem: {
+         skills: [],
+         pretest: false,
+         posttest: false,
+         tutor_url: <problem_url>,
+    },
+    type: "response",
+    correct: 0  // possible values 1 and 0 for correct and incorrect answers correspondingly
+}
+```
+
+##### Page load log doc:
+
+```js
+{
+     _id: ObjectID(),
+     unix_s: <Int32>,
+     student_id: <string>,
+     timestamp: <string>,
+     problem: {
+         skills: [],
+         pretest: false,
+         posttest: false,
+         tutor_url: <problem_url>,
+    },
+    type: "page_load"
+}
+```
+
+#### `<course_id>_problems` is a collection with the student's current status
+
+Status includes problems which were selected by Edx-Adapt for the
+student on every step through the adaptive course
+
+```js
+{
+     _id: ObjectID(),
+     current: {  // could be problem described dict or null object
+          problem: {
+          skills: [],
+          pretest: false,
+          posttest: false,
+          tutor_url: <problem_url>,
+     },
+     next: null,  // Possible values: dict with problem description, null.
+     student_id: <string>,
+     perm: false,  // (experimental attribute) boolean flag shows if student has permissions for fluent navigation.
+                   // Permission is changed after student start to answer on post-assessment problems
+     nav: "adapt"  // Save initial student permission. Possible value "adapt" and "free", "adapt" is default behavior
+                   // (perm == false), "free" (perm == true) student had permissions for free navigation through
+                   // adaptive problems
+}
+```