ETC-Library website's backend

---

Geting started

Installation:

git clone https://github.com/ETC-development/etc-library-server
cd etc-library-server
yarn #or npm install

Setup:

1- Follow the instructions in the Google Drive API's documentations on how to create you oAuth2 credentials (Client_ID, Client_Secret) and how to use them to generate your Refresh_Token.

2- Create a Mongodb database and get its URL (example host: Mongodb Atlas)

3- After that, create your .env file where you'll put the secrets and credentials: cp .env.example .env

4- Fill the .env file with all the required keys

How it works?

Endpoints:

Endpoint	Method	Description	Request	Response
/	GET	A simple endpoint that just returns a hardcoded text to indicate that the API is working	/	"works"
/search	GET	Receives query parameters that provide the search query filters, validates them, and then sends paginated results	Query parameters: name: names of files or part of them (the API will return the files that have this as a substring of their names) type: type of the file (exams, tests, worksheets, resources, courses) year: the grade level of the file (1, 2, 3, 4 or 5) semester: the semester (1 or 2) that the file belongs to, requires to provide the "year" param module: name of the module that the files belong to (analysis 1, ...) limit: number of file objects to return (for pagination purpose) page: the page of the file objects to return according to the specified limit	Returns a json object that has these properties: files: array of File objects totalFileCounts: the total number of files that match the request query totalPages: the amount of pages that are made by splitting the results of the query with the provided limit currentPage: returns the same page given by the query error: an error message in case if something is wrong

What it does:

• When the server starts, it runs a recursive function that traverses all the folders in the given Google Drive API.
• Whenever the recursive function finds files (mimeType != folder), it passes them to a callback function which parses the path of the file into a File object and pushes it to an indexedFiles array.
• When all the folders are traversed, the files collection will get dropped, in order to avoid cases when our database would have info of files that have been deleted from the Drive.
• Finally, the indexedFiles array will be inserted into the files collection and the server Express will start listening to API calls.

---

License Information: AGPL3