Implement automated content filtering (User Story #1)

[mohamed-elzeni]

This adds an automated content filtering system to prevent users from creating posts that contain inappropriate words.

This is done by importing a predefined list of inappropriate words from the inappropriate-words.json file, where the module in src/filters.js has been created to perform that. Then, this module exposes the getInappropriateWords method to be used in loading these words when needed for filtering. A function was created for checking a given text against the list. And the text of any post or reply that the user attempts to post is first given to this function, and if it flags it as inappropriate, the user is given a warning message and prevented from posting.

This also adds comprehensive automated tests. Testing for this feature is explained in more detail in UserGuide.md.

The following files were added:

• inappropriate-words.json
• src/filters.js

And the following files were modified:

• src/topics/create.js
• test/posts.js

This resolves #2, #3, and #4, fully completing User Story 1 and resolving #18.

[coveralls]

Pull Request Test Coverage Report for Build 11428259809

Details

• 9 of 12 (75.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.007%) to 82.675%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/topics/create.js	6	9	66.67%

Totals
Change from base Build 11057241668:	-0.007%
Covered Lines:	22362
Relevant Lines:	25627

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💛 - Coveralls

[lhitmi]

The code looks very clear!

[akobaidan]

the code looks clear and effective.