Created posts search function in new file src/topics/search.js

[njouud]

This pull request addresses the sub-issue #42 of issue #20 relating to back-end code for User Story 3 (post search functionality). Later commits also address the other sub-issue #43 concerning testing.

Using the user search implementation in src/user/search.js as a guide, I made a new file src/topics/search.js and added search function Topics.search.

Topics.postSearch function: takes user input data (which is an object containing the query or search word, tid which is the topic id, and uid), and returns an object that contains matchCount the number of filtered posts,posts an array of post arrays containing the filtered posts found, timing the time it took to search, and the pageCount of the search result.

Already-exisitng functions utilized:
getTopicPosts: in src/topics/posts.js, returns an array of arrays of post objects belonging to a topic.
getTopicData: in src/topics/data.js, returns the fields of a topic object like tid (topic id).
Both essential for a posts searching mechanism.

Addressing progress in testing (sub-issue #43): test code has been written, however, repeatedly faced error of "topics.postSearch is not a function", will resolve in sprint 2.

[coveralls]

Pull Request Test Coverage Report for Build 11051124241

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This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

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Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 4 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.02%) to 82.626%

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Files with Coverage Reduction	New Missed Lines	%
src/meta/errors.js	1	76.74%
src/user/approval.js	3	87.61%

Totals
Change from base Build 11038472453:	-0.02%
Covered Lines:	22329
Relevant Lines:	25596

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💛 - Coveralls

[rkensouh]

All good! Ready to complete the other tasks.

[hibaabdullahhamad]

Great work! Approved.