Custom directive added for authChecking

[Kajol-Kumari]

work done in this PR:

• If conditions for auth Checking will be replaced by directive.
• unit test written for this directive

All the logic goes in directive and code becomes more cleaner.

It is implementation of one of the idea introduced under GSOC'20 Idea List

GIF showing functionality working fine after doing the changes:

[codecov-io]

Codecov Report

Merging #302 into master will increase coverage by 0.18%.
The diff coverage is 92.85%.

@@            Coverage Diff             @@
##           master     #302      +/-   ##
==========================================
+ Coverage   50.62%   50.80%   +0.18%     
==========================================
  Files          66       67       +1     
  Lines        3771     3785      +14     
  Branches      444      445       +1     
==========================================
+ Hits         1909     1923      +14     
+ Misses       1767     1766       -1     
- Partials       95       96       +1     

Impacted Files	Coverage Δ
src/app/Directives/authcheck.directive.ts	92.85% <92.85%> (ø)
...bliclists/challengelist/challengelist.component.ts	47.57% <0.00%> (+0.97%)	⬆️

Impacted Files	Coverage Δ
src/app/Directives/authcheck.directive.ts	92.85% <92.85%> (ø)
...bliclists/challengelist/challengelist.component.ts	47.57% <0.00%> (+0.97%)	⬆️

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[RishabhJain2018]

@Sanji515 Can you please review this?

[Shekharrajak]

This is looking good and I am expecting similar directives to be implemented.

But think to make it modular: what if we want to have multiple conditions - as input for the directives ?

[Shekharrajak]

better selector name - a generic one

[Shekharrajak]

variable name should define the value it contains.
Try to make a input value for the directive.

[codecov-commenter]

Codecov Report

Merging #302 into master will increase coverage by 0.15%.
The diff coverage is 92.85%.

@@            Coverage Diff             @@
##           master     #302      +/-   ##
==========================================
+ Coverage   50.16%   50.32%   +0.15%     
==========================================
  Files          66       67       +1     
  Lines        3873     3887      +14     
  Branches      450      451       +1     
==========================================
+ Hits         1943     1956      +13     
  Misses       1836     1836              
- Partials       94       95       +1     

Impacted Files	Coverage Δ
src/app/Directives/authcheck.directive.ts	92.85% <92.85%> (ø)

Impacted Files	Coverage Δ
src/app/Directives/authcheck.directive.ts	92.85% <92.85%> (ø)

---

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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