Remove SvgJSON data type

[r-weng]

Proposed Changes

This pull request removes the SvgJSON data type, previously defined in app/Database/Tables.hs, and refactors any related code to use a tuple of texts, shapes, and paths instead of SvgJSON. This pull request also creates parseGraphJSON, a helper function used in saveGraphJSON of app/Controllers/Graph.hs and runGetGraphJSONTest of backend-test/Controllers/GraphControllerTests.hs.

Type of Change

(Write an X or a brief description next to the type or types that best describe your changes.)

Type	Applies?
🚨 Breaking change (fix or feature that would cause existing functionality to change)
✨ New feature (non-breaking change that adds functionality)
🐛 Bug fix (non-breaking change that fixes an issue)
🎨 User interface change (change to user interface; provide screenshots)
♻️ Refactoring (internal change to codebase, without changing functionality)	X
🚦 Test update (change that only adds or modifies tests)
📦 Dependency update (change that updates a dependency)
🔧 Internal (change that only affects developers or continuous integration)

Checklist

(Complete each of the following items for your pull request. Indicate that you have completed an item by changing the [ ] into a [x] in the raw text, or by clicking on the checkbox in the rendered description on GitHub.)

Before opening your pull request:

• I have performed a self-review of my changes.
  • Check that all changed files included in this pull request are intentional changes.
  • Check that all changes are relevant to the purpose of this pull request, as described above.
• I have added tests for my changes, if applicable.
  • This is required for all bug fixes and new features.
• I have updated the project documentation, if applicable.
  • This is required for new features.
• If this is my first contribution, I have added myself to the list of contributors.
• I have updated the project Changelog (this is required for all changes).

After opening your pull request:

• I have verified that the CircleCI checks have passed.
• I have requested a review from a project maintainer.

Questions and Comments

(Include any questions or comments you have regarding your changes.)

[coveralls]

Coverage Report for CI Build 0

Coverage increased (+0.04%) to 58.298%

Details

• Coverage increased (+0.04%) from the base build.
• Patch coverage: 12 of 12 lines across 2 files are fully covered (100%).
• 13 coverage regressions across 1 file.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

13 previously-covered lines in 1 file lost coverage.

File	Lines Losing Coverage	Coverage
app/Database/Tables.hs	13	72.64%

---

Coverage Stats

Relevant Lines:	3947
Covered Lines:	2360
Line Coverage:	59.79%
Relevant Branches:	964
Covered Branches:	503
Branch Coverage:	52.18%
Branches in Coverage %:	Yes
Coverage Strength:	163.54 hits per line

---

💛 - Coveralls

[david-yz-liu]

Please update the Database.Tables imports you changed so that they explicitly name what's being imported (this will help improve the code quality throughout)

[david-yz-liu]

Rename to parseGraphComponentsJSON and move this into the graph model file

[david-yz-liu]

rename svg into components

[r-weng]

I have made the requested changes. I'm not sure if there are any rules for structuring imports (indenting, new lines) I should adhere to though.

[david-yz-liu]

Nice work, @r-weng! The import style is good (and we can later apply a code formatter for the Haskell files to ensure consistent formatting).