Implement mass commands for sale

[hakujitsu]

Closes #150

Changes made

• Refactor Sale class to contain person
  • Previously, the Sale model was refactored such that sale would no longer contain the person, only the id.
  • This poses issues when trying to print the buyer name.
  • Hence, the Sale model is refactored to include the Person. The JSONAdaptedSale is not affected, and will continue to store the person id.
  • When a person is edited, the list of sales is iterated through, and any relevant sales are updated with the new edited person.
• Implement mass commands for sale add, sale delete and sale edit
  • sale add now has the ability to specify multiple buyers using c/1 c/2 c/3
  • sale delete now has the ability to delete multiple sales using s/1 s/2 s/3
  • sale edit now has the ability to edit multiple sales using s/1 s/2 s/3
• Add test for EditCommandParser for sale edit

sale delete Demo

sale edit Demo

sale add Demo

[codecov-io]

Codecov Report

Merging #150 into master will increase coverage by 1.16%.
The diff coverage is 91.66%.

@@             Coverage Diff              @@
##             master     #150      +/-   ##
============================================
+ Coverage     73.67%   74.84%   +1.16%     
- Complexity     1250     1297      +47     
============================================
  Files           170      171       +1     
  Lines          4118     4226     +108     
  Branches        571      586      +15     
============================================
+ Hits           3034     3163     +129     
+ Misses          887      857      -30     
- Partials        197      206       +9     

Impacted Files	Coverage Δ	Complexity Δ
...main/java/seedu/address/commons/core/Messages.java	0.00% <ø> (ø)	0.00 <0.00> (ø)
src/main/java/seedu/address/model/Model.java	100.00% <ø> (ø)	10.00 <0.00> (ø)
...u/address/logic/parser/sale/EditCommandParser.java	79.41% <66.66%> (+79.41%)	13.00 <0.00> (+13.00)
src/main/java/seedu/address/model/sale/Sale.java	91.37% <75.00%> (+0.30%)	26.00 <1.00> (ø)
...dress/logic/commands/sale/MassSaleCommandUtil.java	76.92% <76.92%> (ø)	5.00 <5.00> (?)
...address/logic/parser/sale/DeleteCommandParser.java	87.50% <80.00%> (-12.50%)	3.00 <2.00> (+1.00)	⬇️
.../seedu/address/logic/commands/sale/AddCommand.java	85.45% <91.17%> (+1.24%)	17.00 <5.00> (+7.00)
.../java/seedu/address/model/sale/UniqueSaleList.java	62.72% <91.66%> (+7.78%)	30.00 <8.00> (+7.00)
...seedu/address/logic/commands/sale/EditCommand.java	94.78% <93.33%> (+3.01%)	21.00 <3.00> (+7.00)
...edu/address/logic/commands/sale/DeleteCommand.java	92.50% <96.77%> (+4.03%)	15.00 <5.00> (+5.00)
... and 12 more

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[jmleong666]

LGTM!