More validation and refactor

[koriym]

No description provided.

[codecov-io]

Codecov Report

Merging #22 (dcbf6f9) into master (60c0787) will increase coverage by 1.36%.
The diff coverage is 97.77%.

@@             Coverage Diff              @@
##             master      #22      +/-   ##
============================================
+ Coverage     96.80%   98.16%   +1.36%     
- Complexity      139      144       +5     
============================================
  Files            14       13       -1     
  Lines           375      381       +6     
============================================
+ Hits            363      374      +11     
+ Misses           12        7       -5     

Flag	Coverage Δ	Complexity Δ
php	98.16% <97.77%> (+1.36%)	0.00 <15.00> (ø)

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Impacted Files	Coverage Δ	Complexity Δ
src/DumpDocs.php	98.86% <ø> (ø)	26.00 <0.00> (?)
src/Link.php	100.00% <ø> (+14.28%)	3.00 <0.00> (-2.00)	⬆️
src/TransDescriptor.php	100.00% <ø> (+21.42%)	4.00 <0.00> (-1.00)	⬆️
src/DrawDiagram.php	96.15% <83.33%> (ø)	18.00 <1.00> (?)
src/AlpsProfile.php	96.25% <100.00%> (+0.47%)	37.00 <5.00> (+6.00)
src/DescriptorScanner.php	100.00% <100.00%> (+3.22%)	23.00 <6.00> (+4.00)
src/Edge.php	100.00% <100.00%> (ø)	9.00 <1.00> (ø)
src/IndexPage.php	100.00% <100.00%> (ø)	4.00 <2.00> (ø)

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