Generate better JavaScript From Goa Design

Generate (better) JavaScript from Goa Design. This JavaScript has,

1. Explicit Method using Promise API
2. Validation
3. Type Annotation

https://github.com/shirou/goagen_js

1. Generate JavaScript
 From Goa Design Shirou WAKAYAMA (@r_rudi)
 Tsukinowa Inc. Better
2. Who? • Twitter: r_rudi • CTO at Tsukinowa Inc. • Ansible / Sphinx • 4 years Golang • Server / FrontEnd / Infra / Android
3. JS code generator: gen_js • JS code generator already included. • Hmm, it seems it does not have some of features…. • generate from swagger also. 
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   KT
   
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4. goagen_js • https://github.com/shirou/goagen_js • It generates ES 2015 code. • You need Babel to run Web Browser. 
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5. Sample Design WBS
   @
   
   3FTPVSDF VTFS
   GVOD
   \
   
   
   
   
   
   
   
   
   #BTF1BUI VTFS
   

   
   
   
   
   
   
   
   "DUJPO HFU
   GVOD
   \
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   3PVUJOH (&5 6TFS*%
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   1BSBNT GVOD
   \
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   1BSBN 6TFS*%
   *OUFHFS
   GVOD
   \
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   .BYJNVN 
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   ^
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   3FRVJSFE 6TFS*%
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   ^
6. 1. Explicit Method using 
 Promise API 
   6TFS(FU
   
   VTFS*% OVNCFS 
   6TFS*%
   UP
   HFU
   JOGPSNBUJPO
   FYQPSU
   GVODUJPO
   6TFS(FU VTFS*%
   \
   
   
   DPOTU
   VSM
   
   VSM1SFpY
   
   AVTFS\VTFS*%^A
   
   
   DPOTU
   F
   
   WWBMJEBUF W6TFS(FUVTFS*%
   VTFS*% 
   
   
   JG
   F
   \
   
   
   
   
   SFUVSO
   1SPNJTFSFKFDU F 
   
   
   ^
   
   
   SFUVSO
   HFU VSM 
   ^ utility function
7. 2. Validation • ` FYQPSU
   DPOTU
   6TFS(FU
   
   \
   
   
   
   6TFS*%
   \
   
   
   
   
   
   LJOE
   OVNCFS
   
   
   
   
   
   NBYJNVN
   
   
   
   
   ^
   
   ^
 
 
   WBMJEBUF
   DBO
   WBMJEBUF
   XJUI
   TQFDJpFE
   SVMF
   TFU
   FYQPSU
   GVODUJPO
   WBMJEBUF SVMF
   BDUVBM
   \

   
   
   
   TOJQ 
 ^
 Generated Rule Validator function
8. 3. Type annotation • flowtype • typescript 
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   UBSHFU
   UZQFTDSJQU
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9. 3. Typescript Example 
   6TFS(FU
   
   VTFS*% OVNCFS 
   6TFS*%
   UP
   HFU
   JOGPSNBUJPO
   FYQPSU
   GVODUJPO
   6TFS(FU VTFS*%
   OVNCFS 
   1SPNJTF6TFS.FEJB\
   
   
   DPOTU
   VSM
   
   VSM1SFpY
   
   AVTFS\VTFS*%^A
   
   
   MFU
   F
   
   WWBMJEBUF W6TFS(FUVTFS*%
   VTFS*% 
   
   
   JG
   F
   \
   
   
   
   
   SFUVSO
   1SPNJTFSFKFDU F 
   
   
   ^
   
   
   SFUVSO
   HFU VSM 
   ^
10. Conclusion • goagen_js can generate JS code with 1. Explicit Method Name with Promise 2. Validation 3. Type Annotation • but still under heavy development.