seandunford / bjjmath

A go webscraper and api that allows you to predict a winner in a bjj match based on data from BjjHeroes

How to Run

• Clone repo
• go mod tidy
• mkdir output && mkdir output/html && output/csv

References

• https://go.dev/doc/faq#git_https
• https://github.com/libsql/libsql-client-go/blob/main/examples/sql/counter/main.go

Deps

• http://go-colly.org/docs/introduction/install/

LibSQL

https://github.com/tursodatabase/libsql/blob/main/libsql-server/docs/BUILD-RUN.md

Instructions for mac install were buried bc they changed repos

Future TO-DO

Beth stack for web site

• https://www.youtube.com/watch?v=cpzowDDJj24&t=0s

Turso

https://turso.tech/ Managed SQlLite as libSQL seems promising way to add db to app very quickly with flat file local dev and generous free tier

Add a compilation phase and build steps

• Create output directories
• add git version to output maybe

How to work out belt rank for edges

A competitor that beat gordon at purple shouldn't be considered to beat gordon at black belt

How to work out scheduled jobs

Refresh data daily/weekly/etc

How to figure out ruleset

If a user beats gordon in EBI should that count for ADCC? What about points

[] Cache local files

gocolly/colly#193

Expire local file cache

I need to be able to record when a file was cached locally and then use current date to validate/expire the cache date I think for now once a month or week would really be fine.

[] REad local files

https://github.com/gocolly/colly/blob/master/_examples/local_files/local_files.go

[] Test new file against local file last modified date

Update local cache and rescrape

Resolve urls

Currently they are using weird ?p=# url and want the actual resolved urls

SqlLite

If you need to have sqlite first in your PATH, run: echo 'export PATH="/usr/local/opt/sqlite/bin:$PATH"' >> ~/.zshrc

For compilers to find sqlite you may need to set: export LDFLAGS="-L/usr/local/opt/sqlite/lib" export CPPFLAGS="-I/usr/local/opt/sqlite/include"

For pkg-config to find sqlite you may need to set: export PKG_CONFIG_PATH="/usr/local/opt/sqlite/lib/pkgconfig"

graph db with sqllite

• https://github.com/actyx/ipfs-sqlite-block-store
• https://github.com/dpapathanasiou/simple-graph-go
• Demo Video: https://www.hytradboi.com/2022/simple-graph-sqlite-as-probably-the-only-graph-database-youll-ever-need

Gotchas

Add protocol to scraping domain

must send https://www.bjjheroes.com not just www... weirdly it just failed silently would have expected an error.

Adding local pacakages

must run go mod init after

Best way to organize code

I'd like to just have

/src

• main.go /package1
• package1.go /package2
• package2.go ...

but not sure entirely how to accomplish this. main.go should just setup the code with flags and then call into the src/ packages.

Go community pretty opinionated and have a standard https://github.com/golang-standards/project-layout

Bad url

Sheliah Lindsey Magness BJJ has original url: https://www.bjjheroes.com/?p=13193 which redirects to: https://www.bjjheroes.com/wp-content/uploads/2023/01/CarlosHenrique.jpg

it should be: https://www.bjjheroes.com/bjj-fighters/sheliah-lindsey