module main
// This example demonstrates how to use `v watch` for vweb apps, that use sqlite .db files.
//
// Note 1: while developing services, it is useful to also add the `--keep` option of `v watch`,
// which will restart the app right away, even when it exits on its own.
//
// Note 2: vweb supports a special live reload mode, where it will make the browser to check for server
// restarts, and it will trigger a refresh of the current page, right after that is detected.
//
// The above means, that to get the most optimal prototyping experience for vweb apps, use:
// `v -d vweb_livereload watch --only-watch=*.v,*.html,*.css,*.js --keep run .`
import os
import vweb
import db.sqlite
fn mydb() !sqlite.DB {
return sqlite.connect(os.resource_abs_path('app.db'))
}
struct State {
mut:
counter int
}
struct App {
vweb.Context
mut:
state shared State
}
pub fn (mut app App) index() vweb.Result {
mut c := 0
lock app.state {
app.state.counter++
c = app.state.counter
}
visits := app.update_db() or { 0 }
return app.html('
Current request counter, after the server restart: ${c}.
Total stored visits: ${visits}
')
}
fn (mut app App) update_db() !int {
mut db := mydb()!
db.exec('INSERT INTO visits (created_at) VALUES ("")')!
visits := db.q_int('SELECT count(*) FROM visits')!
db.close()!
return visits
}
fn main() {
println('App demonstrating the use of `vweb` & `db.sqlite` together.')
println('For best prototyping experience, run with:')
println('`v -d vweb_livereload watch --keep run examples/vwatch/web_server/`')
println('')
mut db := mydb()!
db.exec('CREATE TABLE visits (id integer primary key AUTOINCREMENT, created_at timestamp default current_timestamp);')!
db.exec('CREATE TRIGGER INSERT_visits AFTER INSERT ON visits BEGIN
UPDATE visits SET created_at = datetime("now", "localtime") WHERE rowid = new.rowid ;
END')!
db.close()!
vweb.run(&App{}, 19123)
}