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const Loader = require('../vendor/Loader')
const db_crud = require('./crud')
module.exports = function modelScope(type, db_model, _props) {
const props = Object.assign({
hasOne: {},
afterCreate: () => {},
}, _props)
const crud = db_crud(db_model)
const model = {
type: type,
db_model: db_model,
crud: crud,
index: (query) => {
return new Promise( (resolve, reject) => {
crud.index(query).then( (data) => {
if (! props.hasOne) {
resolve(data ? data.toJSON() : [])
}
else {
let recs = data.toJSON()
const loader = new Loader ()
loader.onReady( () => {
// console.log(type, 'ready')
resolve(recs)
})
// console.log('hasOne')
loader.register('hasOne')
Object.keys(props.hasOne).forEach( (key,i) => {
loader.register(key)
// console.log('register', key)
const type = props.hasOne[key]
const id_lookup = {}
recs.forEach(r => {
const id = r[key + '_id']
id_lookup[id] = id_lookup[id] || []
id_lookup[id].push(r)
})
// console.log('\n\n%%%%%%%%%%%%%%%%%%%%%%%% index > hasOne ' + key + '\n\n\n')
// console.log(recs.length, Object.keys(id_lookup).length)
db_crud(type).show_ids(Object.keys(id_lookup)).then( (sub_recs) => {
// console.log(key, 'sub_recs', sub_recs)
const short_key = key.replace('_id','')
sub_recs.toJSON().forEach(rec => {
id_lookup[rec.id].forEach( parent_rec => parent_rec[short_key] = rec )
})
// console.log('ready', key)
loader.ready(key)
})
})
loader.ready('hasOne')
}
}) // }).catch( () => res.sendStatus(500) )
})
},
show: (id) => {
return new Promise( (resolve, reject) => {
crud.show(id).then( (data) => {
if (! props.hasOne) {
resolve(data.toJSON())
}
else {
let rec = data.toJSON()
const loader = new Loader ()
loader.onReady( () => {
resolve(rec)
})
loader.register('hasOne')
Object.keys(props.hasOne).forEach( (key,i) => {
loader.register(key)
const type = props.hasOne[key]
db_crud(type).show(rec[key + '_id']).then( (sub_rec) => {
rec[key] = sub_rec
loader.ready(key)
})
})
loader.ready('hasOne')
}
}) // .catch( (err) => res.sendStatus(500) )
})
},
findOrCreate: (data) => {
return new Promise( (resolve, reject) => {
let query = Object.assign({}, data)
query.limit = 1
crud.index(query).then( (recs) => {
if (recs && recs.length) {
const rec = recs.at(0)
// console.log('found rec', data.name)
return resolve(rec)
}
// console.log('creating rec', data.name)
model.create(data).then( (rec) => {
resolve(rec)
})
})
})
},
create: (data) => {
return new Promise( (resolve, reject) => {
crud.create( model.sanitize(data) ).then( (data) => {
resolve(data.toJSON())
props.afterCreate && props.afterCreate(data)
}).catch( (e) => {
console.error('error creating', e)
reject()
})
})
},
update: (id, data) => {
// console.log('update', id)
return new Promise( (resolve, reject) => {
crud.update(id, model.sanitize(data)).then( (data) => {
resolve(data.toJSON())
}).catch( (e) => {
console.error('error updating', e)
reject()
})
})
},
destroy: (id) => {
return new Promise( (resolve, reject) => {
crud.destroy(id).then( (data) => {
resolve(data.toJSON())
})// .catch( () => res.sendStatus(500) )
})
},
sanitize: (data) => {
var valid = {}
props.fields.forEach(key => {
if (props.hasOne[key]) {
return
}
if (key in data) {
valid[key] = data[key]
}
})
// console.log(valid)
return valid
},
}
return model
}
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