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import * as Sequelize from 'sequelize'
import * as Promise from 'bluebird'
import { addMethodsToModel } from '../utils'
import {
TagInstance,
TagAttributes,
TagMethods
} from './tag-interface'
let Tag: Sequelize.Model<TagInstance, TagAttributes>
let findOrCreateTags: TagMethods.FindOrCreateTags
export default function (sequelize: Sequelize.Sequelize, DataTypes: Sequelize.DataTypes) {
Tag = sequelize.define<TagInstance, TagAttributes>('Tag',
{
name: {
type: DataTypes.STRING,
allowNull: false
}
},
{
timestamps: false,
indexes: [
{
fields: [ 'name' ],
unique: true
}
]
}
)
const classMethods = [
associate,
findOrCreateTags
]
addMethodsToModel(Tag, classMethods)
return Tag
}
// ---------------------------------------------------------------------------
function associate (models) {
Tag.belongsToMany(models.Video, {
foreignKey: 'tagId',
through: models.VideoTag,
onDelete: 'CASCADE'
})
}
findOrCreateTags = function (tags: string[], transaction: Sequelize.Transaction) {
const tasks: Promise<TagInstance>[] = []
tags.forEach(tag => {
const query: Sequelize.FindOrInitializeOptions<TagAttributes> = {
where: {
name: tag
},
defaults: {
name: tag
}
}
if (transaction) query.transaction = transaction
const promise = Tag.findOrCreate(query).then(([ tagInstance ]) => tagInstance)
tasks.push(promise)
})
return Promise.all(tasks)
}
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