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import { Injectable } from '@angular/core'
import { getAbsoluteAPIUrl } from '@app/helpers/utils'
import * as LinkifyJS from 'linkifyjs'
@Injectable()
export class LinkifierService {
static CLASSNAME = 'linkified'
private linkifyModule: typeof LinkifyJS
private linkifyHtmlModule: any
private mentionPluginInitialized = false
private linkifyOptions = {
className: {
mention: LinkifierService.CLASSNAME + '-mention',
url: LinkifierService.CLASSNAME + '-url'
},
formatHref: {
mention: (href: string) => {
return getAbsoluteAPIUrl() + '/services/redirect/accounts/' + href.substring(1)
}
}
}
async linkify (text: string) {
if (!this.linkifyModule) {
const result = await Promise.all([
import('linkifyjs'),
import('linkify-html').then(m => (m as any).default)
])
this.linkifyModule = result[0]
this.linkifyHtmlModule = result[1]
this.buildMentionPlugin()
}
return this.linkifyHtmlModule(text, this.linkifyOptions)
}
private buildMentionPlugin () {
if (this.mentionPluginInitialized) return
const MentionToken = this.linkifyModule.createTokenClass('mention', {
isLink: true,
toHref () {
return '/' + this.toString().slice(1)
}
})
this.linkifyModule.registerPlugin('mention', ({ scanner, parser }) => {
const { DOT, HYPHEN, UNDERSCORE, AT } = scanner.tokens
const { domain } = scanner.tokens.groups
// Start with @
const At = parser.start.tt(AT)
// Valid mention (not made up entirely of symbols)
const Mention = At.tt(UNDERSCORE, MentionToken as any)
At.ta(domain, Mention)
At.tt(UNDERSCORE, Mention)
// More valid mentions
Mention.ta(domain, Mention)
Mention.tt(HYPHEN, Mention)
Mention.tt(UNDERSCORE, Mention)
// ADDED: . transitions
const MentionDot = Mention.tt(DOT)
MentionDot.ta(domain, Mention)
MentionDot.tt(HYPHEN, Mention)
MentionDot.tt(UNDERSCORE, Mention)
const MentionAt = Mention.tt(AT)
MentionAt.ta(domain, Mention)
MentionAt.tt(HYPHEN, Mention)
MentionAt.tt(UNDERSCORE, Mention)
})
this.mentionPluginInitialized = true
}
}
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