laantungir/nostr-tools
1
0
Fork 0
mirror of https://github.com/nbd-wtf/nostr-tools.git synced 2025-12-09 00:28:51 +00:00
Code Issues Packages Projects Releases Wiki Activity

nip27: parse emoji shortcodes and hashtags too.

Browse Source
This commit is contained in:
fiatjaf
2025-11-20 09:46:41 -03:00
parent e87ffc433c
commit 01880b6fb5
5 changed files with 123 additions and 31 deletions
Download Patch File Download Diff File Expand all files Collapse all files

115
nip27.ts
View File

@@ -1,3 +1,4 @@
import { NostrEvent } from './core.ts'
import { AddressPointer, EventPointer, ProfilePointer, decode } from './nip19.ts'
export type Block =
@@ -29,27 +30,67 @@ export type Block =
type: 'audio'
url: string
}
| {
type: 'emoji'
shortcode: string
url: string
}
| {
type: 'hashtag'
value: string
}
const noCharacter = /\W/m
const noURLCharacter = /\W |\W$|$|,| /m
const MAX_HASHTAG_LENGTH = 42
export function* parse(content: string | NostrEvent): Iterable<Block> {
let emojis: { type: 'emoji'; shortcode: string; url: string }[] = []
if (typeof content !== 'string') {
for (let i = 0; i < content.tags.length; i++) {
const tag = content.tags[i]
if (tag[0] === 'emoji' && tag.length >= 3) {
emojis.push({ type: 'emoji', shortcode: tag[1], url: tag[2] })
}
}
content = content.content
}
export function* parse(content: string): Iterable<Block> {
const max = content.length
let prevIndex = 0
let index = 0
while (index < max) {
let u = content.indexOf(':', index)
if (u === -1) {
mainloop: while (index < max) {
const u = content.indexOf(':', index)
const h = content.indexOf('#', index)
if (u === -1 && h === -1) {
// reached end
break
break mainloop
}
if (content.substring(u - 5, u) === 'nostr') {
const m = content.substring(u + 60).match(noCharacter)
if (u === -1 || (h >= 0 && h < u)) {
// parse hashtag
if (h === 0 || content[h - 1] === ' ') {
const m = content.slice(h + 1, h + MAX_HASHTAG_LENGTH).match(noCharacter)
const end = m ? h + 1 + m.index! : max
yield { type: 'text', text: content.slice(prevIndex, h) }
yield { type: 'hashtag', value: content.slice(h + 1, end) }
index = end
prevIndex = index
continue mainloop
}
// ignore this, it is nothing
index = h + 1
continue mainloop
}
// otherwise parse things that have an ":"
if (content.slice(u - 5, u) === 'nostr') {
const m = content.slice(u + 60).match(noCharacter)
const end = m ? u + 60 + m.index! : max
try {
let pointer: ProfilePointer | AddressPointer | EventPointer
let { data, type } = decode(content.substring(u + 1, end))
let { data, type } = decode(content.slice(u + 1, end))
switch (type) {
case 'npub':
@@ -65,89 +106,107 @@ export function* parse(content: string): Iterable<Block> {
}
if (prevIndex !== u - 5) {
yield { type: 'text', text: content.substring(prevIndex, u - 5) }
yield { type: 'text', text: content.slice(prevIndex, u - 5) }
}
yield { type: 'reference', pointer }
index = end
prevIndex = index
continue
continue mainloop
} catch (_err) {
// ignore this, not a valid nostr uri
index = u + 1
continue
continue mainloop
}
} else if (content.substring(u - 5, u) === 'https' || content.substring(u - 4, u) === 'http') {
const m = content.substring(u + 4).match(noURLCharacter)
} else if (content.slice(u - 5, u) === 'https' || content.slice(u - 4, u) === 'http') {
const m = content.slice(u + 4).match(noURLCharacter)
const end = m ? u + 4 + m.index! : max
const prefixLen = content[u - 1] === 's' ? 5 : 4
try {
let url = new URL(content.substring(u - prefixLen, end))
let url = new URL(content.slice(u - prefixLen, end))
if (url.hostname.indexOf('.') === -1) {
throw new Error('invalid url')
}
if (prevIndex !== u - prefixLen) {
yield { type: 'text', text: content.substring(prevIndex, u - prefixLen) }
yield { type: 'text', text: content.slice(prevIndex, u - prefixLen) }
}
if (/\.(png|jpe?g|gif|webp)$/i.test(url.pathname)) {
yield { type: 'image', url: url.toString() }
index = end
prevIndex = index
continue
continue mainloop
}
if (/\.(mp4|avi|webm|mkv)$/i.test(url.pathname)) {
yield { type: 'video', url: url.toString() }
index = end
prevIndex = index
continue
continue mainloop
}
if (/\.(mp3|aac|ogg|opus)$/i.test(url.pathname)) {
yield { type: 'audio', url: url.toString() }
index = end
prevIndex = index
continue
continue mainloop
}
yield { type: 'url', url: url.toString() }
index = end
prevIndex = index
continue
continue mainloop
} catch (_err) {
// ignore this, not a valid url
index = end + 1
continue
continue mainloop
}
} else if (content.substring(u - 3, u) === 'wss' || content.substring(u - 2, u) === 'ws') {
const m = content.substring(u + 4).match(noURLCharacter)
} else if (content.slice(u - 3, u) === 'wss' || content.slice(u - 2, u) === 'ws') {
const m = content.slice(u + 4).match(noURLCharacter)
const end = m ? u + 4 + m.index! : max
const prefixLen = content[u - 1] === 's' ? 3 : 2
try {
let url = new URL(content.substring(u - prefixLen, end))
let url = new URL(content.slice(u - prefixLen, end))
if (url.hostname.indexOf('.') === -1) {
throw new Error('invalid ws url')
}
if (prevIndex !== u - prefixLen) {
yield { type: 'text', text: content.substring(prevIndex, u - prefixLen) }
yield { type: 'text', text: content.slice(prevIndex, u - prefixLen) }
}
yield { type: 'relay', url: url.toString() }
index = end
prevIndex = index
continue
continue mainloop
} catch (_err) {
// ignore this, not a valid url
index = end + 1
continue
continue mainloop
}
} else {
// try to parse an emoji shortcode
for (let e = 0; e < emojis.length; e++) {
const emoji = emojis[e]
if (
content[u + emoji.shortcode.length + 1] === ':' &&
content.slice(u + 1, u + emoji.shortcode.length + 1) === emoji.shortcode
) {
// found an emoji
if (prevIndex !== u) {
yield { type: 'text', text: content.slice(prevIndex, u) }
}
yield emoji
index = u + emoji.shortcode.length + 2
prevIndex = index
continue mainloop
}
}
// ignore this, it is nothing
index = u + 1
continue
continue mainloop
}
}
if (prevIndex !== max) {
yield { type: 'text', text: content.substring(prevIndex) }
yield { type: 'text', text: content.slice(prevIndex) }
}
}