Mercurial > libervia-web
annotate libervia/web/pages/chat/_browser/__init__.py @ 1541:3c384b51b2a1
browser (chat): URL previews implementation
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Wed, 28 Jun 2023 10:09:14 +0200 |
| parents | b4342176fa0a |
| children | fb31d3dba0c3 |
| rev | line source |
|---|---|
| 1536 | 1 import json |
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2 import re |
| 1536 | 3 |
| 4 from bridge import AsyncBridge as Bridge | |
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5 from browser import DOMNode, aio, bind, console as log, document, window, html |
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6 from cache import cache, identities |
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7 import dialog |
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8 from file_uploader import FileUploader |
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9 import jid |
| 1536 | 10 from template import Template, safe |
| 11 | |
| 12 log.warning = log.warn | |
| 13 profile = window.profile or "" | |
| 14 own_jid = jid.JID(window.own_jid) | |
| 15 target_jid = jid.JID(window.target_jid) | |
| 16 bridge = Bridge() | |
| 17 | |
| 18 # Sensible value to consider that user is at the bottom | |
| 19 SCROLL_SENSITIVITY = 200 | |
| 20 | |
| 21 | |
| 22 class LiberviaWebChat: | |
| 23 def __init__(self): | |
| 24 self.message_tpl = Template("chat/message.html") | |
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25 self.url_preview_control_tpl = Template("components/url_preview_control.html") |
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26 self.url_preview_tpl = Template("components/url_preview.html") |
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27 |
| 1536 | 28 self.messages_elt = document["messages"] |
| 29 | |
| 30 # attachments | |
| 31 self.file_uploader = FileUploader( | |
| 32 "", "chat/attachment_preview.html", on_delete_cb=self.on_attachment_delete | |
| 33 ) | |
| 34 self.attachments_elt = document["attachments"] | |
| 35 self.message_input = document["message_input"] | |
| 36 | |
| 37 # hide/show attachments | |
| 38 MutationObserver = window.MutationObserver | |
| 39 observer = MutationObserver.new(lambda *__: self.update_attachments_visibility()) | |
| 40 observer.observe(self.attachments_elt, {"childList": True}) | |
| 41 | |
| 42 # we want the message scroll to be initially at the bottom | |
| 43 self.messages_elt.scrollTop = self.messages_elt.scrollHeight | |
| 44 | |
| 45 @property | |
| 46 def is_at_bottom(self): | |
| 47 return ( | |
| 48 self.messages_elt.scrollHeight | |
| 49 - self.messages_elt.scrollTop | |
| 50 - self.messages_elt.clientHeight | |
| 51 <= SCROLL_SENSITIVITY | |
| 52 ) | |
| 53 | |
| 54 def send_message(self): | |
| 55 """Send message currently in input area | |
| 56 | |
| 57 The message and corresponding attachment will be sent | |
| 58 """ | |
| 59 message = self.message_input.value.rstrip() | |
| 60 log.info(f"{message=}") | |
| 61 | |
| 62 # attachments | |
| 63 attachments = [] | |
| 64 for attachment_elt in self.attachments_elt.children: | |
| 65 file_data = json.loads(attachment_elt.getAttribute("data-file")) | |
| 66 attachments.append(file_data) | |
| 67 | |
| 68 if message or attachments: | |
| 69 extra = {} | |
| 70 | |
| 71 if attachments: | |
| 72 extra["attachments"] = attachments | |
| 73 | |
| 74 # now we send the message | |
| 75 try: | |
| 76 aio.run( | |
| 77 bridge.message_send( | |
| 78 str(target_jid), {"": message}, {}, "auto", json.dumps(extra) | |
| 79 ) | |
| 80 ) | |
| 81 except Exception as e: | |
| 82 dialog.notification.show(f"Can't send message: {e}", "error") | |
| 83 else: | |
| 84 self.message_input.value = "" | |
| 85 self.attachments_elt.clear() | |
| 86 | |
| 87 def _on_message_new( | |
| 88 self, | |
| 89 uid: str, | |
| 90 timestamp: float, | |
| 91 from_jid: str, | |
| 92 to_jid: str, | |
| 93 message: dict, | |
| 94 subject: dict, | |
| 95 mess_type: str, | |
| 96 extra_s: str, | |
| 97 profile: str, | |
| 98 ) -> None: | |
| 99 if ( | |
| 100 jid.JID(from_jid).bare == window.target_jid | |
| 101 or jid.JID(to_jid).bare == window.target_jid | |
| 102 ): | |
| 103 aio.run( | |
| 104 self.on_message_new( | |
| 105 uid, | |
| 106 timestamp, | |
| 107 from_jid, | |
| 108 to_jid, | |
| 109 message, | |
| 110 subject, | |
| 111 mess_type, | |
| 112 json.loads(extra_s), | |
| 113 profile, | |
| 114 ) | |
| 115 ) | |
| 116 | |
| 117 async def on_message_new( | |
| 118 self, | |
| 119 uid: str, | |
| 120 timestamp: float, | |
| 121 from_jid: str, | |
| 122 to_jid: str, | |
| 123 message_data: dict, | |
| 124 subject_data: dict, | |
| 125 mess_type: str, | |
| 126 extra: dict, | |
| 127 profile: str, | |
| 128 ) -> None: | |
| 129 log.info(f"on_message_new: [{from_jid} -> {to_jid}] {message_data}, {extra=}") | |
| 130 xhtml_data = extra.get("xhtml") | |
| 131 if not xhtml_data: | |
| 132 xhtml = None | |
| 133 else: | |
| 134 try: | |
| 135 xhtml = xhtml_data[""] | |
| 136 except KeyError: | |
| 137 xhtml = next(iter(xhtml_data.values())) | |
| 138 | |
| 139 await cache.fill_identities([from_jid]) | |
| 140 | |
| 141 msg_data = { | |
| 142 "id": uid, | |
| 143 "timestamp": timestamp, | |
| 144 "type": mess_type, | |
| 145 "from_": from_jid, | |
| 146 "text": message_data.get("") or next(iter(message_data.values()), ""), | |
| 147 "subject": subject_data.get("") or next(iter(subject_data.values()), ""), | |
| 148 "type": mess_type, | |
| 149 "thread": extra.get("thread"), | |
| 150 "thread_parent": extra.get("thread_parent"), | |
| 151 "reeceived": extra.get("received_timestamp") or timestamp, | |
| 152 "delay_sender": extra.get("delay_sender"), | |
| 153 "info_type": extra.get("info_type"), | |
| 154 "html": safe(xhtml) if xhtml else None, | |
| 155 "encrypted": extra.get("encrypted", False), | |
| 156 "received": extra.get("received", False), | |
| 157 "edited": extra.get("edited", False), | |
| 158 "attachments": extra.get("attachments", []), | |
| 159 } | |
| 160 message_elt = self.message_tpl.get_elt( | |
| 161 { | |
| 162 "own_jid": own_jid, | |
| 163 "msg": msg_data, | |
| 164 "identities": identities, | |
| 165 } | |
| 166 ) | |
| 167 | |
| 168 # Check if user is viewing older messages or is at the bottom | |
| 169 is_at_bottom = self.is_at_bottom | |
| 170 | |
| 171 self.messages_elt <= message_elt | |
| 172 self.make_attachments_dynamic(message_elt) | |
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173 # we add preview in parallel on purpose, as they can be slow to get |
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174 self.handle_url_previews(message_elt) |
| 1536 | 175 |
| 176 # If user was at the bottom, keep the scroll at the bottom | |
| 177 if is_at_bottom: | |
| 178 self.messages_elt.scrollTop = self.messages_elt.scrollHeight | |
| 179 | |
| 180 def auto_resize_message_input(self): | |
| 181 """Resize the message input field according to content.""" | |
| 182 | |
| 183 is_at_bottom = self.is_at_bottom | |
| 184 | |
| 185 # The textarea's height is first reset to 'auto' to ensure it's not influenced by | |
| 186 # the previous content. | |
| 187 self.message_input.style.height = "auto" | |
| 188 | |
| 189 # Then the height is set to the scrollHeight of the textarea (which is the height | |
| 190 # of the content), plus the vertical border, resulting in a textarea that grows as | |
| 191 # more lines of text are added. | |
| 192 self.message_input.style.height = f"{self.message_input.scrollHeight + 2}px" | |
| 193 | |
| 194 if is_at_bottom: | |
| 195 # we want the message are to still display the last message | |
| 196 self.messages_elt.scrollTop = self.messages_elt.scrollHeight | |
| 197 | |
| 198 def on_message_keydown(self, evt): | |
| 199 """Handle the 'keydown' event of the message input field | |
| 200 | |
| 201 @param evt: The event object. 'target' refers to the textarea element. | |
| 202 """ | |
| 203 if evt.keyCode == 13: # <Enter> key | |
| 204 if not window.navigator.maxTouchPoints: | |
| 205 # we have a non touch device, we send message on <Enter> | |
| 206 if not evt.shiftKey: | |
| 207 evt.preventDefault() # Prevents line break | |
| 208 self.send_message() | |
| 209 | |
| 210 def update_attachments_visibility(self): | |
| 211 if len(self.attachments_elt.children): | |
| 212 self.attachments_elt.classList.remove("is-contracted") | |
| 213 else: | |
| 214 self.attachments_elt.classList.add("is-contracted") | |
| 215 | |
| 216 def on_file_selected(self, evt): | |
| 217 """Handle file selection""" | |
| 218 log.info("file selected") | |
| 219 files = evt.currentTarget.files | |
| 220 self.file_uploader.upload_files(files, self.attachments_elt) | |
| 221 self.message_input.focus() | |
| 222 | |
| 223 def on_attachment_delete(self, evt): | |
| 224 evt.stopPropagation() | |
| 225 target = evt.currentTarget | |
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226 item_elt = DOMNode(target.closest(".attachment-preview")) |
| 1536 | 227 item_elt.remove() |
| 228 | |
| 229 def on_attach_button_click(self, evt): | |
| 230 document["file_input"].click() | |
| 231 | |
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232 @bind(document["attachments"], "wheel") |
| 1536 | 233 def wheel_event(evt): |
| 234 """Make the mouse wheel to act on horizontal scrolling for attachments | |
| 235 | |
| 236 Attachments don't have vertical scrolling, thus is makes sense to use the wheel | |
| 237 for horizontal scrolling | |
| 238 """ | |
| 239 if evt.deltaY != 0: | |
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240 document["attachments"].scrollLeft += evt.deltaY * 0.8 |
| 1536 | 241 evt.preventDefault() |
| 242 | |
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243 def make_attachments_dynamic(self, parent_elt=None): |
| 1536 | 244 """Make attachments dynamically clickable""" |
| 245 # FIXME: only handle images for now, and display them in a modal | |
| 246 if parent_elt is None: | |
| 247 parent_elt = document | |
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248 img_elts = parent_elt.select(".message-attachment img") |
| 1536 | 249 for img_elt in img_elts: |
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250 img_elt.bind("click", self.open_modal) |
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251 img_elt.style.cursor = "pointer" |
| 1536 | 252 |
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253 close_button = document.select_one(".modal-close") |
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254 close_button.bind("click", self.close_modal) |
| 1536 | 255 |
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256 def find_links(self, message_elt): |
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257 """Find all http and https links within the body of a message.""" |
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258 msg_body_elt = message_elt.select_one(".msg_body") |
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259 if not msg_body_elt: |
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260 return |
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261 |
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262 # Extracting links from text content |
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263 text = msg_body_elt.text |
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264 raw_urls = re.findall( |
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265 r"http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\\(\\),]|(?:%[0-9a-fA-F][0-9a-fA-F])|#)+", |
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266 text, |
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267 ) |
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268 |
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269 # Extracting links from <a> elements |
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270 a_elements = msg_body_elt.select("a") |
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271 for a_elt in a_elements: |
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272 href = a_elt.attrs.get("href", "") |
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273 if href.startswith("http://") or href.startswith("https://"): |
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274 raw_urls.append(href) |
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275 |
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276 # we remove duplicates |
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277 urls = list(dict.fromkeys(raw_urls)) |
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278 |
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279 return urls |
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280 |
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281 async def add_url_previews(self, url_previews_elt, urls) -> None: |
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282 """Add URL previews to the .url-previews element of a message.""" |
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283 url_previews_elt.clear() |
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284 for url in urls: |
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285 try: |
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286 url_preview_data_s = await bridge.url_preview_get(url, "") |
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287 except Exception as e: |
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288 log.warning(f"Couldn't get URL preview for {url}: {e}") |
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289 continue |
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290 |
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291 if not url_preview_data_s: |
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292 log.warning(f"No preview could be found for URL: {url}") |
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293 continue |
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294 |
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295 url_preview_data = json.loads(url_preview_data_s) |
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296 |
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297 url_preview_elt = self.url_preview_tpl.get_elt( |
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298 {"url_preview": url_preview_data} |
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299 ) |
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300 url_previews_elt <= url_preview_elt |
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301 |
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302 |
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303 def handle_url_previews(self, parent_elt=None): |
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304 """Check if URL are presents in a message and show appropriate element |
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305 |
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306 According to settings, either a preview control panel will be shown to wait for |
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307 user click, or directly the previews, or nothing at all. |
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308 """ |
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309 |
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310 if parent_elt is None: |
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311 parent_elt = document |
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312 chat_message_elts = parent_elt.select(".is-chat-message") |
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313 else: |
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314 chat_message_elts = [parent_elt] |
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315 for message_elt in chat_message_elts: |
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316 urls = self.find_links(message_elt) |
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317 if urls: |
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318 url_previews_elt = message_elt.select_one(".url-previews") |
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319 url_previews_elt.classList.remove("is-hidden") |
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320 preview_control_elt = self.url_preview_control_tpl.get_elt() |
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321 fetch_preview_btn = preview_control_elt.select_one(".action_fetch_preview") |
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322 fetch_preview_btn.bind( |
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323 "click", |
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324 lambda __, previews_elt=url_previews_elt, preview_urls=urls: aio.run( |
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325 self.add_url_previews(previews_elt, preview_urls) |
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326 ) |
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327 ) |
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328 url_previews_elt <= preview_control_elt |
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329 |
| 1536 | 330 def open_modal(self, evt): |
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331 modal_image = document.select_one("#modal-image") |
| 1536 | 332 modal_image.src = evt.target.src |
| 333 modal_image.alt = evt.target.alt | |
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334 modal = document.select_one("#modal") |
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335 modal.classList.add("is-active") |
| 1536 | 336 |
| 337 def close_modal(self, evt): | |
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338 modal = document.select_one("#modal") |
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339 modal.classList.remove("is-active") |
| 1536 | 340 |
| 341 | |
| 342 libervia_web_chat = LiberviaWebChat() | |
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343 |
| 1536 | 344 document["message_input"].bind( |
| 345 "input", lambda __: libervia_web_chat.auto_resize_message_input() | |
| 346 ) | |
| 347 document["message_input"].bind("keydown", libervia_web_chat.on_message_keydown) | |
| 348 document["send_button"].bind("click", lambda __: libervia_web_chat.send_message()) | |
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349 document["attach_button"].bind("click", libervia_web_chat.on_attach_button_click) |
| 1536 | 350 document["file_input"].bind("change", libervia_web_chat.on_file_selected) |
| 351 bridge.register_signal("message_new", libervia_web_chat._on_message_new) | |
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352 |
| 1536 | 353 libervia_web_chat.make_attachments_dynamic() |
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354 libervia_web_chat.handle_url_previews() |