Add emoji parsing and utils

packages/content/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@welshman/content",
-  "version": "0.2.1",
+  "version": "0.2.2",
   "author": "hodlbod",
   "license": "MIT",
   "description": "A collection of utilities for parsing nostr note content.",

packages/content/src/index.ts

@@ -42,6 +42,7 @@ export enum ParsedType {
   Cashu = "cashu",
   Code = "code",
   Ellipsis = "ellipsis",
+  Emoji = "emoji",
   Event = "event",
   Invoice = "invoice",
   Link = "link",
@@ -70,6 +71,17 @@ export type ParsedEllipsis = {
   raw: string
 }
 
+export type ParsedEmojiValue = {
+  name: string
+  url?: string
+}
+
+export type ParsedEmoji = {
+  type: ParsedType.Emoji
+  value: ParsedEmojiValue
+  raw: string
+}
+
 export type ParsedInvoice = {
   type: ParsedType.Invoice
   value: string
@@ -138,6 +150,7 @@ export type Parsed =
   | ParsedCashu
   | ParsedCode
   | ParsedEllipsis
+  | ParsedEmoji
   | ParsedEvent
   | ParsedInvoice
   | ParsedLink
@@ -155,6 +168,7 @@ export const isCashu = (parsed: Parsed): parsed is ParsedCashu => parsed.type ==
 export const isCode = (parsed: Parsed): parsed is ParsedCode => parsed.type === ParsedType.Code
 export const isEllipsis = (parsed: Parsed): parsed is ParsedEllipsis =>
   parsed.type === ParsedType.Ellipsis
+export const isEmoji = (parsed: Parsed): parsed is ParsedEmoji => parsed.type === ParsedType.Emoji
 export const isEvent = (parsed: Parsed): parsed is ParsedEvent => parsed.type === ParsedType.Event
 export const isInvoice = (parsed: Parsed): parsed is ParsedInvoice =>
   parsed.type === ParsedType.Invoice
@@ -195,18 +209,28 @@ export const parseCashu = (text: string, context: ParseContext): ParsedCashu | v
 }
 
 export const parseCodeBlock = (text: string, context: ParseContext): ParsedCode | void => {
-  const [code, value] = text.match(/^```([^]*?)```/i) || []
+  const [raw, value] = text.match(/^```([^]*?)```/i) || []
 
-  if (code) {
+  if (raw) {
-    return {type: ParsedType.Code, value, raw: code}
+    return {type: ParsedType.Code, value, raw}
   }
 }
 
 export const parseCodeInline = (text: string, context: ParseContext): ParsedCode | void => {
-  const [code, value] = text.match(/^`(.*?)`/i) || []
+  const [raw, value] = text.match(/^`(.*?)`/i) || []
 
-  if (code) {
+  if (raw) {
-    return {type: ParsedType.Code, value, raw: code}
+    return {type: ParsedType.Code, value, raw}
+  }
+}
+
+export const parseEmoji = (text: string, context: ParseContext): ParsedEmoji | void => {
+  const [raw, name] = text.match(/^:(\w+):/i) || []
+
+  if (raw) {
+    const url = context.tags.find(t => t[0] === "emoji" && t[1] === name)?.[2]
+
+    return {type: ParsedType.Emoji, value: {name, url}, raw}
   }
 }
 
@@ -331,6 +355,7 @@ export const parsers = [
   parseCodeInline,
   parseAddress,
   parseProfile,
+  parseEmoji,
   parseEvent,
   parseCashu,
   parseInvoice,
@@ -407,6 +432,8 @@ export const truncate = (
       case ParsedType.Address:
       case ParsedType.Profile:
         return entityLength
+      case ParsedType.Emoji:
+        return parsed.value.name.length
       default:
         return parsed.value.length
     }
@@ -549,6 +576,8 @@ export const renderCode = (p: ParsedCode, r: Renderer) => r.addText(p.value)
 
 export const renderEllipsis = (p: ParsedEllipsis, r: Renderer) => r.addText("…")
 
+export const renderEmoji = (p: ParsedEmoji, r: Renderer) => r.addText(p.raw)
+
 export const renderInvoice = (p: ParsedInvoice, r: Renderer) =>
   r.addLink("lightning:" + p.value, p.value.slice(0, 16) + "…")
 
@@ -584,6 +613,9 @@ export const renderOne = (parsed: Parsed, renderer: Renderer) => {
     case ParsedType.Ellipsis:
       renderEllipsis(parsed as ParsedEllipsis, renderer)
       break
+    case ParsedType.Emoji:
+      renderEmoji(parsed as ParsedEmoji, renderer)
+      break
     case ParsedType.Event:
       renderEvent(parsed as ParsedEvent, renderer)
       break

packages/util/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@welshman/util",
-  "version": "0.2.2",
+  "version": "0.2.3",
   "author": "hodlbod",
   "license": "MIT",
   "description": "A collection of nostr-related utilities.",

packages/util/src/Tags.ts

@@ -1,4 +1,4 @@
-import {uniqBy, mapVals, nth, nthEq, ensurePlural} from "@welshman/lib"
+import {uniqBy, first, spec, mapVals, nth, nthEq, ensurePlural} from "@welshman/lib"
 import {isRelayUrl} from "./Relay.js"
 import {Address} from "./Address.js"
 
@@ -106,6 +106,15 @@ export const getReplyTags = (tags: string[][]) => {
 export const getReplyTagValues = (tags: string[][]) =>
   mapVals(tags => tags.map(nth(1)), getReplyTags(tags))
 
+export const getEmojiTags = (name: string, tags: string[][]) => tags.filter(spec(["emoji", name]))
+
+export const getEmojiTag = (name: string, tags: string[][]) => first(getEmojiTags(name, tags))
+
+export const getEmojiTagUrls = (name: string, tags: string[][]) =>
+  getEmojiTags(name, tags).map(nth(2))
+
+export const getEmojiTagUrl = (name: string, tags: string[][]) => first(getEmojiTagUrls(name, tags))
+
 export const uniqTags = (tags: string[][]) => uniqBy(t => t.slice(0, 2).join(":"), tags)
 
 export const tagsFromIMeta = (imeta: string[]) => imeta.map((m: string) => m.split(" "))