| 1 | import { type Block, type Span, blocks } from "@g1t/contracts/chat-markdown"; |
| 2 | import { router } from "expo-router"; |
| 3 | import * as WebBrowser from "expo-web-browser"; |
| 4 | import { Fragment, createContext, useContext, useMemo } from "react"; |
| 5 | import { ScrollView, StyleSheet, Text, View } from "react-native"; |
| 6 | |
| 7 | import { type RefContext, refContext, refRoute, routeFor } from "@/lib/links"; |
| 8 | import { siteUrl } from "@/lib/server"; |
| 9 | import { useSignedIn } from "@/lib/session"; |
| 10 | import { fonts, radius, space, useColors } from "@/theme"; |
| 11 | |
| 12 | /** |
| 13 | * A message's Markdown, as the site draws it (components/chat/text.tsx), |
| 14 | * from the same parser (@g1t/contracts/chat-markdown): nothing in a |
| 15 | * message is HTML, links go only to the web, mail or a page on g1t, and |
| 16 | * `@mentions`, `#channels` and `#123` references stand out. A link to a |
| 17 | * page the app has opens there; any other opens in the browser. |
| 18 | * |
| 19 | * `#123` is read in `refs`, where the text was written: a repository for a |
| 20 | * pull request's, the workspace for Chat's and a work item's. g1t says |
| 21 | * what it names when it is tapped (app/ref.tsx). |
| 22 | */ |
| 23 | export function Markdown({ text, muted, refs }: { text: string; muted?: boolean; refs?: RefContext }) { |
| 24 | const parsed = useMemo(() => blocks(text), [text]); |
| 25 | const body = ( |
| 26 | <View style={{ gap: space.xs }}> |
| 27 | {parsed.map((block, index) => ( |
| 28 | <BlockView key={index} block={block} muted={muted} /> |
| 29 | ))} |
| 30 | </View> |
| 31 | ); |
| 32 | return refs ? <RefsHere.Provider value={refs}>{body}</RefsHere.Provider> : body; |
| 33 | } |
| 34 | |
| 35 | /** Where `#123` in the text being drawn is read; the workspace you are in when nothing says. */ |
| 36 | const RefsHere = createContext<RefContext | null>(null); |
| 37 | |
| 38 | function useOpen() { |
| 39 | const { server, workspace } = useSignedIn(); |
| 40 | return (href: string) => { |
| 41 | const path = href.startsWith(server.site) ? href.slice(server.site.length) || "/" : href.startsWith("/") ? href : null; |
| 42 | const route = path ? routeFor(path) : null; |
| 43 | if (route) return router.push(route as never); |
| 44 | void WebBrowser.openBrowserAsync(path ? siteUrl(server, path) : href); |
| 45 | void workspace; |
| 46 | }; |
| 47 | } |
| 48 | |
| 49 | function BlockView({ block, muted }: { block: Block; muted?: boolean }) { |
| 50 | const colors = useColors(); |
| 51 | const base = { color: muted ? colors.muted : colors.fg, fontSize: 15, lineHeight: 21 }; |
| 52 | switch (block.t) { |
| 53 | case "p": |
| 54 | return ( |
| 55 | <Text style={base} selectable> |
| 56 | {block.lines.map((line, index) => ( |
| 57 | <Fragment key={index}> |
| 58 | {index > 0 ? "\n" : null} |
| 59 | <Spans spans={line} /> |
| 60 | </Fragment> |
| 61 | ))} |
| 62 | </Text> |
| 63 | ); |
| 64 | case "heading": |
| 65 | return ( |
| 66 | <Text style={[base, { fontWeight: "700", fontSize: block.level <= 2 ? 17 : 15 }]}> |
| 67 | <Spans spans={block.c} /> |
| 68 | </Text> |
| 69 | ); |
| 70 | case "code": |
| 71 | return ( |
| 72 | <ScrollView horizontal style={[styles.codeBlock, { backgroundColor: colors.raised, borderColor: colors.line }]}> |
| 73 | <Text selectable style={{ fontFamily: fonts.mono, fontSize: 13, lineHeight: 19, color: colors.fgSoft }}> |
| 74 | {block.v} |
| 75 | </Text> |
| 76 | </ScrollView> |
| 77 | ); |
| 78 | case "list": |
| 79 | return ( |
| 80 | <View style={{ gap: 2 }}> |
| 81 | {block.items.map((item, index) => ( |
| 82 | <View key={index} style={{ flexDirection: "row", gap: space.sm }}> |
| 83 | <Text style={[base, { color: colors.muted, minWidth: 16 }]}>{block.ordered ? `${block.start + index}.` : "•"}</Text> |
| 84 | <View style={{ flex: 1, gap: 2 }}> |
| 85 | {item.map((inner, at) => ( |
| 86 | <BlockView key={at} block={inner} muted={muted} /> |
| 87 | ))} |
| 88 | </View> |
| 89 | </View> |
| 90 | ))} |
| 91 | </View> |
| 92 | ); |
| 93 | case "quote": |
| 94 | return ( |
| 95 | <View style={[styles.quote, { borderLeftColor: colors.lineStrong }]}> |
| 96 | {block.c.map((inner, index) => ( |
| 97 | <BlockView key={index} block={inner} muted /> |
| 98 | ))} |
| 99 | </View> |
| 100 | ); |
| 101 | case "hr": |
| 102 | return <View style={{ height: StyleSheet.hairlineWidth, backgroundColor: colors.lineStrong, marginVertical: space.xs }} />; |
| 103 | case "table": |
| 104 | return ( |
| 105 | <ScrollView horizontal> |
| 106 | <View style={[styles.table, { borderColor: colors.line }]}> |
| 107 | {[block.head, ...block.rows].map((row, rowIndex) => ( |
| 108 | <View key={rowIndex} style={{ flexDirection: "row", backgroundColor: rowIndex === 0 ? colors.raised : "transparent" }}> |
| 109 | {row.map((cell, cellIndex) => ( |
| 110 | <Text |
| 111 | key={cellIndex} |
| 112 | style={[base, styles.cell, { borderColor: colors.line, fontWeight: rowIndex === 0 ? "600" : "400", textAlign: block.align[cellIndex] ?? "left" }]} |
| 113 | > |
| 114 | <Spans spans={cell} /> |
| 115 | </Text> |
| 116 | ))} |
| 117 | </View> |
| 118 | ))} |
| 119 | </View> |
| 120 | </ScrollView> |
| 121 | ); |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | function Spans({ spans }: { spans: Span[] }) { |
| 126 | const colors = useColors(); |
| 127 | const open = useOpen(); |
| 128 | const { workspace } = useSignedIn(); |
| 129 | const given = useContext(RefsHere); |
| 130 | const here = given ?? (workspace ? { workspace: workspace.slug } : null); |
| 131 | return ( |
| 132 | <> |
| 133 | {spans.map((span, index) => { |
| 134 | switch (span.t) { |
| 135 | case "text": |
| 136 | return <Fragment key={index}>{span.v}</Fragment>; |
| 137 | case "code": |
| 138 | return ( |
| 139 | <Text key={index} style={{ fontFamily: fonts.mono, fontSize: 13, backgroundColor: colors.raised, color: colors.fgSoft }}> |
| 140 | {` ${span.v} `} |
| 141 | </Text> |
| 142 | ); |
| 143 | case "strong": |
| 144 | return ( |
| 145 | <Text key={index} style={{ fontWeight: "700" }}> |
| 146 | <Spans spans={span.c} /> |
| 147 | </Text> |
| 148 | ); |
| 149 | case "em": |
| 150 | return ( |
| 151 | <Text key={index} style={{ fontStyle: "italic" }}> |
| 152 | <Spans spans={span.c} /> |
| 153 | </Text> |
| 154 | ); |
| 155 | case "del": |
| 156 | return ( |
| 157 | <Text key={index} style={{ textDecorationLine: "line-through" }}> |
| 158 | <Spans spans={span.c} /> |
| 159 | </Text> |
| 160 | ); |
| 161 | case "link": |
| 162 | return ( |
| 163 | <Text key={index} style={{ color: colors.accent, textDecorationLine: "underline" }} onPress={() => open(span.href)}> |
| 164 | <Spans spans={span.c} /> |
| 165 | </Text> |
| 166 | ); |
| 167 | case "mention": |
| 168 | return ( |
| 169 | <Text key={index} style={{ color: colors.accent, backgroundColor: colors.accentLow, fontWeight: "600" }}> |
| 170 | @{span.name} |
| 171 | </Text> |
| 172 | ); |
| 173 | case "channel": |
| 174 | return ( |
| 175 | <Text key={index} style={{ color: colors.accent, fontWeight: "600" }} onPress={() => workspace && open(`/${workspace.slug}/-/chat/${span.name}`)}> |
| 176 | #{span.name} |
| 177 | </Text> |
| 178 | ); |
| 179 | case "ref": |
| 180 | return ( |
| 181 | <Text key={index} style={{ color: colors.accent }} onPress={() => here && router.push(refRoute(refContext(span.repo, here), span.number) as never)}> |
| 182 | {span.repo ? `${span.repo}#${span.number}` : `#${span.number}`} |
| 183 | </Text> |
| 184 | ); |
| 185 | } |
| 186 | })} |
| 187 | </> |
| 188 | ); |
| 189 | } |
| 190 | |
| 191 | const styles = StyleSheet.create({ |
| 192 | codeBlock: { borderWidth: 1, borderRadius: radius.sm, padding: space.sm }, |
| 193 | quote: { borderLeftWidth: 3, paddingLeft: space.sm, gap: space.xs }, |
| 194 | table: { borderWidth: 1, borderRadius: radius.sm }, |
| 195 | cell: { paddingHorizontal: space.sm, paddingVertical: 4, minWidth: 80, borderRightWidth: StyleSheet.hairlineWidth, borderBottomWidth: StyleSheet.hairlineWidth }, |
| 196 | }); |