8 files changed, 289 insertions, 0 deletions
diff --git a/src/lib/Markdown/CodeBlock.tsx b/src/lib/Markdown/CodeBlock.tsx
new file mode 100644
index 0000000..5b8edec
--- /dev/null
+++ b/src/lib/Markdown/CodeBlock.tsx
@@ -0,0 +1,27 @@
+import React from 'react';
+import { ParserPropTypes } from './types';
+import { Paper } from '@material-ui/core';
+
+import { makeStyles } from '@material-ui/core/styles';
+
+const useStyles = makeStyles(theme => ({
+  root: {
+    background: theme.palette.background.default,
+    padding: theme.spacing(1),
+    overflowX: 'auto',
+    fontFamily: 'Monospace',
+    scrollbarColor: 'auto'
+  },
+}));
+
+const CodeBlock: React.FC<ParserPropTypes> = ({ rawLines }) => {
+  const classes = useStyles();
+  return (
+    <Paper variant="outlined" className={classes.root}>
+      {rawLines.map(line => <pre>{line}</pre>)}
+    </Paper>
+  );
+}
+
+export default CodeBlock;
+
diff --git a/src/lib/Markdown/Content.tsx b/src/lib/Markdown/Content.tsx
new file mode 100644
index 0000000..aaea100
--- /dev/null
+++ b/src/lib/Markdown/Content.tsx
@@ -0,0 +1,77 @@
+import React from 'react';
+
+import CodeBlock from './CodeBlock';
+import Text from './Text';
+import { ParserPropTypes } from './types';
+
+
+const denotesCodeBlock = (line: string): boolean => {
+  return line.match(/^```.*$/) !== null;
+}
+
+const denotesDottedList = (line: string): boolean => {
+  return line.match(/^ ?- .*$/) !== null;
+}
+
+const denotesOpenHtml= (line: string): string => {
+  const regex = /<([^/\s]*)[^<]*[^/]>/g;
+  const match = regex.exec(line);
+  return match ? match[1] : '';
+}
+
+const denotesClosingHtml= (line: string, tag: string): boolean => {
+  const regex = new RegExp(`</${tag}[^<]*>`);
+  return line.match(regex) !== null;
+}
+
+const denotesSelfClosingHtml = (line: string): string[] | null => {
+  const regex = /(<[^/\s]*[^<]*\/>)/g;
+  return line.match(regex);
+}
+
+const Content: React.FC<ParserPropTypes> = ({ rawLines }) => {
+  if (!rawLines.length) return null;
+
+  const line = rawLines.splice(0, 1)[0];
+
+  let buffer;
+  if (denotesCodeBlock(line)) {
+    const closeIndex = rawLines.findIndex(line => denotesCodeBlock(line));
+    const codeBlockLines = rawLines.splice(0, closeIndex + 1).slice(0, closeIndex);
+    buffer = <CodeBlock rawLines={codeBlockLines} />
+  } else if (denotesDottedList(line)) {
+    const closeIndex = rawLines.findIndex(line => !denotesDottedList(line));
+    const dottedListLines = rawLines.splice(0, closeIndex).slice(0, closeIndex);
+    dottedListLines.unshift(line);
+    buffer = <ul>{dottedListLines.map(li => <li><Text line={li.slice(2)} /></li>)}</ul>;
+  } else if ((buffer = denotesOpenHtml(line))) {
+    const tag = buffer;
+    const closeIndex = rawLines.findIndex(line => denotesClosingHtml(line, tag));
+    const htmlLines = rawLines.splice(0, closeIndex + 1).slice(0, closeIndex);
+    htmlLines.unshift(line);
+    buffer = <div dangerouslySetInnerHTML={{ __html: htmlLines.join('\n') }}></div>;
+  } else if ((buffer = denotesSelfClosingHtml(line)) !== null) {
+    const match = buffer[0];
+    const [before, after] = line.split(match);
+    console.log({ line, match, before, after});
+    buffer = (
+      <>
+        <Text line={before} />
+        <div dangerouslySetInnerHTML={{ __html: match }}></div>
+        <Text line={after} />
+      </>
+    );
+  } else {
+    buffer = <p><Text line={line} /></p>
+  }
+
+  return (
+    <>
+      { buffer }
+      <Content rawLines={rawLines} />
+    </>
+  );
+}
+
+export default Content;
+
diff --git a/src/lib/Markdown/Markdown.tsx b/src/lib/Markdown/Markdown.tsx
new file mode 100644
index 0000000..09ad54a
--- /dev/null
+++ b/src/lib/Markdown/Markdown.tsx
@@ -0,0 +1,24 @@
+import React, { useState, useEffect } from 'react';
+import axios from 'axios';
+
+import Section from './Section';
+
+interface PropTypes {
+  data?: string;
+  url?: string;
+}
+
+const Markdown: React.FC<PropTypes> = ({ data, url }) => {
+  const [markdown, setMarkdown] = useState<string>(data || '');
+
+  useEffect(() => {
+    if (!url) setMarkdown(data || '');
+  }, [data, url]);
+
+  if (url) axios.get(url).then(response => setMarkdown(response.data));
+  return <Section rawLines={markdown.split('\n')} />
+};
+
+
+export default Markdown;
+
diff --git a/src/lib/Markdown/Section.tsx b/src/lib/Markdown/Section.tsx
new file mode 100644
index 0000000..5ce8954
--- /dev/null
+++ b/src/lib/Markdown/Section.tsx
@@ -0,0 +1,46 @@
+import React from 'react';
+import ContentSection from '../ContentSection/ContentSection';
+import Content from './Content';
+import { ParserPropTypes } from './types';
+
+interface PropTypes extends ParserPropTypes {
+  level?: number;
+}
+
+const getHeaderLevel = (header: string): number => {
+  if (!header) return 0;
+  let level = 0;
+  while(header[level] === '#') level++;
+  return level;
+}
+
+const ChildrenSections: React.FC<PropTypes> = ({ rawLines, level = 0 }) => {
+  const childrenSectionLines = rawLines.reduce((sections: string[][], line: string) => {
+    if (line) {
+      if (getHeaderLevel(line) === level) sections.push([]);
+      if (sections.length) sections[sections.length - 1].push(line);
+    }
+    return sections;
+  }, []);
+  const children = childrenSectionLines.map(sectionLines => <Section rawLines={sectionLines} level={level}/>);
+  return <> {children} </>;
+}
+
+const Section: React.FC<PropTypes> = ({ rawLines, level = 0 }) => {
+  const deeperLevelIndex = rawLines.findIndex(line => line.match(`^#{${level + 1},} .*$`));
+  const rawContent = rawLines.splice(0, (deeperLevelIndex < 0) ? rawLines.length : deeperLevelIndex);
+
+  if (!level) return <ChildrenSections rawLines={rawLines} level={getHeaderLevel(rawLines[0])}/>;
+
+  const sectionName = rawContent.splice(0, 1)[0].slice(level).trim();
+  const deeperLevel = getHeaderLevel(rawLines[0]);
+  return (
+    <ContentSection sectionName={sectionName} level={level}>
+      <Content rawLines={rawContent} />
+      <ChildrenSections rawLines={rawLines} level={deeperLevel} />
+    </ContentSection>
+  );
+}
+
+export default Section;
+
diff --git a/src/lib/Markdown/SyntacticSpan.tsx b/src/lib/Markdown/SyntacticSpan.tsx
new file mode 100644
index 0000000..299bf87
--- /dev/null
+++ b/src/lib/Markdown/SyntacticSpan.tsx
@@ -0,0 +1,96 @@
+import React from 'react';
+import { Link, makeStyles } from '@material-ui/core';
+
+import { lib as emojiLib } from 'emojilib';
+
+interface PropTypes {
+  span: string;
+}
+
+interface RegexPair {
+  global: RegExp;
+  local: RegExp;
+}
+
+interface Emoji {
+  name: string;
+  char: string;
+}
+
+const enclosureRegex = (e: string): RegexPair => ({
+  local: new RegExp(`${e}([^${e}]+)${e}`),
+  global: new RegExp(`(${e}[^${e}]+${e})`)
+});
+
+const regex: Record<string, RegexPair> = {
+  conceal: {
+    global: /(!?\[.+?\]\(.+?\))/g,
+    local: /!?\[(.+?)\]\((.+?)\)/
+  },
+  rawLink: {
+    global: /((?:(?:[A-Za-z]{3,9}:(?:\/\/)?)(?:[-;:&=+$,\w]+@)?[A-Za-z0-9.-]+|(?:www\.|[-;:&=+$,\w]+@)[A-Za-z0-9.-]+)(?:(?:\/[+~%/.\w-_]*)?\??(?:[-+=&;%@.\w_]*)#?(?:[.!/\\\w]*))?)/,
+    local: /&^/
+  },
+  emoji: enclosureRegex(':'),
+  bold: enclosureRegex('\\*\\*'),
+  italic: enclosureRegex('\\*'),
+  code: enclosureRegex('`'),
+  strikeThrough: enclosureRegex('~~'),
+}
+
+const splitter = new RegExp(Object.values(regex).map(pair => pair.global.source).join('|'));
+
+const emojiList: Emoji[] = [];
+Object.keys(emojiLib).forEach(name => emojiList.push({ name, char: emojiLib[name].char }));
+console.log({emojiList})
+
+const useStyles = makeStyles(theme => ({
+  code: {
+    background: theme.palette.background.default,
+    borderRadius: theme.spacing(.5),
+    padding: theme.spacing(.5),
+    fontFamily: 'Monospace',
+  },
+  image: {
+    maxWidth: '100%',
+    maxHeight: '100%'
+  },
+}));
+
+const SyntacticSpan: React.FC<PropTypes> = ({ span }) => {
+  const classes = useStyles();
+  if (!span) return null;
+
+  const matchConceal = regex.conceal.local.exec(span);
+  if (matchConceal) {
+    if (span[0] === '!') return <img src={matchConceal[2]} alt={matchConceal[1]} className={classes.image} />;
+    return <Link href={matchConceal[2]}>{matchConceal[1]}</Link>;
+  }
+
+  const matchEmoji = span.match(regex.emoji.local);
+  if (matchEmoji) {
+    const emoji = emojiList.find(emoji => emoji.name === matchEmoji[1]);
+    return <span>{emoji ? emoji.char : span}</span>;
+  }
+
+  const matchCode = span.match(regex.code.local);
+  if (matchCode) return <span className={classes.code}>{matchCode[1]}</span>;
+
+  const matchBold = span.match(regex.bold.local);
+  if (matchBold) return <b>{matchBold[1]}</b>;
+
+  const matchItalic = span.match(regex.italic.local);
+  if (matchItalic) return <i>{matchItalic[1]}</i>;
+
+  const matchStrikeThrough = span.match(regex.strikeThrough.local);
+  if (matchStrikeThrough) return <span style={{textDecoration: 'line-through' }}>{matchStrikeThrough[1]}</span>;
+
+  if (span.match(regex.rawLink.global)) return <Link href={span}>{span}</Link>;
+
+  return <>{span}</>;
+}
+
+
+export { splitter };
+export default SyntacticSpan;
+
diff --git a/src/lib/Markdown/Text.tsx b/src/lib/Markdown/Text.tsx
new file mode 100644
index 0000000..e287dee
--- /dev/null
+++ b/src/lib/Markdown/Text.tsx
@@ -0,0 +1,13 @@
+import React from 'react';
+import SyntacticSpan, { splitter } from './SyntacticSpan';
+
+interface PropTypes {
+  line: string;
+}
+
+const Text: React.FC<PropTypes> = ({ line }) => {
+  return <>{line.split(splitter).map(span => <SyntacticSpan span={span} />)}</>;
+}
+
+export default Text;
+
diff --git a/src/lib/Markdown/emojilib.d.ts b/src/lib/Markdown/emojilib.d.ts
new file mode 100644
index 0000000..cddfeea
--- /dev/null
+++ b/src/lib/Markdown/emojilib.d.ts
@@ -0,0 +1,2 @@
+declare module 'emojilib';
+
diff --git a/src/lib/Markdown/types.ts b/src/lib/Markdown/types.ts
new file mode 100644
index 0000000..0b6f4b6
--- /dev/null
+++ b/src/lib/Markdown/types.ts
@@ -0,0 +1,4 @@
+export interface ParserPropTypes {
+  rawLines: string[];
+}
+