const em = text => `_${text}_`;
const strong = text => `*${text}*`;
const strike = text => `~${text}~`;
const br = '\n';
const p = text => `\n${text}\n`;
const blockquote = text => `> ${text}`;
const code = text => `\`${text}\``;
const pre = text => `\`\`\`${text}\`\`\``;
const a = ({href}, text) => `<${href}${text ? `|${text}` : ''}>`;
const hr = {type: 'divider'};
const blocks = (...items) => {return {blocks: items};};
const header = (text) => {
  return {
    type: 'header',
    text: plain_text(text),
  };
}
const section = (text, {plain = false} = {}) => {
  return {
    type: 'section',
    text: plain ? plain_text(text) : mrkdwn(text),
  };
};
const context = (...elements) => {
  return {
    type: 'context',
    elements,
  };
};
const mrkdwn = (text, {verbatim = true} = {}) => {
  return {
    type: 'mrkdwn',
    text,
    verbatim,
  };
};
const plain_text = (text, {emoji = true} = {}) => {
  return {
    type: 'plain_text',
    text,
    emoji,
  };
};
const image = (url, alt_text) => {
  return {
    type: 'image',
    url,
    ...(alt_text ? {alt_text} : {}),
  };
};