| |
| import truncate from 'shared/truncate'; |
| import type { RawContentState } from 'draft-js'; |
|
|
| const nthIndexOf = (string, pattern, n) => { |
| var i = -1; |
|
|
| while (n-- && i++ < string.length) { |
| i = string.indexOf(pattern, i); |
| if (i < 0) break; |
| } |
|
|
| return i; |
| }; |
|
|
| export default (state: RawContentState): string => { |
| const textBlocks = state.blocks.filter( |
| ({ type }) => |
| type === 'unstyled' || |
| type.indexOf('header') === 0 || |
| type.indexOf('list') > -1 |
| ); |
| const text = textBlocks |
| .map((block, index) => { |
| switch (block.type) { |
| case 'unordered-list-item': |
| return `• ${block.text}`; |
| case 'ordered-list-item': { |
| const number = textBlocks.reduce((number, b, i) => { |
| if (i >= index) return number; |
| if (b.type !== 'ordered-list-item') return number; |
| return number + 1; |
| }, 1); |
| return `${number}. ${block.text}`; |
| } |
| default: |
| return block.text; |
| } |
| }) |
| .join('\n') |
| |
| .replace(/[\r\n]+/g, '\n'); |
| const indexOfThirdLineBreak = nthIndexOf(text, '\n', 3); |
| const cut = text.substr( |
| 0, |
| indexOfThirdLineBreak > -1 ? indexOfThirdLineBreak : text.length |
| ); |
| return truncate(cut !== text ? `${cut} …` : cut, 280); |
| }; |
|
|
