90 lines
4.3 KiB
TypeScript
90 lines
4.3 KiB
TypeScript
import type { AdfDocument, AdfNode } from '../../adf/document.ts'
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import type { Block, ClaimedConstruct } from './blocks.ts'
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import type { LinkDefinitions } from './inline-content.ts'
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import { failure, success, type ConvertErrorPath, type Result } from '../../result.ts'
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import { largestNesting } from '../../nesting.ts'
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import { parseBlocks } from './blocks.ts'
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import { parseInlineContent } from './inline-content.ts'
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export function markdownToAdf(markdown: string): Result<AdfDocument> {
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const parsed = parseBlocks(markdown)
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const content = blockNodes(parsed.blocks, parsed.definitions, [], 0)
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if (!content.ok) return content
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return success(content.value.length === 0 ? { type: 'doc', version: 1 } : { content: content.value, type: 'doc', version: 1 })
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}
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function blockNodes(blocks: readonly Block[], definitions: LinkDefinitions, path: ConvertErrorPath, depth: number): Result<AdfNode[]> {
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if (depth > largestNesting) return failure('unsupported-nesting-depth', `the input nests deeper than the ${largestNesting} levels the parser carries`, path)
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const content: AdfNode[] = []
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for (const [index, block] of blocks.entries()) {
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const node = blockNode(block, definitions, [...path, 'content', index], depth)
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if (!node.ok) return node
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content.push(node.value)
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}
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return success(content)
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}
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function blockNode(block: Block, definitions: LinkDefinitions, path: ConvertErrorPath, depth: number): Result<AdfNode> {
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switch (block.kind) {
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case 'blockquote':
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return containerNode({ type: 'blockquote' }, block.blocks, definitions, path, depth)
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case 'bulletList':
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return listNode({ type: 'bulletList' }, block.items, definitions, path, depth)
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case 'claim':
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return claimFailure(block.construct, path)
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case 'code':
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return success(codeBlockNode(block.language, block.text))
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case 'heading':
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return contentNode({ attrs: { level: block.level }, type: 'heading' }, block.text, definitions, path)
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case 'html':
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return failure('unmappable-html', `no ADF node carries ${block.construct}`, path)
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case 'orderedList':
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return listNode({ attrs: { order: block.start }, type: 'orderedList' }, block.items, definitions, path, depth)
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case 'paragraph':
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return contentNode({ type: 'paragraph' }, block.text, definitions, path)
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case 'rule':
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return success({ type: 'rule' })
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}
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}
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function containerNode(node: AdfNode, blocks: readonly Block[], definitions: LinkDefinitions, path: ConvertErrorPath, depth: number): Result<AdfNode> {
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const content = blockNodes(blocks, definitions, path, depth + 1)
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if (!content.ok) return content
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return success(content.value.length === 0 ? node : { ...node, content: content.value })
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}
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function listNode(node: AdfNode, items: readonly Block[][], definitions: LinkDefinitions, path: ConvertErrorPath, depth: number): Result<AdfNode> {
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const content: AdfNode[] = []
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for (const [index, blocks] of items.entries()) {
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const item = containerNode({ type: 'listItem' }, blocks, definitions, [...path, 'content', index], depth)
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if (!item.ok) return item
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content.push(item.value)
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}
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return success({ ...node, content })
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}
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function claimFailure(construct: ClaimedConstruct, path: ConvertErrorPath): Result<AdfNode> {
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switch (construct) {
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case 'directive':
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return failure('malformed-directive', 'the line claims a directive and parses as none', path)
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case 'pipe-table':
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return failure('malformed-pipe-table', 'the line claims a pipe table and parses as none', path)
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}
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}
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function codeBlockNode(language: string, text: string): AdfNode {
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const node: AdfNode = language === '' ? { type: 'codeBlock' } : { attrs: { language }, type: 'codeBlock' }
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return text === '' ? node : { ...node, content: [{ text, type: 'text' }] }
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}
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// spec/flavour.md, The CommonMark image: only a paragraph gives an image the block it needs.
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function contentNode(node: AdfNode, text: string, definitions: LinkDefinitions, path: ConvertErrorPath): Result<AdfNode> {
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const content = parseInlineContent(text, definitions, path)
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if (!content.ok) return content
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const image = content.value.image
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if (image !== undefined) {
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return node.type === 'paragraph' ? success(image) : failure('unmappable-image', `no ADF node carries an image inside a ${node.type}`, path)
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}
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return success(content.value.nodes.length === 0 ? node : { ...node, content: content.value.nodes })
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}
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