| 1 | import { type PlateSlide } from "@/components/notebook/presentation/utils/parser"; |
| 2 | |
| 3 | function isRecord(value: unknown): value is Record<string, unknown> { |
| 4 | return typeof value === "object" && value !== null; |
| 5 | } |
| 6 | |
| 7 | function getValidUrl(value: unknown): string | null { |
| 8 | if (typeof value !== "string") { |
| 9 | return null; |
| 10 | } |
| 11 | |
| 12 | const trimmedValue = value.trim(); |
| 13 | |
| 14 | return trimmedValue.length > 0 ? trimmedValue : null; |
| 15 | } |
| 16 | |
| 17 | function getRootImageThumbnailUrl(slide: PlateSlide): string | null { |
| 18 | if (slide.rootImage?.embedType && slide.rootImage.embedType !== "image") { |
| 19 | return null; |
| 20 | } |
| 21 | |
| 22 | return getValidUrl(slide.rootImage?.url); |
| 23 | } |
| 24 | |
| 25 | function findFirstInlineImageUrl(nodes: unknown[]): string | null { |
| 26 | for (const node of nodes) { |
| 27 | if (!isRecord(node)) { |
| 28 | continue; |
| 29 | } |
| 30 | |
| 31 | if (node.type === "img") { |
| 32 | const imageUrl = getValidUrl(node.url); |
| 33 | |
| 34 | if (imageUrl) { |
| 35 | return imageUrl; |
| 36 | } |
| 37 | } |
| 38 | |
| 39 | const children = node.children; |
| 40 | |
| 41 | if (Array.isArray(children)) { |
| 42 | const childImageUrl = findFirstInlineImageUrl(children); |
| 43 | |
| 44 | if (childImageUrl) { |
| 45 | return childImageUrl; |
| 46 | } |
| 47 | } |
| 48 | } |
| 49 | |
| 50 | return null; |
| 51 | } |
| 52 | |
| 53 | export function getPresentationThumbnailUrl( |
| 54 | slides: readonly PlateSlide[], |
| 55 | ): string | null { |
| 56 | for (const slide of slides) { |
| 57 | const rootImageUrl = getRootImageThumbnailUrl(slide); |
| 58 | |
| 59 | if (rootImageUrl) { |
| 60 | return rootImageUrl; |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | for (const slide of slides) { |
| 65 | const inlineImageUrl = findFirstInlineImageUrl(slide.content); |
| 66 | |
| 67 | if (inlineImageUrl) { |
| 68 | return inlineImageUrl; |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | return null; |
| 73 | } |
| 74 | |
| 75 | export function getPresentationSlidesFromContent( |
| 76 | content: unknown, |
| 77 | ): PlateSlide[] { |
| 78 | if (!isRecord(content)) { |
| 79 | return []; |
| 80 | } |
| 81 | |
| 82 | const slides = content.slides; |
| 83 | |
| 84 | if (!Array.isArray(slides)) { |
| 85 | return []; |
| 86 | } |
| 87 | |
| 88 | return slides.filter( |
| 89 | (slide): slide is PlateSlide => |
| 90 | isRecord(slide) && |
| 91 | typeof slide.id === "string" && |
| 92 | Array.isArray(slide.content), |
| 93 | ); |
| 94 | } |
| 95 |