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add ability to insert mermaid diagram into text notes as image

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zadam
2023-10-21 00:23:16 +02:00
parent 9d918e7a54
commit b39ba76505
9 changed files with 115 additions and 94 deletions
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49
src/routes/api/image.js
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@@ -25,33 +25,14 @@ function returnImageInt(image, res) {
if (!image) {
res.set('Content-Type', 'image/png');
return res.send(fs.readFileSync(`${RESOURCE_DIR}/db/image-deleted.png`));
} else if (!["image", "canvas"].includes(image.type)) {
} else if (!["image", "canvas", "mermaid"].includes(image.type)) {
return res.sendStatus(400);
}
/**
* special "image" type. the canvas is actually type application/json
* to avoid bitrot and enable usage as referenced image the svg is included.
*/
if (image.type === 'canvas') {
let svgString = '<svg/>'
const attachment = image.getAttachmentByTitle('canvas-export.svg');
if (attachment) {
svgString = attachment.getContent();
} else {
// backwards compatibility, before attachments, the SVG was stored in the main note content as a separate key
const contentSvg = image.getJsonContentSafely()?.svg;
if (contentSvg) {
svgString = contentSvg;
}
}
const svg = svgString
res.set('Content-Type', "image/svg+xml");
res.set("Cache-Control", "no-cache, no-store, must-revalidate");
res.send(svg);
renderSvgAttachment(image, res, 'canvas-export.svg');
} else if (image.type === 'mermaid') {
renderSvgAttachment(image, res, 'mermaid-export.svg');
} else {
res.set('Content-Type', image.mime);
res.set("Cache-Control", "no-cache, no-store, must-revalidate");
@@ -59,6 +40,28 @@ function returnImageInt(image, res) {
}
}
function renderSvgAttachment(image, res, attachmentName) {
let svgString = '<svg/>'
const attachment = image.getAttachmentByTitle(attachmentName);
if (attachment) {
svgString = attachment.getContent();
} else {
// backwards compatibility, before attachments, the SVG was stored in the main note content as a separate key
const contentSvg = image.getJsonContentSafely()?.svg;
if (contentSvg) {
svgString = contentSvg;
}
}
const svg = svgString
res.set('Content-Type', "image/svg+xml");
res.set("Cache-Control", "no-cache, no-store, must-revalidate");
res.send(svg);
}
function returnAttachedImage(req, res) {
const attachment = becca.getAttachment(req.params.attachmentId);