feat: PlantUML markdown module (#1066)

package.json

@@ -100,6 +100,7 @@
     "markdown-it-imsize": "2.0.1",
     "markdown-it-mark": "3.0.0",
     "markdown-it-mathjax": "2.0.0",
+    "markdown-it-plantuml": "1.4.1",
     "markdown-it-sub": "1.0.0",
     "markdown-it-sup": "1.0.0",
     "markdown-it-task-lists": "2.1.1",

server/modules/rendering/markdown-plantuml/definition.yml

+key: markdownPlantuml
+title: PlantUML
+description: PlantUML Markdown Parser
+author: ethanmdavidson
+icon: mdi-sitemap
+enabledDefault: true
+dependsOn: markdownCore
+props:
+  server:
+    type: String
+    default: http://www.plantuml.com/plantuml
+    title: PlantUML Server
+    hint: PlantUML server used for image generation
+    order: 1
+  openMarker:
+    type: String
+    default: "@startuml"
+    title: Open Marker
+    hint: String to use as opening delimiter
+    order: 2
+  closeMarker:
+    type: String
+    default: "@enduml"
+    title: Close Marker
+    hint: String to use as closing delimiter
+    order: 3
+  imageFormat:
+    type: String
+    default: svg
+    title: Image Format
+    hint: Format to use for rendered PlantUML images
+    enum:
+      - svg
+      - png
+      - latex
+      - ascii
+    order: 4

server/modules/rendering/markdown-plantuml/renderer.js

+const mdPlantUml = require('markdown-it-plantuml')
+
+// ------------------------------------
+// Markdown - PlantUML Preprocessor
+// ------------------------------------
+
+module.exports = {
+  init (md, conf) {
+    md.use(mdPlantUml, {
+      openMarker: conf.openMarker,
+      closeMarker: conf.closeMarker,
+      imageFormat: conf.imageFormat,
+      server: conf.server
+    })
+  }
+}