Added very rough rocrate-metadata.json loader

.gitignore

@@ -1,5 +1,4 @@
 .DS_Store
-dist/
 docs/.observablehq/cache/
 node_modules/
 yarn-error.log

docs/components/crate.js

@@ -2,6 +2,17 @@ import {html} from "npm:htl";
 
 import * as d3 from "npm:d3";
 
+export function nil_crate() {
+	return {
+		nodes: [],
+		links: [],
+		types: [],
+		relations: [],
+		externals: [],
+
+	}
+}
+
 export function root_entity(entities) {
 	const root_id = entities['ro-crate-metadata.json']['links_from']['about'][0];
 	return entities[root_id];

docs/upload.md

@@ -0,0 +1,83 @@
+---
+title: RO-Crate Upload
+toc: false
+---
+```js
+
+import { load_crate } from "./components/loader.js";
+import { nil_crate, root_entity, make_colour_map  } from "./components/crate.js";
+import { forcegraph } from "./components/forcegraph.js";
+
+
+```
+## RO-Crate
+
+Upload an rocrate-metadata.json file (note that this is very experimental
+and the uploaded ro-crate won't be passed through to the other pages)
+
+```js
+
+const cratefile = view(Inputs.file({label: "ro-crate JSON", accept: ".json", required: true}));
+
+```
+
+```js
+
+const cratejson = cratefile.json();
+```
+
+
+
+```js
+
+
+const crate = load_crate(cratejson);
+
+const root = root_entity(crate.nodes);
+const nodes = Object.keys(crate.nodes).map((eid) => crate.nodes[eid]);
+
+
+const colours = make_colour_map(crate.types);
+
+```
+
+```js
+const use_types = view(Inputs.checkbox(crate.types, { 
+  multiple: true, 
+  label: "Entity types",
+  value: crate.types,
+}));
+```
+
+```js
+const use_rels = view(Inputs.checkbox(crate.relations, {
+  multiple: true,
+  label: "Relationships",
+  value: crate.relations,
+}));
+```
+
+```js
+const use_externals = view(Inputs.checkbox(crate.externals, {
+  multiple: true,
+  label: "External ID domains",
+}));
+```
+
+
+```js
+const show_nodes = nodes.filter((n) => use_types.includes(n.type[0]));
+const show_ids = show_nodes.map((n) => n.id);
+const show_links = crate.links.filter(
+  (l) => {
+    if( !use_rels.includes(l.property) ) {
+      return false;
+    }
+    return show_ids.includes(l.source) && show_ids.includes(l.target);
+  });
+
+const svg = forcegraph({nodes: show_nodes, links: show_links}, colours);
+
+display(svg.node());
+
+```

observablehq.config.ts

@@ -5,6 +5,7 @@ export default {
   pages: [
     {name: "Statistics", path: "/statistics.html"},
     {name: "Graph", path: "/force-graph.html"},
+    {name: "Upload", path: "/upload.html"},
     {name: "About", path: "/about.html"},
   ],
 };