From b3743e1f9df815704fa21235449891090c3a6e58 Mon Sep 17 00:00:00 2001
From: milovann <mil01@free.fr>
Date: Wed, 27 Mar 2024 17:55:56 +0100
Subject: [PATCH] [GITAEC] add viewer

---
 modules/typesniffer/typesniffer.go |  16 ++++
 routers/web/repo/view.go           |   2 +
 templates/repo/view_file.tmpl      | 123 +++++++++++++++++++++++++++++
 3 files changed, 141 insertions(+)

diff --git a/modules/typesniffer/typesniffer.go b/modules/typesniffer/typesniffer.go
index 8cb1513a88..36783bf06a 100644
--- a/modules/typesniffer/typesniffer.go
+++ b/modules/typesniffer/typesniffer.go
@@ -40,6 +40,7 @@ var (
 	svgComment       = regexp.MustCompile(`(?s)<!--.*?-->`)
 	svgTagRegex      = regexp.MustCompile(`(?si)\A\s*(?:(<!DOCTYPE\s+svg([\s:]+.*?>|>))\s*)*<svg\b`)
 	svgTagInXMLRegex = regexp.MustCompile(`(?si)\A<\?xml\b.*?\?>\s*(?:(<!DOCTYPE\s+svg([\s:]+.*?>|>))\s*)*<svg\b`)
+	ifcRegex         = regexp.MustCompile(`(?si)ISO\-10303\-21\;`)
 )
 
 // SniffedType contains information about a blobs type.
@@ -67,6 +68,11 @@ func (ct SniffedType) IsPDF() bool {
 	return strings.Contains(ct.contentType, "application/pdf")
 }
 
+// IsIFC detects if data is a IFC format
+func (ct SniffedType) IsIFC() bool {
+	return strings.Contains(ct.contentType, "ifc/")
+}
+
 // IsVideo detects if data is an video format
 func (ct SniffedType) IsVideo() bool {
 	return strings.Contains(ct.contentType, "video/")
@@ -123,6 +129,14 @@ func (ct SniffedType) GetMimeType() string {
 	return strings.SplitN(ct.contentType, ";", 2)[0]
 }
 
+func DetectContentFromData(ct string, data []byte) string {
+	if ifcRegex.Match(data) {
+		return "ifc/"
+	} else {
+		return ct
+	}
+}
+
 // DetectContentType extends http.DetectContentType with more content types. Defaults to text/unknown if input is empty.
 func DetectContentType(data []byte, filename string) SniffedType {
 	if len(data) == 0 {
@@ -189,6 +203,8 @@ func DetectContentType(data []byte, filename string) SniffedType {
 		ct = GLBMimeType
 	}
 
+	ct = DetectContentFromData(ct, data)
+
 	return SniffedType{ct}
 }
 
diff --git a/routers/web/repo/view.go b/routers/web/repo/view.go
index 3b11d73390..eb4a8243c5 100644
--- a/routers/web/repo/view.go
+++ b/routers/web/repo/view.go
@@ -620,6 +620,8 @@ func renderFile(ctx *context.Context, entry *git.TreeEntry) {
 
 	case fInfo.st.IsPDF():
 		ctx.Data["IsPDFFile"] = true
+	case fInfo.st.IsIFC():
+		ctx.Data["IsIFC"] = true
 	case fInfo.st.IsVideo():
 		ctx.Data["IsVideoFile"] = true
 	case fInfo.st.IsAudio():
diff --git a/templates/repo/view_file.tmpl b/templates/repo/view_file.tmpl
index 65be791405..b764b1052c 100644
--- a/templates/repo/view_file.tmpl
+++ b/templates/repo/view_file.tmpl
@@ -136,6 +136,129 @@
 						{{else}}
 							<a href="{{$.RawFileLink}}" rel="nofollow">{{ctx.Locale.Tr "repo.file_view_raw"}}</a>
 						{{end}}
+						<div class="pdf-content is-loading" data-src="{{$.RawFileLink}}" data-fallback-button-text="{{ctx.Locale.Tr "repo.diff.view_file"}}"></div>
+					{{else if .IsIFC}}
+
+
+<div class="full-screen" id="container" style="width: 100%;height:500px;"></div>
+<script type="module">
+
+    import * as THREE from "https://unpkg.com/three@0.152.2/build/three.module.js";
+	import * as OBC from "/assets/js/openbim-components.js";
+    import * as WEBIFC from "https://unpkg.com/web-ifc@0.0.50/web-ifc-api.js";
+    import Stats from "https://unpkg.com/stats-js@1.0.1/src/Stats.js";
+    import * as dat from "https://unpkg.com/three@0.152.2/examples/jsm/libs/lil-gui.module.min.js";
+    import {downloadZip} from "https://unpkg.com/client-zip@2.3.0/index.js";
+
+    const container = document.getElementById('container');
+    const components = new OBC.Components();
+
+    components.scene = new OBC.SimpleScene(components);
+    components.renderer = new OBC.PostproductionRenderer(components, container);
+    components.camera = new OBC.SimpleCamera(components);
+    components.raycaster = new OBC.SimpleRaycaster(components);
+
+    components.init();
+
+    components.renderer.postproduction.enabled = true;
+    const scene = components.scene.get();
+    components.camera.controls.setLookAt(12, 6, 8, 0, 0, -10);
+    components.scene.setup();
+
+    const grid = new OBC.SimpleGrid(components, new THREE.Color(0x666666));
+    const customEffects = components.renderer.postproduction.customEffects;
+    customEffects.excludedMeshes.push(grid.get());
+
+    let fragments = new OBC.FragmentManager(components);
+    let fragmentIfcLoader = new OBC.FragmentIfcLoader(components);
+
+    const mainToolbar = new OBC.Toolbar(components, { name: 'Main Toolbar', position: 'bottom' });
+    components.ui.addToolbar(mainToolbar);
+    const ifcButton = fragmentIfcLoader.uiElement.get("main");
+    mainToolbar.addChild(ifcButton);
+
+    await fragmentIfcLoader.setup()
+
+    const excludedCats = [
+        WEBIFC.IFCTENDONANCHOR,
+        WEBIFC.IFCREINFORCINGBAR,
+        WEBIFC.IFCREINFORCINGELEMENT,
+    ];
+
+    for(const cat of excludedCats) {
+        fragmentIfcLoader.settings.excludedCategories.add(cat);
+    }
+
+    fragmentIfcLoader.settings.webIfc.COORDINATE_TO_ORIGIN = true;
+    fragmentIfcLoader.settings.webIfc.OPTIMIZE_PROFILES = true;
+
+    async function loadIfcAsFragments() {
+		//const testpath="http://localhost:3014/rvba/test/src/branch/main/1019-column.ifc"
+		//const testpath="/rvba/test/src/branch/main/1019-column.ifc"
+		//const testpath="http://localhost:3014/rvba/test/raw/branch/main/1019-column.ifc"
+		const testpath="{{$.RawFileLink}}"
+		//const testpath="http://localhost:3014/rvba/test/src/branch/main/example.ifc"
+        //const file = await fetch('./small.ifc');
+        const file = await fetch(testpath);
+        const data = await file.arrayBuffer();
+        const buffer = new Uint8Array(data);
+        const model = await fragmentIfcLoader.load(buffer, "example");
+        scene.add(model);
+    }
+
+    async function exportFragments() {
+        if (!fragments.groups.length) return;
+        const group = fragments.groups[0];
+        const data = fragments.export(group);
+        const blob = new Blob([data]);
+        const fragmentFile = new File([blob], 'small.frag');
+
+        const files = [];
+        files.push(fragmentFile);
+        files.push(new File([JSON.stringify(group.properties)], 'small.json'));
+        const result = await downloadZip(files).blob();
+        result.name = 'example';
+        download(result);
+    }
+
+    function download(file) {
+        const link = document.createElement('a');
+        link.href = URL.createObjectURL(file);
+        link.download = file.name;
+        document.body.appendChild(link);
+        link.click();
+        link.remove();
+    }
+
+    function disposeFragments() {
+        fragments.dispose();
+    }
+
+    const stats = new Stats();
+    stats.showPanel(2);
+    document.body.append(stats.dom);
+    stats.dom.style.left = '0px';
+    const renderer = components.renderer;
+    renderer.onBeforeUpdate.add(() => stats.begin());
+    renderer.onAfterUpdate.add(() => stats.end());
+
+	window.dispatchEvent(new Event('resize'));
+
+    const settings = {
+        loadFragments: () => loadIfcAsFragments(),
+        exportFragments: () => exportFragments(),
+        disposeFragments: () => disposeFragments(),
+    };
+
+    const gui = new dat.GUI();
+
+    //gui.add(settings, 'loadFragments').name('Import fragments');
+    //gui.add(settings, 'exportFragments').name('Export fragments');
+    //gui.add(settings, 'disposeFragments').name('Dispose fragments');
+
+    loadIfcAsFragments();
+
+</script>
 					{{else}}
 						<a href="{{$.RawFileLink}}" rel="nofollow">{{ctx.Locale.Tr "repo.file_view_raw"}}</a>
 					{{end}}