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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>RO-Crate Preview Builder</title>
<style>
body {
font-family: Arial, Helvetica, sans-serif;
margin: 0;
padding: 0;
background-color: #f4f4f4;
}
header {
background-color: #007acc;
color: white;
padding: 1em;
text-align: center;
}
main {
padding: 2em;
max-width: 800px;
margin: 0 auto;
background-color: white;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
button {
background-color: #007acc;
color: white;
border: none;
padding: 0.5em 1em;
font-size: 1em;
cursor: pointer;
border-radius: 5px;
margin-top: 1em;
}
button:hover {
background-color: #005fa3;
}
textarea {
width: 100%;
padding: 1em;
font-size: 1em;
border: 1px solid #ccc;
border-radius: 5px;
margin-top: 1em;
}
.message {
margin-top: 1em;
color: #ff0000;
}
.output {
margin-top: 2em;
}
</style>
<script type="module">
import { ROCrate } from "https://cdn.skypack.dev/ro-crate";
import nunjucks from "https://cdn.skypack.dev/nunjucks";
import WKT from "https://cdn.skypack.dev/terraformer-wkt-parser";
function expandPropertyValue(crate, property, value) {
const vals = [];
if (property === "@id" || property === "@value") {
return value;
}
for (let val of value) {
const returnVal = {
value: "",
target_id: "",
target_name: "",
url: "",
geoJSON: null
};
if (val["@id"]) {
if (val["@id"] === "ro-crate-metadata.json") {
continue;
}
const target = crate.getEntity(val["@id"]);
if (target) {
returnVal.target_id = val["@id"];
const name = target.name?.join(", ") || val["@id"];
returnVal.target_name = name;
} else {
try {
const disposable = new URL(val["@id"]);
returnVal.url = val["@id"];
} catch (error) {
returnVal.value = val;
}
}
} else {
if (property === "asWKT") {
try {
returnVal.geoJSON = WKT.parse(val);
} catch (error) {
console.error(`Error parsing WKT: ${error}`);
}
returnVal.value = val;
} else {
returnVal.value = val;
}
}
//console.log(returnVal)
if (returnVal.value || returnVal.target_id || returnVal.url || returnVal.geoJSON) {
vals.push(returnVal);
}
}
return vals;
}
function initializeProp(crate, entityLite, prop){
const uri = crate.resolveTerm(prop) || prop;
if (!entityLite.props[uri]) {
entityLite.props[uri] = {
fwd: [],
rev: [],
label: prop,
};
}
if (uri === prop)
{
entityLite.props[uri].url = null;
} else if (crate.getEntity(uri)) {
entityLite.props[uri].url = `#${uri}`;
} else {
entityLite.props[uri].url = uri;
}
return uri;
}
async function roCrateToJSON(metadata) {
const crate = new ROCrate(metadata, { array: true, link: true });
await crate.resolveContext();
const crateLite = { entryPoint: crate.rootDataset["@id"], ids: {} };
for (let entity of crate.entities()) {
const id = entity["@id"];
const entityLite = { id: entity["@id"], type: entity["@type"], props: {} };
for (let prop of Object.keys(entity)) {
if (["@id", "@type"].includes(prop)) {
continue;
}
const uri = initializeProp(crate, entityLite, prop);
entityLite.props[uri].fwd =
(prop, expandPropertyValue(crate, prop, entity[prop]));
for (let prop of Object.keys(entity["@reverse"])) {
const uri = initializeProp(crate, entityLite, prop);
entityLite.props[uri].rev = expandPropertyValue(
crate,
prop,
entity["@reverse"][prop]
);
}
}
crateLite.ids[id] = entityLite;
}
return crateLite;
}
/*
* Render JSON as HTML
* @param {Object} metadata - The processed metadata object of the RO-Crate
* @param {String} layoutPath - The path to the layout file which groups properties
* @returns {String} The rendered HTML
*
*/
function renderTemplate(data, template, layout) {
const env = nunjucks.configure({ autoescape: true });
env.addFilter("setProp", function (obj, key) {
obj[key] = true;
return obj;
});
return env.renderString(template, { data, layout });
}
export { roCrateToJSON, renderTemplate };
document.addEventListener('DOMContentLoaded', () => {
const output = document.getElementById('output');
const message = document.getElementById('message');
const loadButton = document.getElementById('loadButton');
const generateButton = document.getElementById('generateButton');
async function processROCrate(text) {
const metadata = JSON.parse(text);
const crate = new ROCrate(metadata, { array: true, link: true });
const layout = [{"name":"About","help":"The core metadata for this RO-Crate and its subject matter.","inputs":["@id","@type","http://purl.org/dc/terms/conformsTo","http://schema.org/name","http://schema.org/familyName","http://schema.org/givenName","http://schema.org/description","http://schema.org/conformsTo","http://schema.org/datePublished","http://schema.org/license","http://schema.org/usageInfo","http://schema.org/about","http://schema.org/mentions","http://schema.org/mainEntity","http://schema.org/sameAs","http://schema.org/language"]},{"name":"Related People, Orgs & Works","help":"The context for the creation of this RO-Crate; who made it, funded it etc.","inputs":["http://schema.org/author","http://schema.org/creator","http://schema.org/publisher","http://schema.org/accountablePerson","http://schema.org/funder","http://schema.org/affiliation","http://schema.org/citation"]},{"name":"Structure","help":"How the parts of this RO-Crate relate, such as collection and object relationships.","inputs":["http://pcdm.org/models#memberOf","http://pcdm.org/models#hasMember","http://schema.org/isPartOf","http://schema.org/hasPart","http://pcdm.org/models#fileOf","http://pcdm.org/models#hasFile","http://schema.org/inDefinedTermSet","http://schema.org/hasDefinedTerm"]},{"name":"Provenance","help":"Detailed description of how entities were created, by whom and with which tools.","inputs":["http://schema.org/agent","http://schema.org/object","http://schema.org/instrument","http://schema.org/result","http://schema.org/participant","http://schema.org/target"]},{"name":"Space & Time","help":"Where and when the data was collected; the times and places it mentions or describes.","inputs":["http://schema.org/temporalCoverage","http://schema.org/spatialCoverage","http://schema.org/contentLocation","http://schema.org/locationCreated","http://schema.org/geo","http://www.opengis.net/ont/geosparql#asWKT","http://schema.org/address"]},{"name":"Software & Hardware","help":"For computer programs and execution environments that could be used to create data, have created data, or are being packaged and described.","inputs":["http://schema.org/availableOnDevice","http://schema.org/downloadUrl","http://schema.org/installUrl","http://schema.org/memoryRequirements","http://schema.org/operatingSystem","http://schema.org/processorRequirements","http://schema.org/programmingLanguage","http://schema.org/releaseNotes","http://schema.org/runtimePlatform","http://schema.org/runtime","http://schema.org/screenshot","http://schema.org/softwareAddOn","http://schema.org/softwareHelp","http://schema.org/softwareRequirements","http://schema.org/softwareVersion","http://schema.org/storageRequirements","http://schema.org/supportingData"]}];
const base64Template = ` <html lang="en">   <head>     <meta charset="utf-8">     <meta name="viewport" content="width=device-width, initial-scale=1.0">     <title>{{ title }}</title>     <style>     body{             font-family: Arial, Helvetica, sans-serif;             font-size: 1vw;             margin: 0;         }        h2.id {         font-size: 0.6em;         font-weight:lighter;       }       .long {          overflow: scroll;           max-height: 10em;       }       .entity {         display: none;         position: static;         top: 0;         width: 100%;         min-height: 100%;         z-index: 1000;         padding: 0px;         margin-bottom: 100vh; /* Adds a whole screen of blank space */      }     .entity:target {       display: block;       scroll-margin-top: 0; /* Ensures the entity is at the top of the viewport */     }       .roots {         margin-bottom: 100vh; /* Adds a whole screen of blank space */     }      .entity:target {       display: block;       scroll-margin-top: 0; /* Ensures the entity is at the top of the viewport */      }   span.type {     padding: 5px;     border-radius: 5px;     margin-right: 5px;     font-size: 0.6em;     font-weight:lighter; }  span.type::after  {     content:"\a";     white-space: pre; }    .button-left, .button-right {     margin-bottom: 10px;     padding: 2px 10px;     padding: 0;     cursor: pointer;     display: inline-flex;     align-items: center;     gap: 5px;      }  .button-left:hover, .button-right:hover {     color: #4e4e4e; }  .button-left a::before {     content: '⏴';      font-size: 1.2em;    }  .button-right a::after {     content: '⏵';     font-size: 1.2em;  }  .button-left a, .button-right a {     text-decoration: underline dotted 2px;     line-height: 2em;     text-underline-offset: 5px;     transition: all .3s ease-in;     color: #000000 }  .button-left a:hover, .button-right a:hover {     color: #4e4e4e; }  .property-grid {     margin:20px auto;     display: flex;     flex-direction: column;     gap: 0px;        width: 60%; }    .property-row {     display: flex;     justify-content: center;     align-items: center;     padding: 15px 50px; }  .entity-header-row {     width: 100%;       padding: 15px;     background-color: rgb(0, 0, 0);     color: #fff;     font-size: 1.75vw;     font-weight: bold; }  .entity-header-row h2 {     align-items: center;      text-align: center;     justify-content: center; /* Center horizontally */ }    .entity-header-row a {     color: #fff;     text-decoration: none;     font-size: 1em;     font-weight: bold;     text-decoration: underline dotted 2px;     text-underline-offset: 5px; }  .property-header-row {     display: flex;     justify-content: left; /* Center horizontally */     align-items: center;      text-align: center;     padding: 25px 50px;     margin-top:20px;     border-radius: 10px 10px 0 0;     background-color: rgb(0, 0, 0);     color:#fff;     font-size: 1.5vw;     font-weight:bold;     text-transform:capitalize; } .property-row:nth-child(odd) {     background-color: #f9fbf9; }  .property-row:nth-child(even) {     height: 20%;     background-color: #f0f0ee; }  .property-name {     flex: 1;     font-weight: bold; } .property-name a{     color:#000000;     text-decoration: none;     transition: all .2s ease-in;     font-size: 1em; }  .property-name a:hover{     color: #000000; }  .property-value {     flex: 2;     gap: 5px;     align-items: left;  }  /*.property-value button {     margin-bottom: 5px;     padding: 2px 10px;     border: none;     border-bottom: dotted 2px;     cursor: pointer;     transition: all .2s ease-in;     color: #000000; }  .property-value button a {     text-decoration: none;     font-weight: bold;     color: #000000; }  .property-value button a:hover {     color: #4e4e4e;  } */   </style>  <script>     document.addEventListener("DOMContentLoaded", function() {       const entryPointId = "{{ data.entryPoint | urlencode }}";       if (!window.location.hash) {         window.location.hash = entryPointId;       }     });      function search(input) {     li = input.parentNode.getElementsByTagName("div");     filter = input.value.toUpperCase();     count = li.length;     found = 0;       for (i = 0; i < li.length; i++) {           txtValue = li[i].textContent.toUpperCase() || "";           if (txtValue.indexOf(filter) > -1) {               li[i].style.display = "";               found ++           } else {               li[i].style.display = "none";           }         }     input.parentNode.getElementsByClassName("count")[0].innerText =  `${found} /  ${count}`; }   </script>    </head>      <body>  {% macro displayProp(prop, propData) %}     <div class="property-row">          <div class="property-name">             {{propData.label}}             {% if propData.url %}             <a href="{{ propData.url }}" target="_blank">ⓘ</a>             {% endif %}                  </div>         <div class="property-value">             {% if propData.fwd.length + propData.rev.length > 9 %}                              <input class="border" onkeyup="res = search(this)">             <span class="count"> ({{ propData.fwd.length + propData.rev.length }} / {{ propData.fwd.length + propData.rev.length }})</span>             <div class="long">                                  {% else %}             <div class="short">                                  {% endif %}          {% for val in propData.fwd %}         <div>                 {% if val is string %}             {{ val }}                                       {% elif val["url"] %}             <a href="{{ val["url"] }}"> {{ val["url"]  }}</a>             {% else %}                 {% if val["target_id"] %}                 <span class="button-right"><a href="#{{ val["target_id"] | urlencode }}"> {{ val["target_name"] }} </a></span>                                                    {% elif val.value %}                      {{ val.value }}                  {% else %}                 WARNING SOMETHING WENT WRONG {{ val | dump }}                 {% endif %}             {% endif %}         </div>         {% endfor %}                   {% for val in propData.rev %}                      <div>                 {% if val["target_id"] %}                 <span class="button-left"><a href="#{{ val["target_id"] | urlencode }}">  {{ val["target_name"] }} </a></span>                                  {% else %}                 WARNING SOMETHING WENT WRONG {{ val | dump }} ⬅                 {% endif %}             </div>         {% endfor %}         </div>          </div>     </div> {% endmacro %}   {% macro display(item, class) %} <div id="{{item.id | urlencode}}" class="{{class}}">     <div class = "entity-header-row">         <a href="#{{ data.entryPoint | urlencode }}" class="root">Root: {{ data.ids[data.entryPoint].props["http://schema.org/name"].fwd[0].value}} </a>           <h2>             {% for type in item.type %}                <span class="type">{{ type }}{% if not loop.last %}, {% endif %}</span>             {% endfor %}              {{ item.props["http://schema.org/name"].fwd[0].value }}         </h2>          <h2 class="id">{{ item.id }}</h2>     </div>     <div class="property-grid">         {% set seenProps = {"@id": true,"@type": true} %}         {% for group in layout %}             {% set hasContent = false %}             {% for input in group.inputs %}                 {% if item.props[input] %}                     {% set hasContent = true %}                     {% set seenProps = seenProps | setProp(input) %}                 {% endif %}             {% endfor %}             {% if hasContent %}                 <div class="property-header-row">{{ group.name }}</div>             {% endif %}             {% for input in group.inputs %}                 {% if item.props[input] %}                     {{ displayProp(input, item.props[input]) }}                 {% endif %}             {% endfor %}         {% endfor %}           {% set hasContent = false %}         {% for input, val in item.props %}             {% if not seenProps[input] %}                 {% set hasContent = true %}             {% endif %}         {% endfor %}          {% if hasContent %}             <div class="property-header-row">Other properties</div>         {% endif %}           {% for input, val in item.props %}            {% if not seenProps[input] %}                 {{ displayProp(input, item.props[input]) }}             {% endif %}         {% endfor %}        </div>        {% set htmlRegex = r/(\.txt)$|(\.html?)$/i %}       {% set audioRegex = r/(\.mp3)|(\.ogg?)|(\.wav)$/i %}       {% set imgRegex = r/(\.jpe?g)|(\.png|(\.giff?))$/i   %}       {% set vidRegex = r/(\.mp4)|(\.mov)$/i   %}        {% set pdfRegex = r/pdf$/i %}        {% if item.type.includes("File") %}         {% if   htmlRegex.test(item.id)  %}             <iframe src='{{item.id}}' type="text/plain" width='100%' height='500'         loading="lazy"></iframe>         {% elif  audioRegex.test(item.id)  %}              <audio controls><source src="{{ item.id }}"/></audio>         {% elif  vidRegex.test(item.id)  %}              <video io controls><source src="{{ item.id }}"/></video>         {% elif   imgRegex.test(item.id)  %}            <img width='100%' style='object-fit: contain' src="{{ item.id }}" loading="lazy"/>         {% elif  pdfRegex.test(item.id) %}           <iframe   src="{{ item.id }}" type="application/pdf" width="100%" height="600px" loading="lazy" />         {% endif %}       {% endif %}        </div>                         </div>  {% endmacro %}  {{ display(data.ids[data.entryPoint], "root") }}   {% for id, entity in data.ids %}   {% if id != data.entryPoint %}     {{ display(entity, "entity") }}   {% endif %}     {% endfor %}                   </body> </html>`;
const templateBytes = Uint8Array.from(atob(base64Template), c => c.charCodeAt(0));
const template = new TextDecoder('utf-8').decode(templateBytes);
const crateLite = await roCrateToJSON(metadata, layout);
const renderedHtml = renderTemplate(crateLite, template, layout);
return renderedHtml;
}
if (window.showOpenFilePicker && window.showSaveFilePicker) {
loadButton.style.display = 'inline-block';
loadButton.addEventListener('click', async () => {
try {
// Show file picker
const [fileHandle] = await window.showOpenFilePicker({
types: [{
description: 'RO-Crate Metadata',
accept: { 'application/json': ['.json'] }
}]
});
// Get file contents
const file = await fileHandle.getFile();
const text = await file.text();
const renderedHtml = await processROCrate(text);
// Save the rendered HTML to a file
const newFileHandle = await window.showSaveFilePicker({
suggestedName: 'ro-crate-preview.html',
types: [{
description: 'HTML File',
accept: { 'text/html': ['.html'] }
}]
});
const writableStream = await newFileHandle.createWritable();
await writableStream.write(renderedHtml);
await writableStream.close();
} catch (error) {
console.error('Error:', error);
}
});
}
generateButton.addEventListener('click', async () => {
try {
const text = document.getElementById('jsonInput').value;
const renderedHtml = await processROCrate(text);
// Open the rendered HTML in a new window
const blob = new Blob([renderedHtml], { type: 'text/html' });
const url = URL.createObjectURL(blob);
window.open(url, '_blank');
// Create a download link and trigger a click event to save the file
const a = document.createElement('a');
a.href = url;
a.download = 'ro-crate-preview.html';
document.body.appendChild(a);
a.click();
document.body.removeChild(a);
URL.revokeObjectURL(url);
} catch (error) {
console.error('Error:', error);
}
});
});
</script>
</head>
<body>
<header>
<h1>RO-Crate Preview Builder</h1>
</header>
<main>
<p id="message" class="message"></p>
<button id="loadButton" style="display: none;">Load RO-Crate from Disk</button>
<textarea id="jsonInput" rows="10" cols="50" placeholder="Paste your JSON-LD (ro-crate-metadata.json) source here..."></textarea>
<button id="generateButton" >Generate HTML from source & Download</button>
<div id="output" class="output"></div>
<template id="template"></template>
</main>
</body>
</html>