Implemented d4s storage tree and folder web components
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/**
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* Base class of <d4s-storage-tree> and <d4s-storage-folder>
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*/
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class D4SStorageHtmlElement extends HTMLElement {
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#d4s = null
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#d4smissmsg = 'Required d4s-boot-2 component not found'
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//#baseurl = 'https://api.dev.d4science.org'
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#baseurl = 'https://storagehub.pre.d4science.net/storagehub/workspace'
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constructor() {
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super()
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}
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appendStylesheets(root) {
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const linkElem1 = document.createElement('link')
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linkElem1.setAttribute('rel', 'stylesheet')
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linkElem1.setAttribute('href', 'https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css')
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const linkElem2 = document.createElement('link')
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linkElem2.setAttribute('rel', 'stylesheet')
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linkElem2.setAttribute('href', 'https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.1.1/css/all.min.css')
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root.appendChild(linkElem1)
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root.appendChild(linkElem2)
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}
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get d4s() {
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if (this.#d4s == null) {
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this.#d4s = document.querySelector('d4s-boot-2')
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if (!this.#d4s) {
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console.error(this.#d4smissmsg)
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}
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}
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return this.#d4s
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}
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buildListUrl(id) {
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return this.#baseurl + '/items/' + id + '/children'
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}
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get baseUrl() {
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return this.#baseurl
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}
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set baseUrl(url) {
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this.#baseurl = url
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this.setAttribute("baseurl", url)
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}
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}
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/**
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* Builds storagehub VREFolder tree
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* <d4s-storage-tree
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* /@filelist-id: identifier of d4s-storage-folder component
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* /@baseurl: the base endpoint url [defaults to: https://storagehub.pre.d4science.net/storagehub/workspace]
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*/
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window.customElements.define('d4s-storage-tree', class extends D4SStorageHtmlElement {
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#storageFilelistId = null
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#loadedClass = 'loaded'
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#selectedClass = 'selected'
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#selectedbgcolor = 'lightgray'
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constructor() {
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super()
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}
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/*
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Notes:
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API docs: https://gcube.wiki.gcube-system.org/gcube/StorageHub_REST_API
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Preprod: https://accounts.pre.d4science.org
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Sample context: %2Fpred4s%2Fpreprod%2FpreVRE
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User workspace: https://storagehub.pre.d4science.net/storagehub/workspace
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vrefolder: https://storagehub.pre.d4science.net/storagehub/workspace/vrefolder
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-> and if "id": "e0cd15d2-0071-43ca-bc42-aef8d80660fe",
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the tree dir of vrefolder: https://storagehub.pre.d4science.net/storagehub/workspace/items/e0cd15d2-0071-43ca-bc42-aef8d80660fe/children
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download of a file (domenica.jpg): https://storagehub.pre.d4science.net/storagehub/workspace/items/a5086811-59d1-4230-99fa-98431e820cf1/download
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*/
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connectedCallback() {
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const shadowRoot = this.attachShadow({mode: 'open'})
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this.appendStylesheets(shadowRoot)
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var div = document.createElement('div')
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const style = `
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<style>
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.selected > *:first-child {
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background-color: ${this.#selectedbgcolor};
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}
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ul, li {
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list-style-type: none;
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}
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li {
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cursor: pointer;
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}
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</style>
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`
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div.innerHTML = style
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this.d4s.service(
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this.baseUrl + '/vrefolder',
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'GET', null,
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(resp) => {
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this.parseResponse(div, resp)
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shadowRoot.appendChild(div)
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},
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(err) => { alert(err) }
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)
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}
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parseResponse(parentElement, response) {
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parentElement.classList.add(this.#loadedClass)
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var ul = document.createElement('ul')
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ul.classList.add('nested')
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var jresp = JSON.parse(response)
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if (jresp.item) {
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const itemname = jresp.item.displayName
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const itemid = jresp.item.id
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const path = this.buildListUrl(itemid)
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ul.appendChild(this.createListItem(itemname, itemid))
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parentElement.appendChild(ul)
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} else if (jresp.itemlist) {
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jresp
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.itemlist
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.filter(item => item['@class'].includes('FolderItem'))
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.forEach(item => {
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const itemname = item.name
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const itemid = item.id
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const path = this.buildListUrl(itemid)
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ul.appendChild(this.createListItem(itemname, itemid))
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})
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parentElement.appendChild(ul)
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} else {
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console.error(jresp)
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}
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}
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createListItem(label, id) {
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var li = document.createElement('li')
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li.setAttribute('data-id', id)
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var child = document.createElement('span')
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child.innerHTML = label
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li.appendChild(child)
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li.addEventListener('click', (ev) => {
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ev.stopPropagation()
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this.select(ev.currentTarget.getAttribute('data-id'))
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})
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return li
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}
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select(id) {
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var li = this.shadowRoot.querySelector(`*[data-id='${id}']`)
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this.displayPath(li)
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// if it was already selected then do nothing
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if (li.classList.contains(this.#selectedClass)) {
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this.toggleULDisplay(li)
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return
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}
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// switch selected and lists folder contents
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if (!li.classList.contains(this.#selectedClass)) {
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const selected = this.shadowRoot.querySelector('.' + this.#selectedClass)
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if (selected) {
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selected.classList.remove(this.#selectedClass)
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}
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li.classList.add(this.#selectedClass)
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if (this.#storageFilelistId) {
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var folder = document.getElementById(this.#storageFilelistId)
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folder.join(this)
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folder.list(id)
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}
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}
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if (li.classList.contains(this.#loadedClass)) {
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return
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}
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this.d4s.service(
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this.buildListUrl(id),
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'GET', null,
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(resp) => this.parseResponse(li, resp),
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(err) => { alert(err) }
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)
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}
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displayPath(li) {
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var curr = li
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while (curr.parentElement != null) {
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if (curr.parentElement.tagName == 'UL') {
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curr.parentElement.style.display = 'block'
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}
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curr = curr.parentElement
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}
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}
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toggleULDisplay(li) {
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const ul = li.querySelector('ul')
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if (ul) {
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ul.style.display = (ul.style.display === 'none') ? 'block' : 'none'
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}
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}
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static get observedAttributes() {
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return ["base-url", "filelist-id"];
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}
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attributeChangedCallback(name, oldValue, newValue) {
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if (oldValue !== newValue) {
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switch (name) {
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case "filelist-id":
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this.#storageFilelistId = newValue
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break
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case "base-url":
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this.baseUrl = newValue
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break
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}
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}
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}
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get filelistId() {
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return this.#storageFilelistId
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}
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set filelistId(id) {
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this.#storageFilelistId = id
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this.setAttribute("filelist-id", id)
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}
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})
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/**
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* Lists elements in selected folder
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*
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* <d4s-storage-folder
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* /@id: specify the id to join this component with storage tree component
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* /@baseurl: the base endpoint url [defaults to: https://storagehub.pre.d4science.net/storagehub/workspace]
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*/
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window.customElements.define('d4s-storage-folder', class extends D4SStorageHtmlElement {
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#d4sstorageTree = null
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#selectedbgcolor = 'lightgray'
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constructor() {
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super()
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}
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connectedCallback() {
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const shadowRoot = this.attachShadow({mode: 'open'})
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this.appendStylesheets(shadowRoot)
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const style = document.createElement('style')
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style.innerHTML = `
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span {
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cursor: pointer;
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user-select: none;
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-moz-user-select: none;
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-webkit-user-select: none;
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-ms-user-select: none;
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}
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`
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shadowRoot.appendChild(style)
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this.createContainer()
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}
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createContainer() {
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var div = document.createElement('div')
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div.classList.add('d4s-folder')
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var child = this.shadowRoot.querySelector('.d4s-folder')
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if (child) {
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this.shadowRoot.removeChild(child)
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}
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this.shadowRoot.appendChild(div)
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return div
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}
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join(tree) {
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if (this.#d4sstorageTree == null) {
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this.#d4sstorageTree = tree
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}
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}
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list(folderId) {
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this.d4s.service(
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this.buildListUrl(folderId),
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'GET', null,
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(resp) => this.parseResponse(resp),
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(err) => { alert(err) }
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)
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}
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parseResponse(response) {
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const root = this.createContainer()
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var jresp = JSON.parse(response)
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if (jresp.itemlist) {
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jresp.itemlist.forEach(item => root.appendChild(this.createFileRow(item)))
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} else {
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console.error(jresp)
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}
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}
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createFileRow(item) {
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var div = document.createElement('div')
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div.classList.add('row')
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var filename = document.createElement('div')
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filename.classList.add('col')
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var name = `<span>${item.name}</span>`
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filename.innerHTML = this.iconTag(item) + name
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const isFolder = item['@class'].includes('FolderItem')
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filename.addEventListener('click', (ev) => {
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ev.stopPropagation()
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if (isFolder) {
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const span = ev.currentTarget.querySelector(':nth-child(2)')
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if (span) {
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span.style = 'background-color: ' + this.#selectedbgcolor
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}
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if (this.#d4sstorageTree != null) {
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this.#d4sstorageTree.select(item.id)
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}
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} else {
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console.info("Download of " + item.id)
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this.d4s.download(this.buildDownloadUrl(item.id), item.name)
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}
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})
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div.appendChild(filename)
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return div
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}
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iconTag(item) {
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var i = `<i class="fa-regular fa-file fa-fw"></i>`
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if (item['@class'].includes('FolderItem')) {
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i = `<i class="fa-regular fa-folder fa-fw"></i>`
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} else if (item['@class'].includes('ImageFile')) {
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i = `<i class="fa-regular fa-image fa-fw"></i>`
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} else if (item['@class'].includes('PDFFileItem')) {
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i = `<i class="fa-regular fa-file-pdf fa-fw"></i>`
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}
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return '<span class="px-2">' + i + '</span>'
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}
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buildDownloadUrl(id) {
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return this.baseUrl+ '/items/' + id + '/download'
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}
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static get observedAttributes() {
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return ["base-url"];
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}
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attributeChangedCallback(name, oldValue, newValue) {
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if (oldValue !== newValue) {
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switch (name) {
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case "base-url":
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this.baseUrl = newValue
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break
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}
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}
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}
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})
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