flows: rewrite shell to webcomponents

passbook/flows/templates/flows/shell.html

@@ -21,21 +21,12 @@
 {% endblock %}
 
 {% block main_container %}
-<main class="pf-c-login__main" id="flow-body">
+<flow-shell-card
-    <div class="pf-c-login__main-body pb-loading">
+    class="pf-c-login__main"
-        <span class="pf-c-spinner" role="progressbar" aria-valuetext="Loading...">
+    flowBodyUrl="{{ exec_url }}">
-            <span class="pf-c-spinner__clipper"></span>
+</flow-shell-card>
-            <span class="pf-c-spinner__lead-ball"></span>
-            <span class="pf-c-spinner__tail-ball"></span>
-        </span>
-    </div>
-</main>
 <script>
-const flowBodyUrl = "{{ exec_url }}";
 const messagesUrl = "{{ msg_url }}";
-const flowBody = document.querySelector("#flow-body");
-const spinner = document.querySelector(".pb-loading");
-
 const updateMessages = () => {
     let messageContainer = document.querySelector(".pf-c-alert-group");
     fetch(messagesUrl).then(response => {
@@ -79,77 +70,8 @@ const updateMessages = () => {
         });
     });
 };
-const updateCard = (data) => {
-    switch (data.type) {
-        case "redirect":
-            window.location = data.to
-            break;
-        case "template":
-            flowBody.innerHTML = data.body;
-            checkAutofocus();
-            updateMessages();
-            loadFormCode();
-            setFormSubmitHandlers();
-        default:
-            break;
-    }
-};
-const showSpinner = () => {
-    flowBody.innerHTML = "";
-    flowBody.appendChild(spinner);
-};
-const loadFormCode = () => {
-    document.querySelectorAll("#flow-body script").forEach(script => {
-        let newScript = document.createElement("script");
-        newScript.src = script.src;
-        document.head.appendChild(newScript);
-    });
-};
-const checkAutofocus = () => {
-    const autofocusElement = document.querySelector("#flow-body [autofocus]");
-    if (autofocusElement !== null) {
-        autofocusElement.focus();
-    }
-};
-const updateFormAction = (form) => {
-    for (let index = 0; index < form.elements.length; index++) {
-        const element = form.elements[index];
-        if (element.value === form.action) {
-            console.log("pb-flow: Found Form action URL in form elements, not changing form action.");
-            return false;
-        }
-    }
-    form.action = flowBodyUrl;
-    console.log(`pb-flow: updated form.action ${flowBodyUrl}`);
-    return true;
-};
-const checkAutosubmit = (form) => {
-    if ("autosubmit" in form.attributes) {
-        return form.submit();
-    }
-};
-const setFormSubmitHandlers = () => {
-    document.querySelectorAll("#flow-body form").forEach(form => {
-        console.log(`pb-flow: Checking for autosubmit attribute ${form}`);
-        checkAutosubmit(form);
-        console.log(`pb-flow: Setting action for form ${form}`);
-        updateFormAction(form);
-        console.log(`pb-flow: Adding handler for form ${form}`);
-        form.addEventListener('submit', (e) => {
-            e.preventDefault();
-            let formData = new FormData(form);
-            showSpinner();
-            fetch(flowBodyUrl, {
-                method: 'post',
-                body: formData,
-            }).then(response => response.json()).then(data => {
-                updateCard(data);
-            });
-        });
-        form.classList.add("pb-flow-wrapped");
-    });
-};
 
-fetch(flowBodyUrl).then(response => response.json()).then(data => updateCard(data));
+
+// fetch(flowBodyUrl).then(response => response.json()).then(data => updateCard(data));
 </script>
 {% endblock %}

passbook/static/static/src/FlowShellCard.js

@@ -0,0 +1,113 @@
+import { LitElement, html } from 'lit-element';
+
+class FetchFillSlot extends LitElement {
+
+    static get properties() {
+        return {
+            flowBodyUrl: { type: String },
+            flowBody: { type: String },
+        };
+    }
+
+    createRenderRoot() {
+        return this;
+    }
+
+    firstUpdated() {
+        fetch(this.flowBodyUrl).then(r => r.json()).then(r => this.updateCard(r));
+    }
+
+    async updateCard(data) {
+        switch (data.type) {
+            case "redirect":
+                window.location = data.to
+                break;
+            case "template":
+                this.flowBody = data.body;
+                await this.requestUpdate();
+                this.checkAutofocus();
+                // this.updateMessages();
+                this.loadFormCode();
+                this.setFormSubmitHandlers();
+            default:
+                break;
+        }
+    };
+
+    loadFormCode() {
+        this.querySelectorAll("script").forEach(script => {
+            let newScript = document.createElement("script");
+            newScript.src = script.src;
+            document.head.appendChild(newScript);
+        });
+    }
+
+    checkAutofocus() {
+        const autofocusElement = this.querySelector("[autofocus]");
+        if (autofocusElement !== null) {
+            autofocusElement.focus();
+        }
+    }
+
+    updateFormAction(form) {
+        for (let index = 0; index < form.elements.length; index++) {
+            const element = form.elements[index];
+            if (element.value === form.action) {
+                console.log("pb-flow: Found Form action URL in form elements, not changing form action.");
+                return false;
+            }
+        }
+        form.action = this.flowBodyUrl;
+        console.log(`pb-flow: updated form.action ${this.flowBodyUrl}`);
+        return true;
+    }
+
+    checkAutosubmit(form) {
+        if ("autosubmit" in form.attributes) {
+            return form.submit();
+        }
+    }
+
+    setFormSubmitHandlers() {
+        this.querySelectorAll("form").forEach(form => {
+            console.log(`pb-flow: Checking for autosubmit attribute ${form}`);
+            this.checkAutosubmit(form);
+            console.log(`pb-flow: Setting action for form ${form}`);
+            this.updateFormAction(form);
+            console.log(`pb-flow: Adding handler for form ${form}`);
+            form.addEventListener('submit', (e) => {
+                e.preventDefault();
+                let formData = new FormData(form);
+                this.flowBody = undefined;
+                fetch(this.flowBodyUrl, {
+                    method: 'post',
+                    body: formData,
+                }).then(response => response.json()).then(data => {
+                    this.updateCard(data);
+                });
+            });
+            form.classList.add("pb-flow-wrapped");
+        });
+    }
+
+    loading() {
+        return html`
+            <div class="pf-c-login__main-body pb-loading">
+                <span class="pf-c-spinner" role="progressbar" aria-valuetext="Loading...">
+                    <span class="pf-c-spinner__clipper"></span>
+                    <span class="pf-c-spinner__lead-ball"></span>
+                    <span class="pf-c-spinner__tail-ball"></span>
+                </span>
+            </div>`;
+    }
+
+    render() {
+        if (this.flowBody !== undefined) {
+            // return html`<main class="pf-c-login__main">${unsafeHTML(this.flowBody)}</div>`;
+            return html([this.flowBody]);
+        }
+        return this.loading();
+    }
+}
+
+customElements.define('flow-shell-card', FetchFillSlot);

passbook/static/static/src/passbook.js

@@ -1,4 +1,5 @@
 import './FetchFillSlot.js';
+import './FlowShellCard.js';
 
 // Button Dropdowns
 document.querySelectorAll("button.pf-c-dropdown__toggle").forEach((b) => {