feat: add header and sidebar components for Dash layout (Task 2.1)

- header.py: NHS branded top bar with logo, title, breadcrumb, data freshness indicators (record count + last updated with IDs for callback updates) - sidebar.py: Navigation with 7 items across Analysis/Reports sections, SVG icons via data URI, Drug Selection and Indications items have IDs for drawer open callbacks (Phase 4) - app.py: Assembles header + sidebar + main content placeholder - nhs.css: Added .sidebar__icon rule for img-based SVG icons
2026-02-06 13:13:03 +00:00
parent 76549420a0
commit bdc1690f0f
5 changed files with 160 additions and 9 deletions
@@ -0,0 +1,96 @@
+"""Left sidebar navigation component matching 01_nhs_classic.html design."""
+from urllib.parse import quote as url_quote
+
+from dash import html
+
+
+def _svg_icon(svg_body):
+    """Wrap an SVG body string into an html.Img using a data URI.
+
+    This avoids needing dash-svg or dangerouslySetInnerHTML.
+    The SVG icons are copied from 01_nhs_classic.html.
+    """
+    svg = (
+        f'<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" '
+        f'fill="none" stroke="currentColor" stroke-width="2">{svg_body}</svg>'
+    )
+    return html.Img(
+        src=f"data:image/svg+xml,{url_quote(svg)}",
+        className="sidebar__icon",
+    )
+
+
+# SVG icon bodies from 01_nhs_classic.html
+_ICONS = {
+    "pathway": '<rect x="3" y="3" width="7" height="7"/><rect x="14" y="3" width="7" height="7"/><rect x="14" y="14" width="7" height="7"/><rect x="3" y="14" width="7" height="7"/>',
+    "drug": '<circle cx="12" cy="12" r="3"/><path d="M19.4 15a1.65 1.65 0 00.33 1.82l.06.06a2 2 0 010 2.83 2 2 0 01-2.83 0l-.06-.06a1.65 1.65 0 00-1.82-.33 1.65 1.65 0 00-1 1.51V21a2 2 0 01-4 0v-.09A1.65 1.65 0 009 19.4a1.65 1.65 0 00-1.82.33l-.06.06a2 2 0 01-2.83 0 2 2 0 010-2.83l.06-.06A1.65 1.65 0 004.68 15a1.65 1.65 0 00-1.51-1H3a2 2 0 010-4h.09A1.65 1.65 0 004.6 9a1.65 1.65 0 00-.33-1.82l-.06-.06a2 2 0 012.83-2.83l.06.06A1.65 1.65 0 009 4.68a1.65 1.65 0 001-1.51V3a2 2 0 014 0v.09a1.65 1.65 0 001 1.51 1.65 1.65 0 001.82-.33l.06-.06a2 2 0 012.83 2.83l-.06.06A1.65 1.65 0 0019.4 9a1.65 1.65 0 001.51 1H21a2 2 0 010 4h-.09a1.65 1.65 0 00-1.51 1z"/>',
+    "trust": '<path d="M3 9l9-7 9 7v11a2 2 0 01-2 2H5a2 2 0 01-2-2z"/>',
+    "directory": '<path d="M22 19a2 2 0 01-2 2H4a2 2 0 01-2-2V5a2 2 0 012-2h5l2 3h9a2 2 0 012 2z"/>',
+    "indication": '<path d="M14 2H6a2 2 0 00-2 2v16a2 2 0 002 2h12a2 2 0 002-2V8z"/><polyline points="14,2 14,8 20,8"/>',
+    "cost": '<line x1="18" y1="20" x2="18" y2="10"/><line x1="12" y1="20" x2="12" y2="4"/><line x1="6" y1="20" x2="6" y2="14"/>',
+    "export": '<path d="M21 15v4a2 2 0 01-2 2H5a2 2 0 01-2-2v-4"/><polyline points="7 10 12 15 17 10"/><line x1="12" y1="15" x2="12" y2="3"/>',
+}
+
+
+def make_sidebar():
+    """Return the fixed left sidebar navigation."""
+    return html.Nav(
+        className="sidebar",
+        **{"aria-label": "Main navigation"},
+        children=[
+            # Analysis section
+            html.Div(
+                className="sidebar__section",
+                children=[
+                    html.Div("Analysis", className="sidebar__label"),
+                    _sidebar_item("Pathway Overview", "pathway", active=True),
+                    _sidebar_item(
+                        "Drug Selection", "drug", item_id="sidebar-drug-selection"
+                    ),
+                    _sidebar_item("Trust Selection", "trust"),
+                    _sidebar_item("Directory Selection", "directory"),
+                    _sidebar_item(
+                        "Indications", "indication", item_id="sidebar-indications"
+                    ),
+                ],
+            ),
+            # Reports section
+            html.Div(
+                className="sidebar__section",
+                children=[
+                    html.Div("Reports", className="sidebar__label"),
+                    _sidebar_item("Cost Analysis", "cost"),
+                    _sidebar_item("Export Data", "export"),
+                ],
+            ),
+            # Footer
+            html.Div(
+                className="sidebar__footer",
+                children=[
+                    "NHS Norfolk & Waveney ICB",
+                    html.Br(),
+                    "High Cost Drugs Programme",
+                ],
+            ),
+        ],
+    )
+
+
+def _sidebar_item(label, icon_key, active=False, item_id=None):
+    """Create a single sidebar navigation item."""
+    class_name = "sidebar__item"
+    if active:
+        class_name += " sidebar__item--active"
+
+    props = {"className": class_name}
+    if item_id:
+        props["id"] = item_id
+        props["n_clicks"] = 0
+
+    return html.A(
+        **props,
+        children=[
+            _svg_icon(_ICONS[icon_key]),
+            label,
+        ],
+    )