feat: implement JSON Viewer page and enhance Home page layout
- Added a new JSON Viewer page for visualizing and querying JSON data using JSONPath. - Updated the Home page with a new header, main call-to-action, and feature highlights for the JSON Visualiser tool. - Removed unused state and components from the Home page to streamline the layout.
This commit is contained in:
+37
-134
@@ -1,149 +1,52 @@
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import { useCallback, useMemo, useState } from "react"
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import jp from "jsonpath"
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import JsonTreeNode from "@/components/json-tree-node"
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import { Link } from "react-router-dom"
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/**
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* Home page component that displays the main landing content.
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*/
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export default function Home() {
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const initialData = {
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centre_id: "LON-01",
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location: "London",
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is_active: true,
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staff_members: [
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{ id: 101, name: "Alice", roles: ["Admin", "Manager"] },
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{ id: 102, name: "Bob", roles: ["Developer"] },
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],
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config: {
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colour_scheme: "Dark Mode",
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retention_days: 30,
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},
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}
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const [jsonInput, setJsonInput] = useState<string>(JSON.stringify(initialData, null, 2))
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const [query, setQuery] = useState<string>("$.staff_members[*].name")
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const [copied, setCopied] = useState(false)
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// Compute matching results
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const result = useMemo(() => {
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let parsed
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try {
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parsed = JSON.parse(jsonInput)
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} catch (e) {
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return { parsed: null, matchedPaths: [], matchedValues: [], error: (e as Error).message, queryError: null }
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}
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try {
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const nodes = jp.nodes(parsed, query)
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return {
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parsed,
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matchedPaths: nodes.map((n) => jp.stringify(n.path)),
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matchedValues: nodes.map((n) => n.value),
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error: null,
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queryError: null,
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}
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} catch (e) {
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// When JSONPath expression is invalid, still display the JSON tree but with no matches
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return { parsed, matchedPaths: [], matchedValues: [], error: null, queryError: (e as Error).message }
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}
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}, [jsonInput, query])
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// Copy as CSV
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const copyAsCsv = useCallback(() => {
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if (result.matchedValues.length === 0) return
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const escapeCsvValue = (val: unknown): string => {
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const str = typeof val === "object" ? JSON.stringify(val) : String(val)
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if (str.includes(",") || str.includes('"') || str.includes("\n")) {
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return `"${str.replace(/"/g, '""')}"`
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}
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return str
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}
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const header = query
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const rows = result.matchedValues.map(escapeCsvValue)
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const csv = [header, ...rows].join("\n")
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navigator.clipboard.writeText(csv).then(() => {
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setCopied(true)
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setTimeout(() => setCopied(false), 2000)
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})
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}, [query, result.matchedValues])
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return (
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<div className="h-full flex gap-4 overflow-hidden">
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{/* Left panel - 30% */}
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<div className="w-[30%] flex flex-col gap-4 min-h-0">
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{/* JSON Source - fills remaining height */}
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<div className="bg-white rounded-xl shadow-sm border border-slate-200 overflow-hidden flex-1 flex flex-col min-h-0">
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<div className="bg-slate-50 px-4 py-2 border-b border-slate-200 shrink-0">
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<span className="text-xs font-semibold uppercase tracking-wider text-slate-500">
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JSON Source
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</span>
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</div>
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<textarea
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className="flex-1 w-full p-4 font-mono text-sm outline-none focus:ring-2 focus:ring-indigo-500/20 transition-all resize-none overflow-auto"
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value={jsonInput}
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onChange={(e) => setJsonInput(e.target.value)}
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spellCheck={false}
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/>
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<div className="space-y-8 max-w-6xl mx-auto">
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{/* Page Header */}
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<div className="text-center">
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<h1 className="text-3xl font-bold text-gray-900 sm:text-4xl">JSON Visualiser</h1>
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<p className="mt-4 text-lg text-gray-600">
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A powerful, privacy-focused tool for debugging and visualising complex JSON data
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structures.
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</p>
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</div>
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{/* JSONPath Expression - fixed height */}
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<div className="bg-white rounded-xl shadow-sm border border-slate-200 p-4 shrink-0">
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<label className="flex items-center gap-2 text-xs font-semibold uppercase tracking-wider mb-2">
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<span className="text-slate-500">JSONPath Expression</span>
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{result.queryError && (
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<span className="text-red-500 normal-case">— Invalid syntax</span>
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)}
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</label>
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<input
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type="text"
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className={`w-full p-3 font-mono text-sm border rounded-lg focus:ring-2 outline-none transition-all shadow-sm ${
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result.queryError
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? "border-red-300 focus:ring-red-500 focus:border-red-500"
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: "border-slate-200 focus:ring-indigo-500 focus:border-indigo-500"
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}`}
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value={query}
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onChange={(e) => setQuery(e.target.value)}
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placeholder="e.g. $..roles"
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/>
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</div>
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{/* Main CTA */}
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<div className="bg-white shadow rounded-lg p-8 border border-gray-100 text-center">
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<h2 className="text-2xl font-semibold text-gray-900 mb-4">Get Started</h2>
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<p className="text-gray-600 mb-6">
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Start visualising and querying your JSON data with our intuitive JSONPath-based tool.
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</p>
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<Link
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to="/json-viewer"
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className="inline-flex items-center gap-2 px-6 py-3 bg-indigo-600 text-white rounded-lg hover:bg-indigo-700 transition-colours font-medium">
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Open JSON Viewer
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</Link>
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</div>
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{/* Right visualisation panel - 70% */}
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<div className="w-[70%] bg-white rounded-xl shadow-sm border border-slate-200 flex flex-col overflow-hidden min-h-0">
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<div className="bg-slate-50 px-4 py-2 border-b border-slate-200 flex justify-between items-center shrink-0">
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<span className="text-xs font-semibold uppercase tracking-wider text-slate-500">
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Visualised Result
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</span>
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<div className="flex items-center gap-2">
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<span className="text-xs font-medium px-2 py-0.5 bg-indigo-100 text-indigo-700 rounded-full">
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{result.matchedPaths.length} matches
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</span>
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<button
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onClick={copyAsCsv}
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disabled={result.matchedValues.length === 0 || !!result.error}
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className="text-xs font-medium px-3 py-1 bg-emerald-500 text-white rounded-lg hover:bg-emerald-600 disabled:bg-slate-300 disabled:cursor-not-allowed transition-colours"
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>
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{copied ? "Copied!" : "Copy as CSV"}
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</button>
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{/* Features */}
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<div className="grid grid-cols-1 md:grid-cols-3 gap-6">
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<div className="bg-white shadow rounded-lg p-6 border border-gray-100">
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<h3 className="text-lg font-semibold text-gray-900 mb-2">🔍 JSONPath Queries</h3>
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<p className="text-gray-600 text-sm">
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Use powerful JSONPath expressions to query and filter your JSON data structures.
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</p>
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</div>
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<div className="bg-white shadow rounded-lg p-6 border border-gray-100">
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<h3 className="text-lg font-semibold text-gray-900 mb-2">🎨 Visual Highlighting</h3>
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<p className="text-gray-600 text-sm">
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See matching paths highlighted in real-time as you type your queries.
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</p>
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</div>
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<div className="flex-1 p-6 overflow-auto font-mono text-sm leading-relaxed min-h-0">
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{result.error && (
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<div className="bg-red-50 text-red-600 p-4 rounded-lg border border-red-100 text-xs mb-4">
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<strong>Error:</strong> {result.error}
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</div>
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)}
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{result.parsed && (
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<JsonTreeNode
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data={result.parsed}
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path={["$"]}
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matchedPaths={result.matchedPaths}
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/>
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)}
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<div className="bg-white shadow rounded-lg p-6 border border-gray-100">
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<h3 className="text-lg font-semibold text-gray-900 mb-2">🔒 Privacy First</h3>
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<p className="text-gray-600 text-sm">
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All processing happens locally in your browser. No data is ever sent to servers.
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</p>
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</div>
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</div>
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</div>
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@@ -0,0 +1,151 @@
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import { useCallback, useMemo, useState } from "react"
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import jp from "jsonpath"
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import JsonTreeNode from "@/components/json-tree-node"
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/**
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* JSON Viewer page component that displays the JSON Visualiser tool.
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*/
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export default function JsonViewer() {
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const initialData = {
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centre_id: "LON-01",
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location: "London",
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is_active: true,
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staff_members: [
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{ id: 101, name: "Alice", roles: ["Admin", "Manager"] },
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{ id: 102, name: "Bob", roles: ["Developer"] },
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],
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config: {
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colour_scheme: "Dark Mode",
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retention_days: 30,
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},
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}
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const [jsonInput, setJsonInput] = useState<string>(JSON.stringify(initialData, null, 2))
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const [query, setQuery] = useState<string>("$.staff_members[*].name")
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const [copied, setCopied] = useState(false)
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// Compute matching results
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const result = useMemo(() => {
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let parsed
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try {
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parsed = JSON.parse(jsonInput)
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} catch (e) {
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return { parsed: null, matchedPaths: [], matchedValues: [], error: (e as Error).message, queryError: null }
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}
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try {
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const nodes = jp.nodes(parsed, query)
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return {
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parsed,
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matchedPaths: nodes.map((n) => jp.stringify(n.path)),
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matchedValues: nodes.map((n) => n.value),
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error: null,
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queryError: null,
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}
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} catch (e) {
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// When JSONPath expression is invalid, still display the JSON tree but with no matches
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return { parsed, matchedPaths: [], matchedValues: [], error: null, queryError: (e as Error).message }
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}
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}, [jsonInput, query])
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// Copy as CSV
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const copyAsCsv = useCallback(() => {
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if (result.matchedValues.length === 0) return
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const escapeCsvValue = (val: unknown): string => {
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const str = typeof val === "object" ? JSON.stringify(val) : String(val)
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if (str.includes(",") || str.includes('"') || str.includes("\n")) {
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return `"${str.replace(/"/g, '""')}"`
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}
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return str
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}
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const header = query
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const rows = result.matchedValues.map(escapeCsvValue)
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const csv = [header, ...rows].join("\n")
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navigator.clipboard.writeText(csv).then(() => {
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setCopied(true)
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setTimeout(() => setCopied(false), 2000)
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})
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}, [query, result.matchedValues])
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return (
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<div className="h-full flex gap-4 overflow-hidden">
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{/* Left panel - 30% */}
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<div className="w-[30%] flex flex-col gap-4 min-h-0">
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{/* JSON Source - fills remaining height */}
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<div className="bg-white rounded-xl shadow-sm border border-slate-200 overflow-hidden flex-1 flex flex-col min-h-0">
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<div className="bg-slate-50 px-4 py-2 border-b border-slate-200 shrink-0">
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<span className="text-xs font-semibold uppercase tracking-wider text-slate-500">
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JSON Source
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</span>
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</div>
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<textarea
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className="flex-1 w-full p-4 font-mono text-sm outline-none focus:ring-2 focus:ring-indigo-500/20 transition-all resize-none overflow-auto"
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value={jsonInput}
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onChange={(e) => setJsonInput(e.target.value)}
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spellCheck={false}
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/>
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</div>
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{/* JSONPath Expression - fixed height */}
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<div className="bg-white rounded-xl shadow-sm border border-slate-200 p-4 shrink-0">
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<label className="flex items-center gap-2 text-xs font-semibold uppercase tracking-wider mb-2">
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<span className="text-slate-500">JSONPath Expression</span>
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{result.queryError && (
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<span className="text-red-500 normal-case">— Invalid syntax</span>
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)}
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</label>
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<input
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type="text"
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className={`w-full p-3 font-mono text-sm border rounded-lg focus:ring-2 outline-none transition-all shadow-sm ${
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result.queryError
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? "border-red-300 focus:ring-red-500 focus:border-red-500"
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: "border-slate-200 focus:ring-indigo-500 focus:border-indigo-500"
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}`}
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value={query}
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onChange={(e) => setQuery(e.target.value)}
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placeholder="e.g. $..roles"
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/>
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</div>
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</div>
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{/* Right visualisation panel - 70% */}
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<div className="w-[70%] bg-white rounded-xl shadow-sm border border-slate-200 flex flex-col overflow-hidden min-h-0">
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<div className="bg-slate-50 px-4 py-2 border-b border-slate-200 flex justify-between items-center shrink-0">
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<span className="text-xs font-semibold uppercase tracking-wider text-slate-500">
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Visualised Result
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</span>
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<div className="flex items-center gap-2">
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<span className="text-xs font-medium px-2 py-0.5 bg-indigo-100 text-indigo-700 rounded-full">
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{result.matchedPaths.length} matches
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</span>
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<button
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onClick={copyAsCsv}
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disabled={result.matchedValues.length === 0 || !!result.error}
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className="text-xs font-medium px-3 py-1 bg-emerald-500 text-white rounded-lg hover:bg-emerald-600 disabled:bg-slate-300 disabled:cursor-not-allowed transition-colours"
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>
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{copied ? "Copied!" : "Copy as CSV"}
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</button>
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</div>
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</div>
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<div className="flex-1 p-6 overflow-auto font-mono text-sm leading-relaxed min-h-0">
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{result.error && (
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<div className="bg-red-50 text-red-600 p-4 rounded-lg border border-red-100 text-xs mb-4">
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<strong>Error:</strong> {result.error}
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</div>
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)}
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{result.parsed && (
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<JsonTreeNode
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data={result.parsed}
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path={["$"]}
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matchedPaths={result.matchedPaths}
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/>
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)}
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</div>
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</div>
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</div>
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)
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}
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@@ -27,6 +27,10 @@ const router = createBrowserRouter(
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index: true,
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lazy: lazy(() => import("@/page/home")),
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},
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{
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path: "json-viewer",
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lazy: lazy(() => import("@/page/json-viewer")),
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},
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{
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path: "about",
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lazy: lazy(() => import("@/page/about")),
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Reference in New Issue
Block a user