Changed to CTY database

.vscode/settings.json

@@ -1,4 +1,4 @@
 {
 	"vite.autoStart": false,
-	"cSpell.words": ["callsign", "dxcc", "adif", "graphviz", "clublog"]
+	"cSpell.words": ["adif", "callsign", "clublog", "dxcc", "graphviz", "ituz", "timez"]
 }

README.md

@@ -2,10 +2,26 @@
 
 An app for checking the format of a callsign and finding the country it belongs to.
 
-## Obtaining the Clublog prefix database
+## Downloading the country database
+
+Data about countries can be downloaded from either [Amateur Radio Country Files by AD1C](https://www.country-files.com/) or [Clublog](https://clublog.freshdesk.com/support/solutions/articles/54902-downloading-the-prefixes-and-exceptions-as-xml).
+
+### Obtaining the AD1C country database
+
+Download any `cty.dat` file from the [Country Files](https://www.country-files.com/) website. I recommend using the [Big CTY](https://www.country-files.com/big-cty/) file.
+
+Parsing can be done with the script [`cty-dat-parser.ts`](./scripts/cty-dat-parser.ts).
+
+Instead of `cty.dat` you can also use the `cty.csv` file. Parsing can be done with the script [`cty-csv-parser.ts`](./scripts/cty-csv-parser.ts).
+
+`Note:` The `cty.dat` does not contain the `adif` DXCC number.
+
+### Obtaining the Clublog prefix database `OBSOLETE`
 
 Read how to obtain the Clublog prefix file [here](https://clublog.freshdesk.com/support/solutions/articles/54902-downloading-the-prefixes-and-exceptions-as-xml)
 
+Parsing can be done with the script [`clublog-parser.ts`](./scripts/clublog-parser.ts).
+
 ## Deploying the app
 
 The app can be deployed using the following command:

scripts/clublog-parser.ts

@@ -102,7 +102,7 @@ for (const entity of doc.clublog.entities[0].entity) {
 	const end = entity.end?.[0];
 	if (end && new Date(end) < now) continue;
 	entities.push({
-		entity: id,
+		id,
 		name,
 		cqz: cqz ? parseInt(cqz) : undefined,
 		cont: cont ? cont : undefined

scripts/cty-csv-parser.ts

@@ -0,0 +1,150 @@
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+const filePath = process.argv[2];
+if (!filePath) {
+	console.error('Please provide a file path as the first argument');
+	process.exit(1);
+}
+
+const OUT_DIR = '../src/assets/';
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const outDir = path.resolve(__dirname, OUT_DIR);
+console.log('Outputting to', outDir);
+
+import fs from 'fs';
+import { DxccEntity } from '../src/lib/models/dxcc-entity';
+
+// Parse the cty.dat file
+const file = fs.readFileSync(filePath, 'utf8');
+
+const entities: DxccEntity[] = [];
+const prefixes: { call: string; entity: number }[] = [];
+
+console.log('Parsing', filePath);
+
+for (const entity of file.split(';')) {
+	if (!entity.trim()) continue;
+	const [primaryPrefixRaw, name, dxcc, cont, cqz, ituz, lat, long, timez, otherPrefixesRaw] = entity
+		.split(',')
+		.map((s) => s.trim());
+
+	const hasStar = primaryPrefixRaw.startsWith('*');
+	const primaryPrefix = primaryPrefixRaw.replace('*', '');
+	const otherPrefixes = otherPrefixesRaw.split(' ').map((s) => s.trim());
+	const entityId = entities.length + 1;
+
+	entities.push({
+		id: entityId,
+		dxcc: parseInt(dxcc),
+		primaryPrefix,
+		name,
+		cqz: parseInt(cqz),
+		ituz: parseInt(ituz),
+		cont,
+		lat: parseFloat(lat),
+		long: parseFloat(long),
+		timezone: parseFloat(timez)
+	});
+
+	for (const prefix of otherPrefixes) {
+		const find = prefixes.find((p) => p.call === prefix);
+		if (find) {
+			// console.error('Duplicate prefix', prefix, hasStar ? 'Overwriting' : 'Skipping');
+			if (hasStar) find.entity = entityId;
+		} else {
+			prefixes.push({ call: prefix, entity: entityId });
+		}
+	}
+}
+console.log('Parsed', prefixes.length, 'prefixes');
+
+// Build the initial trie
+import { TrieNode } from '../src/lib/models/trie';
+
+const root = new TrieNode();
+for (const { call: callRaw, entity } of prefixes) {
+	const [, call] = callRaw.match(/^=?((?:[A-Z\d/])+)(.*)/)!;
+	const isExact = callRaw.startsWith('=');
+	root.insert(call, entity, isExact);
+}
+
+console.log('Built trie with', root.getAllNodes().size, 'nodes');
+
+// Collapse nodes that do not cause changes
+root.collapseNodes();
+
+console.log('Collapsed trie with', root.getAllNodes().size, 'nodes');
+
+// Merge as many nodes as possible
+const nodes = new Map([...root.getAllNodes()].map((node) => [node.id, node]));
+
+const parents: Map<number, TrieNode[]> = new Map();
+for (const node of nodes.values()) {
+	for (const child of node.children.values()) {
+		const list = parents.get(child.id) ?? [];
+		list.push(node);
+		parents.set(child.id, list);
+	}
+}
+
+let anyChanged = true;
+while (anyChanged) {
+	anyChanged = false;
+
+	const hashed = new Map<string, TrieNode>();
+	for (const node of nodes.values()) {
+		const hash = node.hash();
+		const existing = hashed.get(hash);
+		if (!existing) {
+			hashed.set(hash, node);
+			continue;
+		}
+
+		if (!existing.canMerge(node)) {
+			throw new Error('Merge conflict false positive');
+		}
+
+		for (const parent of parents.get(node.id) ?? []) {
+			for (const [k, v] of parent.children) {
+				if (v === node) {
+					parent.children.set(k, existing);
+				}
+			}
+		}
+		parents.delete(node.id);
+		nodes.delete(node.id);
+		anyChanged = true;
+	}
+}
+console.log('Finished merge with', nodes.size, 'nodes');
+
+// Validate the trie
+for (const { call: callRaw, entity } of prefixes) {
+	const [, call] = callRaw.match(/^=?((?:[A-Z\d/])+)(.*)/)!;
+	let node: TrieNode | null = root;
+	let currentEntity: number | null = null;
+	for (const c of call) {
+		node = node.children.get(c) ?? null;
+		if (!node) break;
+		currentEntity = node.entity ?? currentEntity;
+	}
+	if (currentEntity !== entity && node?.exactEntity !== entity) {
+		console.error('Failed to find', call, entity);
+		console.log('Found', node?.entity, node?.exactEntity, currentEntity);
+	}
+}
+
+// Minimize node IDs
+let i = 0;
+for (const node of root.getAllNodes()) {
+	node.id = i++;
+}
+
+// Output the trie
+const out = root.encodeToString();
+fs.writeFileSync(path.join(outDir, 'dxcc-tree.txt'), out);
+
+// Output the entities
+entities.sort((a, b) => a.id - b.id);
+fs.writeFileSync(path.join(outDir, 'dxcc-entities.json'), JSON.stringify(entities, null, '\t'));

scripts/cty-dat-parser.ts

@@ -0,0 +1,148 @@
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+const filePath = process.argv[2];
+if (!filePath) {
+	console.error('Please provide a file path as the first argument');
+	process.exit(1);
+}
+
+const OUT_DIR = '../src/assets/';
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const outDir = path.resolve(__dirname, OUT_DIR);
+console.log('Outputting to', outDir);
+
+import fs from 'fs';
+import { DxccEntity } from '../src/lib/models/dxcc-entity';
+
+// Parse the cty.dat file
+const file = fs.readFileSync(filePath, 'utf8');
+
+const entities: DxccEntity[] = [];
+const prefixes: { call: string; entity: number }[] = [];
+
+console.log('Parsing', filePath);
+
+for (const entity of file.split(';')) {
+	if (!entity.trim()) continue;
+	const [name, cqz, ituz, cont, lat, long, timez, primaryPrefixRaw, otherPrefixesRaw] = entity
+		.split(':')
+		.map((s) => s.trim());
+
+	const hasStar = primaryPrefixRaw.startsWith('*');
+	const primaryPrefix = primaryPrefixRaw.replace('*', '');
+	const otherPrefixes = otherPrefixesRaw.split(',').map((s) => s.trim());
+	const entityId = entities.length + 1;
+
+	entities.push({
+		id: entityId,
+		primaryPrefix,
+		name,
+		cqz: parseInt(cqz),
+		ituz: parseInt(ituz),
+		cont,
+		lat: parseFloat(lat),
+		long: parseFloat(long),
+		timezone: parseFloat(timez)
+	});
+
+	for (const prefix of otherPrefixes) {
+		const find = prefixes.find((p) => p.call === prefix);
+		if (find) {
+			// console.error('Duplicate prefix', prefix, hasStar ? 'Overwriting' : 'Skipping');
+			if (hasStar) find.entity = entityId;
+		} else {
+			prefixes.push({ call: prefix, entity: entityId });
+		}
+	}
+}
+console.log('Parsed', prefixes.length, 'prefixes');
+
+// Build the initial trie
+import { TrieNode } from '../src/lib/models/trie';
+
+const root = new TrieNode();
+for (const { call: callRaw, entity } of prefixes) {
+	const [, call] = callRaw.match(/^=?((?:[A-Z\d/])+)(.*)/)!;
+	const isExact = callRaw.startsWith('=');
+	root.insert(call, entity, isExact);
+}
+
+console.log('Built trie with', root.getAllNodes().size, 'nodes');
+
+// Collapse nodes that do not cause changes
+root.collapseNodes();
+
+console.log('Collapsed trie with', root.getAllNodes().size, 'nodes');
+
+// Merge as many nodes as possible
+const nodes = new Map([...root.getAllNodes()].map((node) => [node.id, node]));
+
+const parents: Map<number, TrieNode[]> = new Map();
+for (const node of nodes.values()) {
+	for (const child of node.children.values()) {
+		const list = parents.get(child.id) ?? [];
+		list.push(node);
+		parents.set(child.id, list);
+	}
+}
+
+let anyChanged = true;
+while (anyChanged) {
+	anyChanged = false;
+
+	const hashed = new Map<string, TrieNode>();
+	for (const node of nodes.values()) {
+		const hash = node.hash();
+		const existing = hashed.get(hash);
+		if (!existing) {
+			hashed.set(hash, node);
+			continue;
+		}
+
+		if (!existing.canMerge(node)) {
+			throw new Error('Merge conflict false positive');
+		}
+
+		for (const parent of parents.get(node.id) ?? []) {
+			for (const [k, v] of parent.children) {
+				if (v === node) {
+					parent.children.set(k, existing);
+				}
+			}
+		}
+		parents.delete(node.id);
+		nodes.delete(node.id);
+		anyChanged = true;
+	}
+}
+console.log('Finished merge with', nodes.size, 'nodes');
+
+// Validate the trie
+for (const { call: callRaw, entity } of prefixes) {
+	const [, call] = callRaw.match(/^=?((?:[A-Z\d/])+)(.*)/)!;
+	let node: TrieNode | null = root;
+	let currentEntity: number | null = null;
+	for (const c of call) {
+		node = node.children.get(c) ?? null;
+		if (!node) break;
+		currentEntity = node.entity ?? currentEntity;
+	}
+	if (currentEntity !== entity && node?.exactEntity !== entity) {
+		console.error('Failed to find', call, entity);
+		console.log('Found', node?.entity, node?.exactEntity, currentEntity);
+	}
+}
+
+// Minimize node IDs
+let i = 0;
+for (const node of root.getAllNodes()) {
+	node.id = i++;
+}
+
+// Output the trie
+const out = root.encodeToString();
+fs.writeFileSync(path.join(outDir, 'dxcc-tree.txt'), out);
+
+// Output the entities
+fs.writeFileSync(path.join(outDir, 'dxcc-entities.json'), JSON.stringify(entities, null, '\t'));

src/lib/callsign.test.ts

@@ -1,5 +1,10 @@
 import { describe, expect, test } from 'vitest';
 import { parseCallsign } from './callsign';
+import { dxccEntities } from './dxcc-util';
+
+const s5ID = [...dxccEntities.values()].find((e) => e.primaryPrefix === 'S5')?.id;
+const svID = [...dxccEntities.values()].find((e) => e.primaryPrefix === 'SV')?.id;
+const svaID = [...dxccEntities.values()].find((e) => e.primaryPrefix === 'SV/a')?.id;
 
 describe('parseCallsign', () => {
 	test('S52KJ', () => {
@@ -10,8 +15,7 @@ describe('parseCallsign', () => {
 		expect(data?.baseSuffix).toBe('2KJ');
 		expect(data?.base).toBe('S52KJ');
 		expect(data?.secondarySuffix).toBe(null);
-		expect(data?.suffixPartOf).toBe(null);
-		expect(data?.baseDxcc).toBe(499);
+		expect(data?.baseDxcc).toBe(s5ID);
 		expect(data?.prefixDxcc).toBe(null);
 	});
 
@@ -23,8 +27,7 @@ describe('parseCallsign', () => {
 		expect(data?.baseSuffix).toBe('2KJ');
 		expect(data?.base).toBe('S52KJ');
 		expect(data?.secondarySuffix).toBe(null);
-		expect(data?.suffixPartOf).toBe(null);
-		expect(data?.baseDxcc).toBe(499);
+		expect(data?.baseDxcc).toBe(s5ID);
 		expect(data?.prefixDxcc).toBe(null);
 	});
 
@@ -36,35 +39,32 @@ describe('parseCallsign', () => {
 		expect(data?.baseSuffix).toBe('2KJ');
 		expect(data?.base).toBe('S52KJ');
 		expect(data?.secondarySuffix).toBe('P');
-		expect(data?.suffixPartOf).toBe(null);
-		expect(data?.baseDxcc).toBe(499);
+		expect(data?.baseDxcc).toBe(s5ID);
 		expect(data?.prefixDxcc).toBe(null);
 	});
 
-	test('9A/S52KJ', () => {
-		const data = parseCallsign('9A/S52KJ');
+	test('SV/S52KJ', () => {
+		const data = parseCallsign('SV/S52KJ');
 		expect(data).not.toBe(null);
-		expect(data?.secondaryPrefix).toBe('9A');
+		expect(data?.secondaryPrefix).toBe('SV');
 		expect(data?.basePrefix).toBe('S5');
 		expect(data?.baseSuffix).toBe('2KJ');
 		expect(data?.base).toBe('S52KJ');
 		expect(data?.secondarySuffix).toBe(null);
-		expect(data?.suffixPartOf).toBe(null);
-		expect(data?.baseDxcc).toBe(499);
-		expect(data?.prefixDxcc).toBe(497);
+		expect(data?.baseDxcc).toBe(s5ID);
+		expect(data?.prefixDxcc).toBe(svID);
 	});
 
-	test('9A/S52KJ/P', () => {
-		const data = parseCallsign('9A/S52KJ/P');
+	test('SV/S52KJ/P', () => {
+		const data = parseCallsign('SV/S52KJ/P');
 		expect(data).not.toBe(null);
-		expect(data?.secondaryPrefix).toBe('9A');
+		expect(data?.secondaryPrefix).toBe('SV');
 		expect(data?.basePrefix).toBe('S5');
 		expect(data?.baseSuffix).toBe('2KJ');
 		expect(data?.base).toBe('S52KJ');
 		expect(data?.secondarySuffix).toBe('P');
-		expect(data?.suffixPartOf).toBe(null);
-		expect(data?.baseDxcc).toBe(499);
-		expect(data?.prefixDxcc).toBe(497);
+		expect(data?.baseDxcc).toBe(s5ID);
+		expect(data?.prefixDxcc).toBe(svID);
 	});
 
 	test('S52KJ/A', () => {
@@ -75,21 +75,19 @@ describe('parseCallsign', () => {
 		expect(data?.baseSuffix).toBe('2KJ');
 		expect(data?.base).toBe('S52KJ');
 		expect(data?.secondarySuffix).toBe('A');
-		expect(data?.suffixPartOf).toBe(null);
-		expect(data?.baseDxcc).toBe(499);
+		expect(data?.baseDxcc).toBe(s5ID);
 		expect(data?.prefixDxcc).toBe(null);
 	});
 
-	test('SV1KJ/A', () => {
-		const data = parseCallsign('SV1KJ/A');
+	test('SV2RSG/A', () => {
+		const data = parseCallsign('SV2RSG/A');
 		expect(data).not.toBe(null);
 		expect(data?.secondaryPrefix).toBe(null);
-		expect(data?.basePrefix).toBe('SV');
-		expect(data?.baseSuffix).toBe('1KJ');
-		expect(data?.base).toBe('SV1KJ');
+		expect(data?.basePrefix).toBe('SV2RSG/A');
+		expect(data?.baseSuffix).toBe('');
+		expect(data?.base).toBe('SV2RSG');
 		expect(data?.secondarySuffix).toBe('A');
-		expect(data?.suffixPartOf).toBe('base');
-		expect(data?.baseDxcc).toBe(180);
+		expect(data?.baseDxcc).toBe(svaID);
 		expect(data?.prefixDxcc).toBe(null);
 	});
 
@@ -101,8 +99,7 @@ describe('parseCallsign', () => {
 		expect(data?.baseSuffix).toBe('2KJ');
 		expect(data?.base).toBe('S52KJ');
 		expect(data?.secondarySuffix).toBe('A');
-		expect(data?.suffixPartOf).toBe('prefix');
-		expect(data?.baseDxcc).toBe(499);
-		expect(data?.prefixDxcc).toBe(180);
+		expect(data?.baseDxcc).toBe(s5ID);
+		expect(data?.prefixDxcc).toBe(svID);
 	});
 });

src/lib/callsign.ts

@@ -8,8 +8,6 @@ type CallsignData = {
 	baseSuffix: string | null;
 	base: string;
 	secondarySuffix: string | null;
-	suffixPartOf: 'base' | 'prefix' | null;
-	suffixDescription?: string;
 	baseDxcc: number | null;
 	prefixDxcc: number | null;
 };
@@ -24,17 +22,13 @@ export function parseCallsign(callsign: string): CallsignData | null {
 	const secondaryPrefix = match[1]?.slice(0, -1) ?? null;
 	const base = match[2];
 	const secondarySuffix = match[3]?.slice(1) ?? null;
-	const baseDxcc = findDxcc(base + '/' + secondarySuffix);
+
+	const baseWithSuffix = base + (secondarySuffix ? '/' + secondarySuffix : '');
+	const baseDxcc = findDxcc(baseWithSuffix);
 	const prefixDxcc = secondaryPrefix ? findDxcc(callsign) : null;
 
-	const basePrefix = baseDxcc ? base.slice(0, baseDxcc.prefixLength) : null;
-	const baseSuffix = baseDxcc ? base.slice(baseDxcc.prefixLength) : null;
-
-	const suffixPartOf = prefixDxcc?.withSuffix
-		? 'prefix'
-		: !prefixDxcc && baseDxcc?.withSuffix
-			? 'base'
-			: null;
+	const basePrefix = baseDxcc ? baseWithSuffix.slice(0, baseDxcc.matchLength) : null;
+	const baseSuffix = baseDxcc ? baseWithSuffix.slice(baseDxcc.matchLength).split('/')[0] : null;
 
 	return {
 		secondaryPrefix,
@@ -42,26 +36,13 @@ export function parseCallsign(callsign: string): CallsignData | null {
 		baseSuffix,
 		base,
 		secondarySuffix,
-		suffixPartOf,
-		baseDxcc: baseDxcc?.entity || null,
-		prefixDxcc: prefixDxcc?.entity || null
+		baseDxcc: baseDxcc?.entityId || null,
+		prefixDxcc: prefixDxcc?.entityId || null
 	};
 }
 
-export function getSecondarySuffixDescription(callsign: CallsignData): string | null {
-	if (!callsign.secondarySuffix) {
-		return null;
-	}
-
-	if (callsign.suffixPartOf === 'base') {
-		return 'Part of prefix';
-	}
-
-	if (callsign.suffixPartOf === 'prefix') {
-		return 'Part of secondary prefix';
-	}
-
-	switch (callsign.secondarySuffix) {
+export function getSecondarySuffixDescription(suffix: string): string | null {
+	switch (suffix) {
 		case 'P':
 			return 'Portable';
 		case 'M':
@@ -70,6 +51,7 @@ export function getSecondarySuffixDescription(callsign: CallsignData): string |
 			return 'Aeronautical mobile';
 		case 'MM':
 			return 'Maritime mobile';
+		default:
+			return null;
 	}
-	return null;
 }

src/lib/dxcc-util.test.ts

@@ -8,81 +8,86 @@ describe('dxccTree', () => {
 });
 
 describe('findDxcc', () => {
+	const s5ID = [...dxccEntities.values()].find((e) => e.primaryPrefix === 'S5')?.id;
+	const svID = [...dxccEntities.values()].find((e) => e.primaryPrefix === 'SV')?.id;
+	const svaID = [...dxccEntities.values()].find((e) => e.primaryPrefix === 'SV/a')?.id;
+	const sv9ID = [...dxccEntities.values()].find((e) => e.primaryPrefix === 'SV9')?.id;
+
 	test('S52KJ', () => {
 		const result = findDxcc('S52KJ');
-		expect(result?.entity).toBe(499);
-		expect(result?.prefixLength).toBe(2);
-		expect(result?.withSuffix).toBe(false);
+		expect(result?.entityId).toBe(s5ID);
+		expect(result?.matchLength).toBe(2);
+		expect(result?.isExact).toBe(false);
 	});
 
 	test('s52kj', () => {
 		const result = findDxcc('s52kj');
-		expect(result?.entity).toBe(499);
-		expect(result?.prefixLength).toBe(2);
-		expect(result?.withSuffix).toBe(false);
+		expect(result?.entityId).toBe(s5ID);
+		expect(result?.matchLength).toBe(2);
+		expect(result?.isExact).toBe(false);
 	});
 
 	test('S52KJ/P', () => {
 		const result = findDxcc('S52KJ/P');
-		expect(result?.entity).toBe(499);
-		expect(result?.prefixLength).toBe(2);
-		expect(result?.withSuffix).toBe(false);
+		expect(result?.entityId).toBe(s5ID);
+		expect(result?.matchLength).toBe(2);
+		expect(result?.isExact).toBe(false);
 	});
 
 	test('SV2AAA', () => {
 		const result = findDxcc('SV2AAA');
-		expect(result?.entity).toBe(236);
-		expect(result?.prefixLength).toBe(2);
-		expect(result?.withSuffix).toBe(false);
+		expect(result?.entityId).toBe(svID);
+		expect(result?.matchLength).toBe(2);
+		expect(result?.isExact).toBe(false);
 	});
 
-	test('SV2AAA/A', () => {
-		const result = findDxcc('SV2AAA/A');
-		expect(result?.entity).toBe(180);
-		expect(result?.prefixLength).toBe(2);
-		expect(result?.withSuffix).toBe(true);
+	test('SV2RSG/A', () => {
+		const result = findDxcc('SV2RSG/A');
+		expect(result?.entityId).toBe(svaID);
+		expect(result?.matchLength).toBe(8);
+		expect(result?.isExact).toBe(true);
 	});
 
 	test('SV2AAA/AP', () => {
 		const result = findDxcc('SV2AAA/AP');
-		expect(result?.entity).toBe(236);
-		expect(result?.prefixLength).toBe(2);
-		expect(result?.withSuffix).toBe(false);
+		expect(result?.entityId).toBe(svID);
+		expect(result?.matchLength).toBe(2);
+		expect(result?.isExact).toBe(false);
 	});
 
 	test('SV2AAA/P', () => {
 		const result = findDxcc('SV2AAA/P');
-		expect(result?.entity).toBe(236);
-		expect(result?.prefixLength).toBe(2);
-		expect(result?.withSuffix).toBe(false);
+		expect(result?.entityId).toBe(svID);
+		expect(result?.matchLength).toBe(2);
+		expect(result?.isExact).toBe(false);
 	});
 
 	test('SV/S52KJ', () => {
 		const result = findDxcc('SV/S52KJ');
-		expect(result?.entity).toBe(236);
-		expect(result?.prefixLength).toBe(2);
-		expect(result?.withSuffix).toBe(false);
+		expect(result?.entityId).toBe(svID);
+		expect(result?.matchLength).toBe(2);
+		expect(result?.isExact).toBe(false);
 	});
 
 	test('SV/S52KJ/A', () => {
 		const result = findDxcc('SV/S52KJ/A');
-		expect(result?.entity).toBe(180);
-		expect(result?.prefixLength).toBe(2);
-		expect(result?.withSuffix).toBe(true);
+		expect(result?.entityId).toBe(svID);
+		expect(result?.matchLength).toBe(2);
+		expect(result?.isExact).toBe(false);
 	});
 
 	test('SV/S52KJ/P', () => {
 		const result = findDxcc('SV/S52KJ/P');
-		expect(result?.entity).toBe(236);
-		expect(result?.prefixLength).toBe(2);
-		expect(result?.withSuffix).toBe(false);
+		expect(result?.entityId).toBe(svID);
+		expect(result?.matchLength).toBe(2);
+		expect(result?.isExact).toBe(false);
 	});
 
 	test('SV9/S52KJ/A', () => {
 		const result = findDxcc('SV9/S52KJ/A');
-		expect(result?.entity).toBe(40);
-		expect(result?.prefixLength).toBe(3);
-		expect(result?.withSuffix).toBe(false);
+		expect(result?.entityId).toBe(sv9ID);
+		expect(result?.matchLength).toBe(3);
+		expect(result?.isExact).toBe(false);
 	});
 
 	test('empty string', () => {
@@ -106,8 +111,10 @@ describe('dxccEntities', () => {
 		expect(dxccEntities).not.toBe(null);
 	});
 
-	test('499', () => {
-		const entity = dxccEntities.get(499);
+	test('S5', () => {
+		const s5Id = [...dxccEntities.values()].find((e) => e.primaryPrefix === 'S5')!.id;
+
+		const entity = dxccEntities.get(s5Id);
 		expect(entity).not.toBe(undefined);
 		expect(entity?.name).toBe('Slovenia');
 		expect(entity?.cont).toBe('EU');

src/lib/dxcc-util.ts

@@ -1,43 +1,50 @@
 import dxccTreeFile from '../assets/dxcc-tree.txt?raw';
 import dxccEntitiesFile from '../assets/dxcc-entities.json';
 import { TrieNode } from './models/trie';
+import type { DxccEntity } from './models/dxcc-entity';
 
 export const dxccTree = TrieNode.decodeFromString(dxccTreeFile);
 
 interface DxccResult {
-	entity: number;
-	prefixLength: number;
-	withSuffix: boolean;
+	entityId: number;
+	matchLength: number;
+	isExact: boolean;
 }
 
 export function findDxcc(prefix: string, startingNode: TrieNode = dxccTree): DxccResult | null {
 	prefix = prefix.toUpperCase();
 	let node = startingNode;
-	let entity: number | null = null;
-	let prefixLength = 0;
+	let entityId: number | null = null;
+	let tempPrefixLength = 0;
+	let matchLength = 0;
 
 	while (prefix) {
 		const next = node.children.get(prefix[0]);
-
-		if (prefix[0] === '/' || !next) {
-			const slashPos = prefix.lastIndexOf('/');
-			if (node.children.has('/') && slashPos > 0) {
-				const suffix = prefix.slice(slashPos + 1);
-				const res = findDxcc(suffix, node.children.get('/'));
-				if (res && res.prefixLength == suffix.length)
-					return { entity: res.entity, prefixLength, withSuffix: true };
-			}
+		if (!next) {
 			break;
 		}
 
 		node = next;
-		if (node.entity) entity = node.entity;
 		prefix = prefix.slice(1);
-		prefixLength++;
+		tempPrefixLength++;
+		if (node.entity) {
+			entityId = node.entity;
+			matchLength = tempPrefixLength;
+		}
 	}
 
-	if (!entity) return null;
-	return { entity, withSuffix: false, prefixLength };
+	if (node.exactEntity && !prefix) {
+		return {
+			entityId: node.exactEntity,
+			matchLength: tempPrefixLength,
+			isExact: true
+		};
+	}
+
+	if (!entityId) return null;
+	return { entityId, matchLength, isExact: false };
 }
 
-export const dxccEntities = new Map([...dxccEntitiesFile].map((e) => [e.entity, e]));
+export const dxccEntities: Map<number, DxccEntity> = new Map(
+	[...dxccEntitiesFile].map((e) => [e.id, e])
+);

src/lib/models/dxcc-entity.ts

@@ -1,10 +1,14 @@
 export type DxccEntity = {
-	entity: number;
+	id: number;
+	dxcc?: number;
+	primaryPrefix?: string;
 	name: string;
 	cqz?: number;
+	ituz?: number;
 	cont?: string;
 	long?: number;
 	lat?: number;
+	timezone?: number;
 	start?: string;
 	end?: string;
 };

src/lib/models/trie.test.ts

@@ -4,10 +4,14 @@ import { TrieNode } from './trie';
 describe('parseString', () => {
 	test('Basic test', () => {
 		const encoded = `
-            31-YAP-4
-            3=401
-            31-X-3
-            4=400
+            31
+			-YAP-4
+            -X-3
+            3
+			=401
+            4
+			=400
+			!404
         `;
 
 		const root = TrieNode.decodeFromString(encoded);
@@ -29,6 +33,7 @@ describe('parseString', () => {
 
 		expect(y!.id).toBe(4);
 		expect(y!.entity).toBe(400);
+		expect(y!.exactEntity).toBe(404);
 		expect(y!.children.size).toBe(0);
 
 		const x = root.children.get('X');

src/lib/models/trie.ts

@@ -2,24 +2,42 @@ let nodeCounter = 0;
 
 export class TrieNode {
 	public id: number;
+	public entity: number | null;
+	public exactEntity: number | null;
+	public children: Map<string, TrieNode>;
 
-	constructor(
-		public children: Map<string, TrieNode> = new Map(),
-		public entity: number | null = null,
-		id: number | null = null
-	) {
+	constructor({
+		id,
+		entity,
+		exactEntity,
+		children
+	}: {
+		id?: number | null;
+		entity?: number | null;
+		exactEntity?: number | null;
+		children?: Map<string, TrieNode>;
+	} = {}) {
 		if (id) this.id = id;
 		else this.id = ++nodeCounter;
+		this.entity = entity ?? null;
+		this.exactEntity = exactEntity ?? null;
+		this.children = children ?? new Map();
 	}
 
 	/**
 	 * Insert a prefix into the trie.
 	 */
-	insert(prefix: string, entity: number): void {
+	insert(prefix: string, entity: number, isExact: boolean = false): void {
 		if (!prefix) {
-			if (this.entity && this.entity !== entity)
-				throw new Error(`Prefix conflict: ${this.entity} vs ${entity}`);
-			this.entity = entity;
+			if (isExact) {
+				if (this.exactEntity && this.exactEntity !== entity)
+					throw new Error(`Exact prefix conflict: ${this.exactEntity} vs ${entity}`);
+				this.exactEntity = entity;
+			} else {
+				if (this.entity && this.entity !== entity)
+					throw new Error(`Prefix conflict: ${this.entity} vs ${entity}`);
+				this.entity = entity;
+			}
 			return;
 		}
 		let next = this.children.get(prefix[0]);
@@ -27,7 +45,7 @@ export class TrieNode {
 			next = new TrieNode();
 			this.children.set(prefix[0], next);
 		}
-		next.insert(prefix.slice(1), entity);
+		next.insert(prefix.slice(1), entity, isExact);
 	}
 
 	/**
@@ -50,11 +68,40 @@ export class TrieNode {
 		return new Set(nodes);
 	}
 
+	/**
+	 * Collapse nodes that do not cause changes.
+	 * Returns true if node can be deleted, false otherwise.
+	 */
+	collapseNodes(currentEntity: number | null = null): boolean {
+		for (const [k, child] of this.children.entries()) {
+			if (child.collapseNodes(this.entity ?? currentEntity)) {
+				this.children.delete(k);
+			}
+		}
+		return (
+			this.children.size == 0 &&
+			(!this.entity || this.entity === currentEntity) &&
+			(!this.exactEntity || this.exactEntity === currentEntity)
+		);
+	}
+
+	/**
+	 * Generate a hash for merging nodes.
+	 */
+	hash(): string {
+		const children = [...this.children.entries()]
+			.map(([k, v]) => `${k}:${v.id}`)
+			.sort()
+			.join(',');
+		return `${this.entity ?? ''}_${this.exactEntity ?? ''}_${children}`;
+	}
+
 	/**
 	 * Checks if this node can be merged with another node.
 	 */
 	canMerge(other: TrieNode): boolean {
 		if (this === other) return false;
+		if (this.exactEntity !== other.exactEntity) return false;
 		if (this.entity !== other.entity) return false;
 		// Union set of all children keys
 		const l = new Set([...this.children.keys(), ...other.children.keys()]);
@@ -74,9 +121,12 @@ export class TrieNode {
 	}
 
 	_encodeToString(): string {
-		const s = [];
+		const s = [`${this.id}`];
 		if (this.entity) {
-			s.push(`${this.id}=${this.entity}`);
+			s.push(`=${this.entity}`);
+		}
+		if (this.exactEntity) {
+			s.push(`!${this.exactEntity}`);
 		}
 		for (const c of new Set(this.children.values())) {
 			const chars = [];
@@ -84,7 +134,7 @@ export class TrieNode {
 				if (v === c) chars.push(k);
 			}
 			chars.sort();
-			s.push(`${this.id}-${chars.join('')}-${c.id}`);
+			s.push(`-${chars.join('')}-${c.id}`);
 		}
 		return s.join('\n');
 	}
@@ -98,7 +148,7 @@ export class TrieNode {
 		function getNode(id: number): TrieNode {
 			let node = nodes.get(id);
 			if (!node) {
-				node = new TrieNode(undefined, undefined, id);
+				node = new TrieNode({ id });
 				nodes.set(id, node);
 				// Assert root is the first node
 				root ??= node;
@@ -106,21 +156,24 @@ export class TrieNode {
 			return node;
 		}
 
+		let currentNode: TrieNode | null = null;
 		for (let line of s.trim().split('\n')) {
 			line = line.trim();
 			if (!line) continue;
-			const parts = line.split('=');
-			if (parts.length === 2) {
-				const [id, entity] = parts;
-				const node = getNode(parseInt(id));
-				node.entity = parseInt(entity);
-			} else {
-				const [id, chars, child] = line.split('-');
-				const parent = getNode(parseInt(id));
+			if (line.startsWith('=')) {
+				const entity = line.slice(1);
+				currentNode!.entity = parseInt(entity);
+			} else if (line.includes('!')) {
+				const entity = line.slice(1);
+				currentNode!.exactEntity = parseInt(entity);
+			} else if (line.startsWith('-')) {
+				const [, chars, child] = line.split('-');
 				const childNode = getNode(parseInt(child));
 				for (const char of chars) {
-					parent.children.set(char, childNode);
+					currentNode!.children.set(char, childNode);
 				}
+			} else {
+				currentNode = getNode(parseInt(line));
 			}
 		}
 

src/routes/+layout.svelte

@@ -17,10 +17,10 @@
 	<footer class="bg-[#444] py-3">
 		<div class="c flex justify-between gap-4">
 			<div>
-				By <a href="https://jkob.cc">S52KJ</a>
+				Website by <a href="https://jkob.cc/">S52KJ</a>
 			</div>
 			<div>
-				Data from <a href="https://clublog.org">ClubLog</a>
+				Data by <a href="https://www.country-files.com/">AD1C</a>
 			</div>
 			<div>
 				Source code on <a href="https://github.com/jakobkordez/call-tester">GitHub</a>

src/routes/+page.svelte

@@ -1,29 +1,42 @@
 <script lang="ts">
+	import { goto } from '$app/navigation';
+	import { page } from '$app/stores';
 	import { getSecondarySuffixDescription, parseCallsign } from '$lib/callsign';
 	import { dxccEntities, findDxcc } from '$lib/dxcc-util';
 	import CallsignInput from '../components/callsign-input.svelte';
 
-	let callsign = '9a/s52kj/p';
+	let query = new URLSearchParams($page.url.searchParams.toString());
+
+	let callsign = query.get('c') ?? '';
 
 	$: callsignData = parseCallsign(callsign);
 	$: rawDxcc = findDxcc(callsign);
 
-	$: suffixPartOf = [null, 'base', 'prefix'].indexOf(callsignData?.suffixPartOf ?? null);
+	$: updateUrl(callsign);
+
+	function updateUrl(callsign: string) {
+		if (!callsign) goto('.', { keepFocus: true });
+		else goto(`?c=${callsign}`, { keepFocus: true });
+	}
 
 	function styleText(): string {
-		const baseClass = 'text-red-400';
+		const baseClass = 'text-cyan-300';
 		const prefixClass = 'text-blue-400';
+		const suffixClass = 'text-green-400';
 
 		if (!callsignData) {
 			const dxcc = findDxcc(callsign);
 			if (!dxcc) return callsign;
-			return `<span class="${baseClass}">${callsign.slice(0, dxcc.prefixLength)}</span>${callsign.slice(dxcc.prefixLength)}`;
+			return `<span class="text-cyan-300">${callsign.slice(0, dxcc.matchLength)}</span>${callsign.slice(dxcc.matchLength)}`;
+		}
+
+		if (rawDxcc?.isExact) {
+			return `<span class="text-amber-400">${callsign}</span>`;
 		}
 
 		const { base, basePrefix, baseSuffix, secondaryPrefix, secondarySuffix } = callsignData;
 
 		// TODO Check if base and prefix same dxcc
-		const suffixClass = ['text-green-400', baseClass, prefixClass][suffixPartOf];
 		return [
 			secondaryPrefix ? `<span class="${prefixClass}">${secondaryPrefix}/</span>` : '',
 			basePrefix ? `<span class="${baseClass}">${basePrefix}</span>${baseSuffix}` : base,
@@ -40,7 +53,13 @@
 		<CallsignInput bind:inputText={callsign} generateStyledText={styleText} />
 	</div>
 
-	{#if callsignData}
+	{#if rawDxcc?.isExact}
+		<div class="data-box full">
+			<h2>Full match</h2>
+			<div class="font-mono text-2xl font-medium">{callsign}</div>
+			<div>{dxccEntities.get(rawDxcc.entityId)?.name ?? '?'}</div>
+		</div>
+	{:else if callsignData}
 		<div class="flex flex-col gap-4 md:flex-row">
 			{#if callsignData.prefixDxcc}
 				<div class="data-box prefix">
@@ -57,34 +76,37 @@
 				</div>
 			{/if}
 			{#if callsignData.secondarySuffix}
-				<div class={`data-box ${['suffix', 'base', 'prefix'][suffixPartOf]}`}>
+				<div class="data-box suffix">
 					<h2>Secondary suffix</h2>
 					<div class="font-mono text-2xl font-medium">{callsignData.secondarySuffix}</div>
-					<div>{getSecondarySuffixDescription(callsignData) ?? ''}</div>
+					<div>{getSecondarySuffixDescription(callsignData.secondarySuffix) ?? ''}</div>
 				</div>
 			{/if}
 		</div>
 	{:else if rawDxcc}
 		<div class="data-box base">
 			<h2>Prefix</h2>
-			<div class="font-mono text-2xl font-medium">{callsign.slice(0, rawDxcc.prefixLength)}</div>
-			<div>{dxccEntities.get(rawDxcc.entity)?.name ?? '?'}</div>
+			<div class="font-mono text-2xl font-medium">{callsign.slice(0, rawDxcc.matchLength)}</div>
+			<div>{dxccEntities.get(rawDxcc.entityId)?.name ?? '?'}</div>
 		</div>
 	{/if}
 </div>
 
 <style lang="postcss">
 	.data-box {
-		@apply flex-1 rounded-xl p-4 text-center;
+		@apply mx-auto w-full max-w-[50%] flex-1 rounded-xl p-4 text-center;
 	}
 	.data-box > h2 {
 		@apply text-sm;
 	}
+	.data-box.full {
+		@apply bg-amber-600/40;
+	}
 	.data-box.prefix {
 		@apply bg-blue-600/40;
 	}
 	.data-box.base {
-		@apply bg-red-600/40;
+		@apply bg-cyan-600/40;
 	}
 	.data-box.suffix {
 		@apply bg-green-600/40;