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/**
* Service for interacting with the tkconv API
*/
export class ApiService {
/**
* Fetches JSON data from the API
* @param path The API path to fetch
* @param options Additional fetch options
* @returns Parsed JSON data
* @throws Error if the request fails or returns HTML
*/
async fetchJson<T>(path: string, options: RequestInit = {}): Promise<T> {
try {
// Ensure the path starts with a slash
const normalizedPath = path.startsWith('/') ? path : `/${path}`;
// Set default headers if not provided
const headers = {
'User-Agent': 'Mozilla/5.0 (compatible; OpenTK-MCP/1.0)',
...options.headers
};
const res = await fetch(`${BASE_URL}${normalizedPath}`, {
...options,
headers
});
Iif (!res.ok) {
throw new Error(`API error: ${res.status} ${res.statusText}`);
}
const text = await res.text();
// Check if the response is HTML
Iif (text.trim().startsWith('<!DOCTYPE')) {
console.error(`The API returned HTML instead of JSON for path: ${normalizedPath}`);
return {} as T;
}
// Parse JSON
try {
return JSON.parse(text) as T;
} catch (error) {
console.error(`Failed to parse JSON for path: ${normalizedPath}`, error);
return {} as T;
}
} catch (error) {
console.error(`Error fetching JSON: ${(error as Error).message}`);
throw error;
}
}
/**
* Fetches HTML content from the API
* @param path The API path to fetch
* @param options Additional fetch options
* @returns HTML content as string
* @throws Error if the request fails
*/
async fetchHtml(path: string, options: RequestInit = {}): Promise<string> {
try {
// Ensure the path starts with a slash
const normalizedPath = path.startsWith('/') ? path : `/${path}`;
// Set default headers if not provided
const headers = {
'User-Agent': 'Mozilla/5.0 (compatible; OpenTK-MCP/1.0)',
...options.headers
};
const res = await fetch(`${BASE_URL}${normalizedPath}`, {
...options,
headers
});
if (!res.ok) {
throw new Error(`API error: ${res.status} ${res.statusText}`);
}
return await res.text();
} catch (error) {
console.error(`Error fetching HTML: ${(error as Error).message}`);
throw error;
}
}
/**
* Fetches binary data from the API
* @param path The API path to fetch
* @param options Additional fetch options
* @returns Binary data as ArrayBuffer and content type
* @throws Error if the request fails
*/
async fetchBinary(path: string, options: RequestInit = {}): Promise<{ data: ArrayBuffer, contentType: string }> {
try {
// Ensure the path starts with a slash
const normalizedPath = path.startsWith('/') ? path : `/${path}`;
// Set default headers if not provided
const headers = {
'User-Agent': 'Mozilla/5.0 (compatible; OpenTK-MCP/1.0)',
...options.headers
};
const res = await fetch(`${BASE_URL}${normalizedPath}`, {
...options,
headers
});
Iif (!res.ok) {
throw new Error(`API error: ${res.status} ${res.statusText}`);
}
const data = await res.arrayBuffer();
const contentType = res.headers.get('content-type') || 'application/octet-stream';
return { data, contentType };
} catch (error) {
console.error(`Error fetching binary data: ${(error as Error).message}`);
throw error;
}
}
/**
* Searches for documents in the tkconv API
* @param query The search query
* @param options Additional options like twomonths flag
* @returns Search results
* @throws Error if the request fails or returns HTML
*/
async search<T>(query: string, options: { twomonths?: boolean, soorten?: string } = {}): Promise<T> {
try {
// Don't sanitize quotes as they're important for exact phrase searches
// Only sanitize backslashes which could cause issues
const sanitizedQuery = query.replace(/[\\]/g, ' ').trim();
// Create a simple string for the form data (the API expects application/x-www-form-urlencoded)
const formData = `q=${encodeURIComponent(sanitizedQuery)}&twomonths=${options.twomonths ? "true" : "false"}&soorten=${options.soorten || ""}`;
const res = await fetch(`${BASE_URL}/search`, {
method: "POST",
headers: {
'Accept': '*/*',
'Content-Type': 'application/x-www-form-urlencoded',
'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36',
'Referer': `${BASE_URL}/search.html?q=${encodeURIComponent(sanitizedQuery)}&twomonths=${options.twomonths ? "true" : "false"}&soorten=${options.soorten || "alles"}`,
'Origin': BASE_URL,
'Host': 'berthub.eu',
'Connection': 'keep-alive',
'Sec-Fetch-Dest': 'empty',
'Sec-Fetch-Mode': 'cors',
'Sec-Fetch-Site': 'same-origin',
'sec-ch-ua': '"Chromium";v="135", "Not-A.Brand";v="8"',
'sec-ch-ua-mobile': '?0',
'sec-ch-ua-platform': '"macOS"'
},
body: formData,
// We would add timeout here, but it's not supported in the RequestInit type
});
if (!res.ok) {
// If we get a 500 error, try to use a simplified query instead
if (res.status === 500) {
console.error(`Search API returned 500 for query: ${sanitizedQuery}`);
// Try to simplify the query by taking just the first term
const simplifiedQuery = sanitizedQuery.split(/\s+/)[0];
if (simplifiedQuery && simplifiedQuery !== sanitizedQuery) {
console.log(`Retrying with simplified query: ${simplifiedQuery}`);
// Create a simple string for the form data with the simplified query
const simplifiedForm = `q=${encodeURIComponent(simplifiedQuery)}&twomonths=${options.twomonths ? "true" : "false"}&soorten=${options.soorten || ""}`;
const retryRes = await fetch(`${BASE_URL}/search`, {
method: "POST",
headers: {
'Accept': '*/*',
'Content-Type': 'application/x-www-form-urlencoded',
'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36',
'Referer': `${BASE_URL}/search.html?q=${encodeURIComponent(simplifiedQuery)}&twomonths=${options.twomonths ? "true" : "false"}&soorten=${options.soorten || "alles"}`,
'Origin': BASE_URL,
'Host': 'berthub.eu',
'Connection': 'keep-alive',
'Sec-Fetch-Dest': 'empty',
'Sec-Fetch-Mode': 'cors',
'Sec-Fetch-Site': 'same-origin',
'sec-ch-ua': '"Chromium";v="135", "Not-A.Brand";v="8"',
'sec-ch-ua-mobile': '?0',
'sec-ch-ua-platform': '"macOS"'
},
body: simplifiedForm
});
Iif (retryRes.ok) {
const retryText = await retryRes.text();
try {
const retryData = JSON.parse(retryText);
return retryData as T;
} catch (e) {
// If parsing fails, fall back to empty results
}
}
}
// If retry failed or wasn't attempted, return empty results with a message
return {
results: [],
error: `The search query '${sanitizedQuery}' caused an error in the search API. Try simplifying your query.`
} as T;
}
throw new Error(`API error: ${res.status} ${res.statusText}`);
}
// Check if the response is HTML
const text = await res.text();
Iif (text.trim().startsWith('<!DOCTYPE')) {
console.error(`The search API returned HTML instead of JSON for query: ${sanitizedQuery}`);
return { results: [] } as T;
}
// Parse JSON
try {
return JSON.parse(text) as T;
} catch (error) {
console.error(`Failed to parse JSON for query: ${sanitizedQuery}`, error);
return { results: [] } as T;
}
} catch (error) {
console.error(`Unexpected error in search: ${(error as Error).message}`);
throw error;
}
}
/**
* Resolves an external reference to a URL
* @param extId The external ID to resolve
* @returns The resolved URL or empty string if not found
*/
async resolveExternal(extId: string): Promise<string> {
try {
// Sanitize the external ID
const sanitizedExtId = extId.replace(/[\s]+/g, ' ').trim();
// First try the direct approach with the /op/ endpoint
try {
const res = await fetch(`${BASE_URL}/op/${encodeURIComponent(sanitizedExtId)}`, {
redirect: "manual",
headers: {
'User-Agent': 'Mozilla/5.0 (compatible; OpenTK-MCP/1.0)'
}
});
// Even if the response is not OK, we still want to check for a location header
const location = res.headers.get("location") || "";
// If we didn't get a location header but the response was OK, try to extract from body
Iif (!location && res.ok) {
const text = await res.text();
// Look for a redirect URL in the response body (simple heuristic)
const match = text.match(/window\.location\s*=\s*['"]([^'"]+)['"]/);
Iif (match && match[1]) {
return match[1];
}
}
Iif (location) {
return location;
}
} catch (directError) {
console.log(`Direct external reference resolution failed: ${(directError as Error).message}`);
}
// If the direct approach failed, try to get the document page and extract the link
try {
const html = await this.fetchHtml(`/document.html?nummer=${encodeURIComponent(sanitizedExtId)}`);
// Look for the link to the Tweede Kamer site
const tkLinkMatch = html.match(/href="(https:\/\/www\.tweedekamer\.nl\/kamerstukken\/[^"]+)"/);
if (tkLinkMatch && tkLinkMatch[1]) {
return tkLinkMatch[1];
}
// If we couldn't find a TK link, look for any external link
const anyLinkMatch = html.match(/href="(https?:\/\/[^"]+)"/);
Iif (anyLinkMatch && anyLinkMatch[1]) {
return anyLinkMatch[1];
}
} catch (htmlError) {
console.log(`HTML approach for external reference failed: ${(htmlError as Error).message}`);
}
// If all else fails, construct a link to the document page
return `${BASE_URL}/document.html?nummer=${encodeURIComponent(sanitizedExtId)}`;
} catch (error) {
console.error(`Error resolving external reference: ${(error as Error).message}`);
// Return a fallback URL to the document page
return `${BASE_URL}/document.html?nummer=${encodeURIComponent(extId)}`;
}
}
/**
* Fetches a sitemap of URLs for a specific time period
* @param path The sitemap path (e.g., sitemap-2025.txt)
* @returns Array of URLs
*/
async fetchSitemap(path: string): Promise<string[]> {
try {
// Sanitize the path
const sanitizedPath = path.replace(/[\s]+/g, ' ').trim();
const res = await fetch(`${BASE_URL}/${sanitizedPath}`, {
headers: {
'User-Agent': 'Mozilla/5.0 (compatible; OpenTK-MCP/1.0)'
},
// We would add timeout here, but it's not supported in the RequestInit type
});
Iif (!res.ok) {
// For 404 errors, return an empty array instead of failing
Iif (res.status === 404) {
console.error(`Sitemap not found: ${sanitizedPath}`);
return [];
}
throw new Error(`API error: ${res.status} ${res.statusText}`);
}
const text = await res.text();
// Check if the response is HTML (which would be an error for a sitemap)
Iif (text.trim().startsWith('<!DOCTYPE')) {
console.error(`The API returned HTML instead of a sitemap for path: ${sanitizedPath}`);
return [];
}
return text.trim().split(/\r?\n/).filter(line => line.trim() !== '');
} catch (error) {
console.error(`Error fetching sitemap: ${(error as Error).message}`);
throw error;
}
}
/**
* Fetches a list of all current Members of Parliament
* @returns Array of MP data
*/
async getPersons(): Promise<any[]> {
try {
// Fetch the HTML page that contains the MP list
const html = await this.fetchHtml("/kamerleden.html");
// Extract MP data from the HTML
const persons = this.extractPersonsFromHtml(html);
return persons;
} catch (error) {
console.error(`Error fetching persons: ${(error as Error).message}`);
return [];
}
}
/**
* Extracts MP data from the HTML of the kamerleden.html page
* @param html The HTML content of the kamerleden.html page
* @returns Array of MP data
*/
private extractPersonsFromHtml(html: string): any[] {
const persons: any[] = [];
try {
// Extract the table rows containing MP data
const tableRegex = /<table[^>]*>[\s\S]*?<tbody>([\s\S]*?)<\/tbody>/gi;
const tableMatch = tableRegex.exec(html);
Iif (!tableMatch || !tableMatch[1]) {
console.error("Could not find MP table in HTML");
return [];
}
const tableContent = tableMatch[1];
// Extract each row (MP) from the table
const rowRegex = /<tr[^>]*>([\s\S]*?)<\/tr>/gi;
let rowMatch;
while ((rowMatch = rowRegex.exec(tableContent)) !== null) {
const rowContent = rowMatch[1];
// Extract the MP ID from the link
const idRegex = /persoon\.html\?nummer=(\d+)/i;
const idMatch = rowContent.match(idRegex);
const id = idMatch ? parseInt(idMatch[1]) : null;
Iif (!id) continue;
// Extract the MP name
const nameRegex = /<a[^>]*>([\s\S]*?)<\/a>/i;
const nameMatch = rowContent.match(nameRegex);
const fullName = nameMatch ? nameMatch[1].trim() : "";
// Split the name into first and last name (simple approach)
const nameParts = fullName.split(" ");
const firstName = nameParts.length > 1 ? nameParts[0] : "";
const lastName = nameParts.length > 1 ? nameParts.slice(1).join(" ") : fullName;
// Extract the party
const partyRegex = /<td[^>]*>([\s\S]*?)<\/td>/gi;
const cells = [];
let cellMatch;
while ((cellMatch = partyRegex.exec(rowContent)) !== null) {
cells.push(cellMatch[1].trim());
}
// Party is typically in the second or third cell
const party = cells.length > 2 ? cells[2] : (cells.length > 1 ? cells[1] : "");
// Create the person object
persons.push({
Id: id,
Persoonsnummer: id,
Voornaam: firstName,
Achternaam: lastName,
Fullname: fullName,
Fractie: party,
FractieAfkorting: party,
Functie: "Tweede Kamerlid", // Assuming all are MPs
Links: {
self: `/persoon.html?nummer=${id}`
}
});
}
return persons;
} catch (error) {
console.error(`Error extracting persons from HTML: ${(error as Error).message}`);
return [];
}
}
/**
* Fetches details for a specific Member of Parliament
* @param id The ID of the MP to fetch
* @returns MP data or null if not found
*/
async getPerson(id: number): Promise<any | null> {
try {
// Fetch the HTML page for the specific MP
const html = await this.fetchHtml(`/persoon.html?nummer=${id}`);
// Extract the MP data from the HTML
const person = this.extractPersonFromHtml(html, id);
return person;
} catch (error) {
console.error(`Error fetching person with ID ${id}: ${(error as Error).message}`);
return null;
}
}
/**
* Extracts MP data from the HTML of the persoon.html page
* @param html The HTML content of the persoon.html page
* @param id The ID of the MP
* @returns MP data or null if not found
*/
private extractPersonFromHtml(html: string, id: number): any | null {
try {
// Extract the MP name from the title
const titleRegex = /<title>([\s\S]*?)<\/title>/i;
const titleMatch = html.match(titleRegex);
const fullName = titleMatch ? titleMatch[1].trim() : "";
// Split the name into first and last name (simple approach)
const nameParts = fullName.split(" ");
const firstName = nameParts.length > 1 ? nameParts[0] : "";
const lastName = nameParts.length > 1 ? nameParts.slice(1).join(" ") : fullName;
// Extract the party
const partyRegex = /<h4>([\s\S]*?)<\/h4>/i;
const partyMatch = html.match(partyRegex);
const party = partyMatch ? partyMatch[1].trim() : "";
// Create the person object
return {
Id: id,
Persoonsnummer: id,
Voornaam: firstName,
Achternaam: lastName,
Fullname: fullName,
Fractie: party,
FractieAfkorting: party,
Functie: "Tweede Kamerlid", // Assuming all are MPs
Links: {
self: `/persoon.html?nummer=${id}`
}
};
} catch (error) {
console.error(`Error extracting person from HTML: ${(error as Error).message}`);
return null;
}
}
}
// Export a singleton instance
export const apiService = new ApiService();
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