121 lines
3.3 KiB
C++
121 lines
3.3 KiB
C++
#include "dwd.h"
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String emptyDWDResponse = "Es sind keine Warnungen";
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DWDClient::DWDClient(WiFiClient *client)
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{
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_client = client;
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}
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void DWDClient::begin(int intervalMinutes, String region)
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{
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this->rssUrl = "https://wettwarn.de/rss/";
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this->rssUrl.concat(region);
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this->rssUrl.concat(".rss");
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this->checkInterval = 60e3 * intervalMinutes;
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Serial.printf("[DWD]: check Interval : %dms\n", this->checkInterval);
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this->check();
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}
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void DWDClient::loop()
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{
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if (millis() - this->lastCheck >= this->checkInterval)
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{
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this->lastCheck = millis();
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this->check();
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}
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}
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bool DWDClient::isDirty()
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{
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if (this->_dirty)
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{
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this->_dirty = false;
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return true;
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}
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return false;
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}
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void DWDClient::check()
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{
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Serial.println("[DWD]: checking " + this->rssUrl);
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this->_http.begin(this->rssUrl);
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int httpCode = this->_http.GET();
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if (httpCode > 0)
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{
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this->rssData = this->_http.getString();
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if (this->rssData.length() == 0)
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{
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Serial.println("Error: Empty RSS feed response!");
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return;
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}
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this->currentMessage = this->parseRSS(this->rssData);
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Serial.println("[DWD]: Current Message = " + this->currentMessage);
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if (this->currentMessage.equals(this->lastMessage) == false)
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{
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if (this->currentMessage.indexOf(emptyDWDResponse) == -1) {
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this->_dirty = true;
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}
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this->lastMessage = this->currentMessage;
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}
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}
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else
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{
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Serial.printf("HTTP request failed, error: %s\n", this->_http.errorToString(httpCode).c_str());
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}
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this->_http.end();
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}
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String DWDClient::parseRSS(String xmlData)
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{
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int itemStart = 0, itemEnd = 0;
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while ((itemStart = xmlData.indexOf("<item>", itemEnd)) != -1)
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{
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itemEnd = xmlData.indexOf("</item>", itemStart);
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if (itemEnd == -1)
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break;
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String itemData = xmlData.substring(itemStart, itemEnd); // Extract the <item> block
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// Extract Description (with CDATA)
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// static String descriptionTag = ;
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String description = this->extractTagContent(itemData, "description");
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description.replace("DWD UNWETTERWARNUNG:", "DWD:");
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description.replace("DWD WETTERWARNUNG:", "DWD:");
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description.replace(" in ", " ");
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description.replace(" von ", "/");
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int pos = description.indexOf("Quelle:");
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if (pos > -1)
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{
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description = description.substring(0, pos); // Truncate at "Quelle:"
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}
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return description;
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}
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return emptyString;
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}
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String DWDClient::extractTagContent(String source, String tag)
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{
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int start = source.indexOf("<" + tag + ">");
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int end = source.indexOf("</" + tag + ">", start);
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if (start == -1 || end == -1)
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return "Not Found";
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String content = source.substring(start + tag.length() + 2, end);
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// Handle CDATA safely
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int cdataStart = content.indexOf("<![CDATA[");
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int cdataEnd = content.indexOf("]]>", cdataStart);
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if (cdataStart != -1 && cdataEnd != -1 && cdataEnd > cdataStart)
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{
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content = content.substring(cdataStart + 9, cdataEnd); // Extract CDATA content
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}
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content.replace("<br />", " ");
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content.replace("\n", " ");
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return content;
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}
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