From 8352e5811d48cc40346238b60a67e2d6a69e7fe3 Mon Sep 17 00:00:00 2001
From: Nic Limper <nic@xs4all.nl>
Date: Wed, 22 Mar 2023 23:23:36 +0100
Subject: [PATCH] QR content card

---
 esp32_fw/data/www/index.html      |  1 +
 esp32_fw/data/www/main.js         |  3 +-
 esp32_fw/include/contentmanager.h |  1 +
 esp32_fw/src/contentmanager.cpp   | 54 +++++++++++++++++++++++++++++--
 4 files changed, 56 insertions(+), 3 deletions(-)

diff --git a/esp32_fw/data/www/index.html b/esp32_fw/data/www/index.html
index d67668e7..337e9c9e 100644
--- a/esp32_fw/data/www/index.html
+++ b/esp32_fw/data/www/index.html
@@ -34,6 +34,7 @@
 				<option value="9">rss feed</option>
 				<option value="6">memo text</option>
 				<option value="7">image url</option>
+				<option value="10">qr code</option>
 				<option value="5">firmware update</option>
 			</select>
 		</p>
diff --git a/esp32_fw/data/www/main.js b/esp32_fw/data/www/main.js
index c4982801..51de5f1e 100644
--- a/esp32_fw/data/www/main.js
+++ b/esp32_fw/data/www/main.js
@@ -8,7 +8,7 @@ const WAKEUP_REASON_FIRSTBOOT = 0xFC;
 const WAKEUP_REASON_NETWORK_SCAN = 0xFD;
 const WAKEUP_REASON_WDT_RESET = 0xFE;
 
-const contentModes = ["Static image", "Current date", "Counting days", "Counting hours", "Current weather", "Firmware update", "Memo text", "Image url", "Weather forecast","RSS feed"];
+const contentModes = ["Static image", "Current date", "Counting days", "Counting hours", "Current weather", "Firmware update", "Memo text", "Image url", "Weather forecast", "RSS feed", "QR code"];
 const models = ["1.54\" 152x152px", "2.9\" 296x128px", "4.2\" 400x300px"];
 const displaySizeLookup = { 0: [152, 152], 1: [128, 296], 2: [400, 300] };
 const colorTable = { 0: [255, 255, 255], 1: [0, 0, 0], 2: [255, 0, 0], 3: [255, 0, 0] };
@@ -23,6 +23,7 @@ contentModeOptions[6] = ["text"];
 contentModeOptions[7] = ["url","interval"];
 contentModeOptions[8] = ["location"];
 contentModeOptions[9] = ["title", "url", "interval"];
+contentModeOptions[10] = ["title", "qr-content"];
 
 const imageQueue = [];
 let isProcessing = false;
diff --git a/esp32_fw/include/contentmanager.h b/esp32_fw/include/contentmanager.h
index 3a2d1978..5b5bcb48 100644
--- a/esp32_fw/include/contentmanager.h
+++ b/esp32_fw/include/contentmanager.h
@@ -27,6 +27,7 @@ void drawForecast(String &filename, String location, tagRecord *&taginfo, imgPar
 void drawIdentify(String &filename, tagRecord *&taginfo, imgParam &imageParams);
 bool getImgURL(String &filename, String URL, time_t fetched, imgParam &imageParams);
 bool getRSSfeed(String &filename, String URL, String title, tagRecord *&taginfo, imgParam &imageParams);
+void drawQR(String &filename, String qrcontent, String title, tagRecord *&taginfo, imgParam &imageParams);
 char *formatHttpDate(time_t t);
 String urlEncode(const char *msg);
 int windSpeedToBeaufort(float windSpeed);
diff --git a/esp32_fw/src/contentmanager.cpp b/esp32_fw/src/contentmanager.cpp
index f16f6db4..c2317fd2 100644
--- a/esp32_fw/src/contentmanager.cpp
+++ b/esp32_fw/src/contentmanager.cpp
@@ -3,7 +3,6 @@
 #include <Arduino.h>
 #include <ArduinoJson.h>
 #include <HTTPClient.h>
-#include "newproto.h"
 #include <MD5Builder.h>
 #include <locale.h>
 #include <rssClass.h>
@@ -12,6 +11,8 @@
 #include "U8g2_for_TFT_eSPI.h"
 #include "commstructs.h"
 #include "makeimage.h"
+#include "newproto.h"
+#include "qrcode.h"
 #include "web.h"
 
 #define PAL_BLACK 0
@@ -29,6 +30,7 @@ enum contentModes {
     ImageUrl,
     Forecast,
     RSSFeed,
+    QRcode,
 };
 
 void contentRunner() {
@@ -185,7 +187,14 @@ void drawNew(uint8_t mac[8], bool buttonPressed, tagRecord *&taginfo) {
                 taginfo->nextupdate = now + 300;
             }
             break;
-    }
+
+        case QRcode:
+
+            drawQR(filename, cfgobj["qr-content"], cfgobj["title"], taginfo, imageParams);
+            taginfo->nextupdate = now + 12 * 3600;
+            updateTagImage(filename, mac, 0, imageParams);
+            break;
+        }
 
     taginfo->modeConfigJson = doc.as<String>();
 }
@@ -635,6 +644,47 @@ bool getRSSfeed(String &filename, String URL, String title, tagRecord *&taginfo,
     return true;
 }
 
+void drawQR(String &filename, String qrcontent, String title, tagRecord *&taginfo, imgParam &imageParams) {
+    TFT_eSPI tft = TFT_eSPI();
+    TFT_eSprite spr = TFT_eSprite(&tft);
+    LittleFS.begin();
+
+    const char *text = qrcontent.c_str();
+    QRCode qrcode;
+    uint8_t qrcodeData[qrcode_getBufferSize(2)];
+    // https://github.com/ricmoo/QRCode
+    qrcode_initText(&qrcode, qrcodeData, 2, ECC_MEDIUM, text);
+    int size = qrcode.size;
+    int xpos = 0, ypos = 0, dotsize = 1;
+
+    if (taginfo->hwType == SOLUM_29_033) {
+        initSprite(spr, 296, 128);
+        drawString(spr, title, 10, 5, "fonts/bahnschrift20");
+        dotsize = int((128 - 25) / size);
+        xpos = 149 - dotsize*size /2;
+        ypos = 25;
+    } else if (taginfo->hwType == SOLUM_154_033) {
+        initSprite(spr, 152, 152);
+        spr.setTextFont(2);
+        spr.setTextColor(PAL_BLACK, PAL_WHITE);
+        spr.drawString(title, 10, 5);
+        dotsize = int((152 - 20) / size);
+        xpos = 76 - dotsize*size / 2;
+        ypos = 20;
+    }
+
+    for (int y = 0; y < size; y++) {
+        for (int x = 0; x < size; x++) {
+            if (qrcode_getModule(&qrcode, x, y)) {
+                spr.fillRect(xpos + x * dotsize, ypos + y * dotsize, dotsize, dotsize, PAL_BLACK);
+            }
+        }
+    }
+
+    spr2buffer(spr, filename, imageParams);
+    spr.deleteSprite();
+}
+
 char *formatHttpDate(time_t t) {
     static char buf[40];
     struct tm *timeinfo;