shrink the contents of the QR code so people can scan it

src/libs/util.ts

@@ -882,6 +882,71 @@ export const contactToCsvLine = (contact: Contact): string => {
   return fields.join(",");
 };
 
+/**
+ * Parses a CSV line into a Contact object. See contactToCsvLine for the format.
+ * @param lineRaw - The CSV line to parse
+ * @returns A Contact object
+ */
+export const csvLineToContact = (lineRaw: string): Contact => {
+  // Note that Endorser Mobile puts name first, then did, etc.
+  let line = lineRaw.trim();
+  let did, publicKeyInput, seesMe, registered;
+  let name;
+  let commaPos1 = -1;
+  if (line.startsWith('"')) {
+    let doubleDoubleQuotePos = line.lastIndexOf('""') + 2;
+    if (doubleDoubleQuotePos === -1) {
+      doubleDoubleQuotePos = 1;
+    }
+    const quote2Pos = line.indexOf('"', doubleDoubleQuotePos);
+    if (quote2Pos > -1) {
+      commaPos1 = line.indexOf(",", quote2Pos);
+      name = line.substring(1, quote2Pos).trim();
+      name = name.replace(/""/g, '"');
+    } else {
+      // something is weird with one " to start, so ignore it and start after "
+      line = line.substring(1);
+      commaPos1 = line.indexOf(",");
+      name = line.substring(0, commaPos1).trim();
+    }
+  } else {
+    commaPos1 = line.indexOf(",");
+    name = line.substring(0, commaPos1).trim();
+  }
+  if (commaPos1 > -1) {
+    did = line.substring(commaPos1 + 1).trim();
+    const commaPos2 = line.indexOf(",", commaPos1 + 1);
+    if (commaPos2 > -1) {
+      did = line.substring(commaPos1 + 1, commaPos2).trim();
+      publicKeyInput = line.substring(commaPos2 + 1).trim();
+      const commaPos3 = line.indexOf(",", commaPos2 + 1);
+      if (commaPos3 > -1) {
+        publicKeyInput = line.substring(commaPos2 + 1, commaPos3).trim();
+        seesMe = line.substring(commaPos3 + 1).trim() == "true";
+        const commaPos4 = line.indexOf(",", commaPos3 + 1);
+        if (commaPos4 > -1) {
+          seesMe = line.substring(commaPos3 + 1, commaPos4).trim() == "true";
+          registered = line.substring(commaPos4 + 1).trim() == "true";
+        }
+      }
+    }
+  }
+  // help with potential mistakes while this sharing requires copy-and-paste
+  let publicKeyBase64 = publicKeyInput;
+  if (publicKeyBase64 && /^[0-9A-Fa-f]{66}$/i.test(publicKeyBase64)) {
+    // it must be all hex (compressed public key), so convert
+    publicKeyBase64 = Buffer.from(publicKeyBase64, "hex").toString("base64");
+  }
+  const newContact: Contact = {
+    did: did || "",
+    name,
+    publicKeyBase64,
+    seesMe,
+    registered,
+  };
+  return newContact;
+};
+
 /**
  * Interface for the JSON export format of database tables
  */