vcard = FileAttachment("vcard-example.vcf").text()
data = parse(vcard)
fieldPropertyMapping = ({
TITLE: "title",
TEL: "telephone",
FN: "displayName",
N: "name",
EMAIL: "email",
CATEGORIES: "categories",
ADR: "address",
URL: "url",
NOTE: "notes",
ORG: "organization",
BDAY: "birthday",
PHOTO: "photo"
})
function lookupField(context, fieldName) {
var propertyName = fieldPropertyMapping[fieldName];
if (!propertyName && fieldName !== "BEGIN" && fieldName !== "END") {
context.info("define property name for " + fieldName);
propertyName = fieldName;
}
return propertyName;
}
function removeWeirdItemPrefix(line) {
// sometimes lines are prefixed by "item" keyword like "item1.ADR;type=WORK:....."
return line.substring(0, 4) === "item" ? line.match(/item\d\.(.*)/)[1] : line;
}
function singleLine(context, fieldValue, fieldName) {
// convert escaped new lines to real new lines.
fieldValue = fieldValue.replace("\\n", "\n");
// append value if previously specified
if (context.currentCard[fieldName]) {
context.currentCard[fieldName] += "\n" + fieldValue;
} else {
context.currentCard[fieldName] = fieldValue;
}
}
function typedLine(context, fieldValue, fieldName, typeInfo, valueFormatter) {
var isDefault = false;
// strip type info and find out is that preferred value
typeInfo = typeInfo.filter(function (type) {
isDefault = isDefault || type.name === "PREF";
return type.name !== "PREF";
});
typeInfo = typeInfo.reduce(function (p, c) {
p[c.name] = c.value;
return p;
}, {});
context.currentCard[fieldName] = context.currentCard[fieldName] || [];
context.currentCard[fieldName].push({
isDefault: isDefault,
valueInfo: typeInfo,
value: valueFormatter ? valueFormatter(fieldValue) : fieldValue
});
}
function commaSeparatedLine(context, fieldValue, fieldName) {
context.currentCard[fieldName] = fieldValue.split(",");
}
function dateLine(context, fieldValue, fieldName) {
// if value is in "19531015T231000Z" format strip time field and use date value.
fieldValue = fieldValue.length === 16 ? fieldValue.substr(0, 8) : fieldValue;
var dateValue;
if (fieldValue.length === 8) {
// "19960415" format ?
dateValue = new Date(
fieldValue.substr(0, 4),
fieldValue.substr(4, 2),
fieldValue.substr(6, 2)
);
} else {
// last chance to try as date.
dateValue = new Date(fieldValue);
}
if (!dateValue || isNaN(dateValue.getDate())) {
dateValue = null;
context.error("invalid date format " + fieldValue);
}
context.currentCard[fieldName] = dateValue && dateValue.toJSON(); // always return the ISO date format
}
function structured(fields) {
return function (context, fieldValue, fieldName) {
var values = fieldValue.split(";");
context.currentCard[fieldName] = fields.reduce(function (p, c, i) {
p[c] = values[i] || "";
return p;
}, {});
};
}
function addressLine(context, fieldValue, fieldName, typeInfo) {
typedLine(context, fieldValue, fieldName, typeInfo, function (value) {
var names = value.split(";");
return {
// ADR field sequence
postOfficeBox: names[0],
number: names[1],
street: names[2] || "",
city: names[3] || "",
region: names[4] || "",
postalCode: names[5] || "",
country: names[6] || ""
};
});
}
function noop() {}
function endCard(context) {
// store card in context and create a new card.
context.cards.push(context.currentCard);
context.currentCard = {};
}
fieldParsers = ({
BEGIN: noop,
VERSION: noop,
N: structured(["surname", "name", "additionalName", "prefix", "suffix"]),
TITLE: singleLine,
TEL: typedLine,
EMAIL: typedLine,
ADR: addressLine,
NOTE: singleLine,
NICKNAME: commaSeparatedLine,
BDAY: dateLine,
URL: singleLine,
CATEGORIES: commaSeparatedLine,
END: endCard,
FN: singleLine,
ORG: singleLine,
UID: singleLine,
PHOTO: singleLine
})
function feedData(context) {
for (var i = 0; i < context.data.length; i++) {
var line = removeWeirdItemPrefix(context.data[i]);
var pairs = line.split(":"),
fieldName = pairs[0],
fieldTypeInfo,
fieldValue = pairs.slice(1).join(":");
// is additional type info provided ?
if (fieldName.indexOf(";") >= 0 && line.indexOf(";") < line.indexOf(":")) {
var typeInfo = fieldName.split(";");
fieldName = typeInfo[0];
fieldTypeInfo = typeInfo.slice(1).map(function (type) {
var info = type.split("=");
return {
name: info[0].toLowerCase(),
value: info[1].replace(/"(.*)"/, "$1")
};
});
}
// ensure fieldType is in upper case
fieldName = fieldName.toUpperCase();
var fieldHandler = fieldParsers[fieldName];
if (fieldHandler) {
fieldHandler(
context,
fieldValue,
lookupField(context, fieldName),
fieldTypeInfo
);
} else if (fieldName.substring(0, 2) != "X-") {
// ignore X- prefixed extension fields.
context.info("unknown field " + fieldName + " with value " + fieldValue);
}
}
}
function parse(data) {
var lines = data
// replace escaped new lines
.replace(/\n\s{1}/g, "")
// split if a character is directly after a newline
.split(/\r\n(?=\S)|\r(?=\S)|\n(?=\S)/);
var context = {
info: function (desc) {
console.info(desc);
},
error: function (err) {
console.error(err);
},
data: lines,
currentCard: {},
cards: []
};
feedData(context);
return context.cards;
}
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
