Advanced Drive Labels Service

/**
 * List labels available to the user.
 */
functionlistLabels(){
letpageToken=null;
letlabels=[];
do{
try{
constresponse=DriveLabels.Labels.list({
publishedOnly:true,
pageToken:pageToken
});
pageToken=response.nextPageToken;
labels=labels.concat(response.labels);
}catch(err){
// TODO (developer) - Handle exception
console.log('Failed to list labels with error %s',err.message);
}
}while(pageToken!=null);
console.log('Found %d labels',labels.length);
}

/**
 * Get a label by name.
 * @param {string} labelName The label name.
 */
functiongetLabel(labelName){
try{
constlabel=DriveLabels.Labels.get(labelName,{view:'LABEL_VIEW_FULL'});
consttitle=label.properties.title;
constfieldsLength=label.fields.length;
console.log(`Fetched label with title: '${title}' and ${fieldsLength} fields.`);
}catch(err){
// TODO (developer) - Handle exception
console.log('Failed to get label with error %s',err.message);
}
}

/**
 * List Labels on a Drive Item
 * Fetches a Drive Item and prints all applied values along with their to their
 * human-readable names.
 *
 * @param {string} fileId The Drive File ID
 */
functionlistLabelsOnDriveItem(fileId){
try{
constappliedLabels=Drive.Files.listLabels(fileId);
console.log('%d label(s) are applied to this file',appliedLabels.labels.length);
appliedLabels.labels.forEach((appliedLabel)=>{
// Resource name of the label at the applied revision.
constlabelName='labels/'+appliedLabel.id+'@'+appliedLabel.revisionId;
console.log('Fetching Label: %s',labelName);
constlabel=DriveLabels.Labels.get(labelName,{view:'LABEL_VIEW_FULL'});
console.log('Label Title: %s',label.properties.title);
Object.keys(appliedLabel.fields).forEach((fieldId)=>{
constfieldValue=appliedLabel.fields[fieldId];
constfield=label.fields.find((f)=>f.id==fieldId);
console.log(`Field ID: ${field.id}, Display Name: ${field.properties.displayName}`);
switch(fieldValue.valueType){
case'text':
console.log('Text: %s',fieldValue.text[0]);
break;
case'integer':
console.log('Integer: %d',fieldValue.integer[0]);
break;
case'dateString':
console.log('Date: %s',fieldValue.dateString[0]);
break;
case'user':
constuser=fieldValue.user.map((user)=>{
return`${user.emailAddress}: ${user.displayName}`;
}).join(', ');
console.log(`User: ${user}`);
break;
case'selection':
constchoices=fieldValue.selection.map((choiceId)=>{
returnfield.selectionOptions.choices.find((choice)=>choice.id===choiceId);
});
constselection=choices.map((choice)=>{
return`${choice.id}: ${choice.properties.displayName}`;
}).join(', ');
console.log(`Selection: ${selection}`);
break;
default:
console.log('Unknown: %s',fieldValue.valueType);
console.log(fieldValue.value);
}
});
});
}catch(err){
// TODO (developer) - Handle exception
console.log('Failed with error %s',err.message);
}
}