// validation function which checks the proposed file's type, size, and name
const validationFunctions = {
validateFile: function (file) {
if (!file) {
console.log('no file found');
throw new Error('no file provided');
}
if (/'/.test(file.name)) {
console.log('file name had apostrophe in it');
throw new Error('apostrophes are not allowed in the file name');
}
// validate size and type
switch (file.type) {
case 'image/jpeg':
case 'image/jpg':
case 'image/png':
if (file.size > 10000000) {
console.log('file was too big');
throw new Error('Sorry, images are limited to 10 megabytes.');
}
break;
case 'image/gif':
if (file.size > 50000000) {
console.log('file was too big');
throw new Error('Sorry, .gifs are limited to 50 megabytes.');
}
break;
case 'video/mp4':
if (file.size > 50000000) {
console.log('file was too big');
throw new Error('Sorry, videos are limited to 50 megabytes.');
}
break;
default:
console.log('file type is not supported');
throw new Error(file.type + ' is not a supported file type. Only, .jpeg, .png, .gif, and .mp4 files are currently supported.')
}
},
// validation function that checks to make sure the claim name is valid
validateClaimName: function (name) {
// ensure a name was entered
if (name.length < 1) {
throw new NameError("You must enter a name for your url");
}
// validate the characters in the 'name' field
const invalidCharacters = /[^A-Za-z0-9,-]/g.exec(name);
if (invalidCharacters) {
throw new NameError('"' + invalidCharacters + '" characters are not allowed');
}
},
validateChannelName: function (name) {
name = name.substring(name.indexOf('@') + 1);
// ensure a name was entered
if (name.length < 1) {
throw new ChannelNameError("You must enter a name for your channel");
}
// validate the characters in the 'name' field
const invalidCharacters = /[^A-Za-z0-9,-,@]/g.exec(name);
if (invalidCharacters) {
throw new ChannelNameError('"' + invalidCharacters + '" characters are not allowed');
}
},
validatePassword: function (password) {
if (password.length < 1) {
throw new ChannelPasswordError("You must enter a password for you channel");
}
},
cleanseClaimName: function (name) {
name = name.replace(/\s+/g, '-'); // replace spaces with dashes
name = name.replace(/[^A-Za-z0-9-]/g, ''); // remove all characters that are not A-Z, a-z, 0-9, or '-'
return name;
},
// validation functions to check claim & channel name eligibility as the inputs change
isNameAvailable: function (name, apiUrl) {
const url = apiUrl + name;
return getRequest(url)
},
showError: function (errorDisplay, errorMsg) {
errorDisplay.hidden = false;
errorDisplay.innerText = errorMsg;
},
hideError: function (errorDisplay) {
errorDisplay.hidden = true;
errorDisplay.innerText = '';
},
showSuccess: function (successElement) {
successElement.hidden = false;
successElement.innerHTML = "✔";
},
hideSuccess: function (successElement) {
successElement.hidden = true;
successElement.innerHTML = "";
},
checkAvailability: function (name, successDisplayElement, errorDisplayElement, validateName, errorMessage, apiUrl) {
var that = this;
try {
// check to make sure the characters are valid
validateName(name);
// check to make sure it is available
that.isNameAvailable(name, apiUrl)
.then(function (result) {
if (result === true) {
that.hideError(errorDisplayElement);
that.showSuccess(successDisplayElement)
} else {
that.hideSuccess(successDisplayElement);
that.showError(errorDisplayElement, errorMessage);
}
})
.catch(error => {
that.hideSuccess(successDisplayElement);
that.showError(errorDisplayElement, error.message);
});
} catch (error) {
that.hideSuccess(successDisplayElement);
that.showError(errorDisplayElement, error.message);
}
},
checkClaimName: function (name) {
const successDisplayElement = document.getElementById('input-success-claim-name');
const errorDisplayElement = document.getElementById('input-error-claim-name');
this.checkAvailability(name, successDisplayElement, errorDisplayElement, this.validateClaimName, 'Sorry, that ending is already taken', '/api/is-claim-available/');
},
checkChannelName: function (name) {
const successDisplayElement = document.getElementById('input-success-channel-name');
const errorDisplayElement = document.getElementById('input-error-channel-name');
name = `@${name}`;
this.checkAvailability(name, successDisplayElement, errorDisplayElement, this.validateChannelName, 'Sorry, that name is already taken', '/api/is-channel-available/');
},
// validation function which checks all aspects of the publish submission
validateFilePublishSubmission: function (stagedFiles, metadata) {
const channelName = metadata.channelName;
const claimName = metadata.name;
var that = this;
return new Promise(function (resolve, reject) {
// 1. make sure 1 file was staged
if (!stagedFiles) {
reject(new FileError("Please select a file"));
return;
} else if (stagedFiles.length > 1) {
reject(new FileError("Only one file is allowed at a time"));
return;
}
// 2. validate the file's name, type, and size
try {
that.validateFile(stagedFiles[0]);
} catch (error) {
reject(error);
return;
}
// 3. validate that a channel was chosen
if (channelName === 'new' || channelName === 'login') {
reject(new ChannelNameError("Please log in to a channel"));
return;
}
;
// 4. validate the claim name
try {
that.validateClaimName(claimName);
} catch (error) {
reject(error);
return;
}
// if all validation passes, check availability of the name (note: do we need to re-validate channel name vs. credentials as well?)
return that.isNameAvailable(claimName, '/api/is-claim-available/')
.then(result => {
if (result) {
resolve();
} else {
reject(new NameError('Sorry, that ending is already taken'));
}
})
.catch(error => {
reject(error);
});
});
},
// validation function which checks all aspects of a new channel submission
validateNewChannelSubmission: function (userName, password) {
const channelName = `@${userName}`;
var that = this;
return new Promise(function (resolve, reject) {
// 1. validate name
try {
that.validateChannelName(channelName);
} catch (error) {
return reject(error);
}
// 2. validate password
try {
that.validatePassword(password);
} catch (error) {
return reject(error);
}
// 3. if all validation passes, check availability of the name
that.isNameAvailable(channelName, '/api/is-channel-available/') // validate the availability
.then(function(result) {
if (result) {
resolve();
} else {
reject(new ChannelNameError('Sorry, that name is already taken'));
}
})
.catch(function(error) {
console.log('error evaluating channel name availability', error);
reject(error);
});
});
},
// validation function which checks all aspects of a new channel login
validateNewChannelLogin: function (userName, password) {
const channelName = `@${userName}`;
var that = this;
return new Promise(function (resolve, reject) {
// 1. validate name
try {
that.validateChannelName(channelName);
} catch (error) {
return reject(error);
}
// 2. validate password
try {
that.validatePassword(password);
} catch (error) {
return reject(error);
}
resolve();
});
}
};