// validation function which checks the proposed file's type, size, and name function validateFile(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 function validateClaimName (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'); } } function validateChannelName (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'); } } function validatePassword (password) { if (password.length < 1) { throw new ChannelPasswordError("You must enter a password for you channel"); } } function cleanseClaimName(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 function isNameAvailable (name, apiUrl) { const url = apiUrl + name; return getRequest(url) } function showError(errorDisplay, errorMsg) { errorDisplay.hidden = false; errorDisplay.innerText = errorMsg; } function hideError(errorDisplay) { errorDisplay.hidden = true; errorDisplay.innerText = ''; } function showSuccess (successElement) { successElement.hidden = false; successElement.innerHTML = "✔"; } function hideSuccess (successElement) { successElement.hidden = true; successElement.innerHTML = ""; } function checkAvailability(name, successDisplayElement, errorDisplayElement, validateName, isNameAvailable, errorMessage, apiUrl) { try { // check to make sure the characters are valid validateName(name); // check to make sure it is available isNameAvailable(name, apiUrl) .then(result => { if (result === true) { hideError(errorDisplayElement); showSuccess(successDisplayElement) } else { hideSuccess(successDisplayElement); showError(errorDisplayElement, errorMessage); } }) .catch(error => { hideSuccess(successDisplayElement); showError(errorDisplayElement, error.message); }); } catch (error) { hideSuccess(successDisplayElement); showError(errorDisplayElement, error.message); } } function checkClaimName(name){ const successDisplayElement = document.getElementById('input-success-claim-name'); const errorDisplayElement = document.getElementById('input-error-claim-name'); checkAvailability(name, successDisplayElement, errorDisplayElement, validateClaimName, isNameAvailable, 'Sorry, that ending is already taken', '/api/isClaimAvailable/'); } function checkChannelName(name){ const successDisplayElement = document.getElementById('input-success-channel-name'); const errorDisplayElement = document.getElementById('input-error-channel-name'); name = `@${name}`; checkAvailability(name, successDisplayElement, errorDisplayElement, validateChannelName, isNameAvailable, 'Sorry, that name is already taken', '/api/isChannelAvailable/'); } // validation function which checks all aspects of the publish submission function validateFilePublishSubmission(stagedFiles, claimName, channelName){ return new Promise(function (resolve, reject) { // 1. make sure 1 file was staged if (!stagedFiles) { reject(new FileError("Please select a file")); return; } else if (stagedFiles.length > 1) { reject(new FileError("Only one file is allowed at a time")); return; } // 2. validate the file's name, type, and size try { validateFile(stagedFiles[0]); } catch (error) { reject(error); return; } // 3. validate that a channel was chosen if (channelName === 'new' || channelName === 'login') { reject(new ChannelNameError("Please log in to a channel")); return; }; // 4. validate the claim name try { validateClaimName(claimName); } catch (error) { reject(error); return; } // if all validation passes, check availability of the name (note: do we need to re-validate channel name vs. credentials as well?) return isNameAvailable(claimName, '/api/isClaimAvailable/') .then(result => { if (result) { resolve(); } else { reject(new NameError('Sorry, that ending is already taken')); } }) .catch(error => { reject(error); }); }); } // validation function which checks all aspects of a new channel submission function validateNewChannelSubmission(userName, password){ const channelName = `@${userName}`; return new Promise(function (resolve, reject) { // 1. validate name try { validateChannelName(channelName); } catch (error) { return reject(error); } // 2. validate password try { validatePassword(password); } catch (error) { return reject(error); } // 3. if all validation passes, check availability of the name isNameAvailable(channelName, '/api/isChannelAvailable/') // validate the availability .then(result => { if (result) { resolve(); } else { reject(new ChannelNameError('Sorry, that name is already taken')); } }) .catch( error => { console.log('error evaluating channel name availability', error); reject(error); }); }); } // validation function which checks all aspects of a new channel login function validateNewChannelLogin(userName, password){ const channelName = `@${userName}`; return new Promise(function (resolve, reject) { // 1. validate name try { validateChannelName(channelName); } catch (error) { return reject(error); } // 2. validate password try { validatePassword(password); } catch (error) { return reject(error); } resolve(); }); }