| /** |
| * Delete a view from design document in Cloudant database: |
| * https://docs.cloudant.com/design_documents.html |
| **/ |
| |
| var DESIGN_PREFIX = '_design/'; |
| |
| function main(message) { |
| var cloudantOrError = getCloudantAccount(message); |
| if (typeof cloudantOrError !== 'object') { |
| return Promise.reject(cloudantOrError); |
| } |
| var cloudant = cloudantOrError; |
| var dbName = message.dbname; |
| var docId = message.docid; |
| var viewName = message.viewname; |
| var params = {}; |
| |
| if(!dbName) { |
| return Promise.reject('dbname is required.'); |
| } |
| if(!docId) { |
| return Promise.reject('docid is required.'); |
| } |
| var cloudantDb = cloudant.use(dbName); |
| |
| if(!viewName) { |
| return Promise.reject('viewname is required.'); |
| } |
| if (typeof message.params === 'object') { |
| params = message.params; |
| } else if (typeof message.params === 'string') { |
| try { |
| params = JSON.parse(message.params); |
| } catch (e) { |
| return Promise.reject('params field cannot be parsed. Ensure it is valid JSON.'); |
| } |
| } |
| |
| return deleteViewFromDesignDoc(cloudantDb, docId, viewName, params); |
| } |
| |
| function deleteViewFromDesignDoc(cloudantDb, docId, viewName, params) { |
| //Check that doc id contains _design prefix |
| if (docId.indexOf(DESIGN_PREFIX) !== 0) { |
| docId = DESIGN_PREFIX + docId; |
| } |
| |
| return getDocument(cloudantDb, docId) |
| .then(function(document) { |
| console.log("Got document: " + document); |
| delete document.views[viewName]; |
| |
| //Update the design document after removing the view |
| return insert(cloudantDb, document, params); |
| }); |
| } |
| |
| function getDocument(cloudantDb, docId) { |
| return new Promise(function(resolve, reject) { |
| cloudantDb.get(docId, function(error, response) { |
| if (!error) { |
| console.log("Got response: " + response); |
| resolve(response); |
| } else { |
| console.log("Got error: " + error); |
| reject(error); |
| } |
| }); |
| }); |
| } |
| |
| function insert(cloudantDb, doc, params) { |
| return new Promise(function(resolve, reject) { |
| cloudantDb.insert(doc, params, function(error, response) { |
| if (!error) { |
| console.log('success', response); |
| resolve(response); |
| } else { |
| console.log('error', error); |
| reject(error); |
| } |
| }); |
| }); |
| } |
| |
| function getCloudantAccount(message) { |
| // full cloudant URL - Cloudant NPM package has issues creating valid URLs |
| // when the username contains dashes (common in Bluemix scenarios) |
| var cloudantUrl; |
| |
| if (message.url) { |
| // use bluemix binding |
| cloudantUrl = message.url; |
| } else { |
| if (!message.host) { |
| return 'cloudant account host is required.'; |
| } |
| if (!message.username) { |
| return 'cloudant account username is required.'; |
| } |
| if (!message.password) { |
| return 'cloudant account password is required.'; |
| } |
| |
| cloudantUrl = "https://" + message.username + ":" + message.password + "@" + message.host; |
| } |
| |
| return require('cloudant')({ |
| url: cloudantUrl |
| }); |
| } |