feat: relay id data photos to server

lib/customers.js

@@ -20,6 +20,7 @@ const notifierUtils = require('./notifier/utils')
 const NUM_RESULTS = 1000
 const idPhotoCardBasedir = _.get('idPhotoCardDir', options)
 const frontCameraBaseDir = _.get('frontCameraDir', options)
+const idCardDataDir = _.get('idCardDataDir', options)
 
 /**
  * Add new customer
@@ -570,6 +571,77 @@ function updatePhotoCard (id, patch) {
     })
 }
 
+/**
+ * @param {String} imageData image encoded
+ * @param {String} directory directory path of id card data for a certain user
+ */
+
+function updatePhoto (imageData, directory) {
+  return Promise.resolve(imageData)
+    .then(patch => {
+      if (_.isEmpty(imageData)) {
+        return patch
+      }
+
+      const newPatch = {
+        idCardDataPath: ''
+      }
+
+      // decode the base64 string to binary data
+      const decodedImageData = Buffer.from(imageData, 'base64')
+
+      // workout the image hash
+      // i.e. 240e85ff2e4bb931f235985dd0134e459239496d2b5af6c5665168d38ef89b50
+      const hash = crypto
+        .createHash('sha256')
+        .update(imageData)
+        .digest('hex')
+
+      // workout the image folder
+      // i.e. 24/0e/85
+      const rpath = _.join(path.sep, _.map(_.wrap(_.join, ''), _.take(3, _.chunk(2, _.split('', hash)))))
+
+      // i.e. ../<lamassu-server-home>/idcardphoto/customer_id/24/0e/85
+      const dirname = path.join(directory, rpath)
+
+      // create the directory tree if needed
+      _.attempt(() => makeDir.sync(dirname))
+
+      // i.e. ../<lamassu-server-home>/idcardphoto/customer_id/24/0e/85/240e85ff2e4bb931f235985dd01....jpg
+      const filename = path.join(dirname, hash + '.jpg')
+
+      //
+      // i.e. {
+      //   "idCardDataPath": "24/0e/85/240e85ff2e4bb931f235985dd01....jpg",
+      //   "idCardDataAt": "now()"
+      // }
+      newPatch.idCardData = path.join(rpath)
+      newPatch.idCardDataAt = 'now()'
+
+      // write image file
+      return writeFile(filename, decodedImageData)
+        .then(() => newPatch)
+    })
+}
+
+/**
+ * @param {String} id customer id
+ * @param {Object} patch customer latest id card photos
+ * @returns {Promise<Object>} new patch to be applied
+ */
+function updateIdCardData (patch, id) {
+  const directory = idCardDataDir + '/' + id
+  return Promise.resolve(patch)
+    .then(patch => {
+      const imagesData = _.get('photos', patch)
+      _.map(imageData => {
+        return updatePhoto(imageData, directory)
+          .then(newPatch => newPatch)
+          .catch(err => console.log('An error ocurred while saving the image ', err))
+      }, imagesData)
+    })
+}
+
 function updateFrontCamera (id, patch) {
   return Promise.resolve(patch)
     .then(patch => {
@@ -620,4 +692,4 @@ function updateFrontCamera (id, patch) {
     })
 }
 
-module.exports = { add, get, batch, getCustomersList, getCustomerById, getById, update, updateCustomer, updatePhotoCard, updateFrontCamera }
+module.exports = { add, get, batch, getCustomersList, getCustomerById, getById, update, updateCustomer, updatePhotoCard, updateFrontCamera, updateIdCardData }