Add count property and DRY

lib/contracts/contribution.js

@@ -1,14 +1,9 @@
-const Base = require('./base');
+const Record = require('./record');
 const ContributionSerializer = require('../serializers/contribution');
-const paged = require('../utils/pagination');
 
-class Contribution extends Base {
-  all(options = {}) {
-    return this.functions.contributionsCount()
-      .then((count) => {
-        let records = paged(count, options).map((id) => this.getById(id));
-        return Promise.all(records);
-      });
+class Contribution extends Record {
+  get count () {
+    return this.functions.contributionsCount();
   }
 
   getById(id) {

lib/contracts/contributor.js

@@ -1,14 +1,9 @@
-const Base = require('./base');
+const Record = require('./record');
 const ContributorSerializer = require('../serializers/contributor');
-const paged = require('../utils/pagination');
 
-class Contributor extends Base {
-  all(options = {}) {
-    return this.functions.contributorsCount()
-      .then((count) => {
-        let records = paged(count, options).map((id) => this.getById(id));
-        return Promise.all(records);
-      });
+class Contributor extends Record {
+  get count () {
+    return this.functions.contributorsCount();
   }
 
   getById(id) {

lib/contracts/proposal.js

@@ -1,14 +1,9 @@
-const Base = require('./base');
+const Record = require('./record');
 const ContributionSerializer = require('../serializers/contribution');
-const paged = require('../utils/pagination');
 
-class Proposal extends Base {
-  all(options = {}) {
-    return this.functions.proposalsCount()
-      .then((count) => {
-        let records = paged(count, options).map((id) => this.getById(id));
-        return Promise.all(records);
-      });
+class Proposal extends Record {
+  get count () {
+    return this.functions.proposalsCount();
   }
 
   getById(id) {

lib/contracts/record.js

@@ -0,0 +1,14 @@
+const Base = require('./base');
+const paged = require('../utils/pagination');
+
+class Record extends Base {
+  all(options = {}) {
+    return this.count
+      .then((count) => {
+        let records = paged(count, options).map((id) => this.getById(id));
+        return Promise.all(records);
+      });
+  }
+}
+
+module.exports = Record