From 7249dc10568091194a77990513fa2b77fdbd088a Mon Sep 17 00:00:00 2001
From: Sean Fridman <fridman@mail.sfsu.edu>
Date: Fri, 10 Jul 2015 17:31:40 -0400
Subject: Implement basic foreign key support

---
 app/node_modules/okadminview/index.js | 100 +++++++++++++++++++++++++---------
 1 file changed, 74 insertions(+), 26 deletions(-)

(limited to 'app/node_modules/okadminview/index.js')

diff --git a/app/node_modules/okadminview/index.js b/app/node_modules/okadminview/index.js
index 273d541..06656dc 100644
--- a/app/node_modules/okadminview/index.js
+++ b/app/node_modules/okadminview/index.js
@@ -154,11 +154,12 @@ function OKAdminView(options) {
       if (!resource) {
         error(req, res, 404)(new Error('No such resource ' + type));
       } else {
-        var templateData = transformData(meta, resource, {});
-        view.renderResourceNew(req, res, assign(templateData, {
-          success: req.flash('success'),
-          errors: req.flash('errors'),
-        }));
+        fetchNewTemplateData(meta, resource, transformData).then(function(data) {
+          view.renderResourceNew(req, res, assign(data, {
+            success: req.flash('success'),
+            errors: req.flash('errors'),
+          }))
+        }).fail(error(req, res, 500))
       }
     });
 
@@ -280,11 +281,11 @@ function OKAdminView(options) {
 /**
  * Yields formatted template data for a single resource
  */
-function transformData(meta, resource, data) {
+function transformData(meta, spec, resource, data) {
   meta = meta || {};
   resource = resource || {};
   data = data || {};
-  var spec = Object.keys(resource.spec).reduce(function(cache, prop) {
+  var spec = Object.keys(spec).reduce(function(cache, prop) {
     var value = data[prop];
     var propSpec = cache[prop];
     // Decorate spec with actual resource values
@@ -294,7 +295,7 @@ function transformData(meta, resource, data) {
       propSpec.hidden = true;
     }
     return cache;
-  }, resource.spec);
+  }, spec);
   return {
     meta: meta,
     resource: {
@@ -340,47 +341,94 @@ function fetchIndexTemplateData(meta, queries, dashboardConfig) {
     Q.all(queries.map(function(query) {
       return query.get();
     })).then(function(results) {
-      var resources = results.reduce(function(cache, result, i) {
-        if (!result)
-          return cache;
+      var templateData = results.reduce(function(acc, result, i) {
         var resource = queries[i].resource;
         // We want the raw object spec
         var spec = resource.spec;
         var dashConf = resourceConfig[resource.type] || {}
         var groupBy = dashConf.groupBy
         var key = pluralize(resource.type)
-        cache[key] = {
+        acc[key] = {
           type: resource.type,
           spec: spec,
           data: result,
           groupBy: groupBy
         }
-        return cache;
-      }, {});
-
+        return acc
+      }, {})
       resolve({
         meta: meta,
-        resources: resources
-      });
-    }).fail(reject);
+        resources: templateData
+      })
+    }).fail(reject)
   });
 }
 
+function fetchNewTemplateData(meta, resource, transformFn) {
+  return Q.promise(function(resolve, reject) {
+    if (!resource.hasForeignKey) {
+      done({spec: resource.spec, resource: resource})
+    } else {
+      fetchForeignKeyOptions(resource).then(done).fail(reject)
+    }
+
+    function done(results) {
+      resolve(transformFn(meta, results.spec, results.resource, {}))
+    }
+  })
+}
+
 /**
  * Annotate template data with schema info
  */
-function fetchResourceTemplateData(meta, query, fn) {
-  fn = fn || function(m, r, d) { return {meta: m, resource: d}; };
+function fetchResourceTemplateData(meta, query, transformFn) {
   return Q.promise(function(resolve, reject) {
     query.get().then(function(data) {
-      if (!data) {
-        reject(new Error('No resource data'));
+      if (!data)
+        return reject(new Error('No resource data'))
+
+      var resource = query.resource
+
+      if (resource.hasForeignKey) {
+        fetchForeignKeyOptions(resource).then(done).fail(reject)
       } else {
-        var resource = query.resource;
-        resolve(fn(meta, resource, data));
+        done({spec: resource.spec, resource: resource})
       }
-    }).fail(reject);
-  });
+
+      function done(results) {
+        resolve(transformFn(meta, results.spec, results.resource, data))
+      }
+    }).fail(reject)
+  })
+}
+
+function fetchForeignKeyOptions(resource) {
+  var promises = Object.keys(resource.foreignKeys)
+      .map(fetchOptionsForKey)
+  var spec = resource.spec
+
+  return Q.all(promises).then(done)
+
+  function done() {
+    return Q.promise(function(resolve, reject) {
+      resolve({spec: spec, resource: resource})
+    })
+  }
+
+  function fetchOptionsForKey(field) {
+    var relatedResourceType = resource.foreignKeys[field]
+    return resource.related(relatedResourceType).then(fillOptions)
+
+    function fillOptions(results) {
+      return Q.promise(function(resolve, reject) {
+        spec[field].options = results.map(function(result) {
+          return result.id
+        })
+        resolve()
+      })
+    }
+  }
 }
 
+
 module.exports = OKAdminView;
-- 
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