From 58edd77428013e4df8143f4e90bea21005993e40 Mon Sep 17 00:00:00 2001
From: Josha von Gizycki <josha.von.gizycki@triology.de>
Date: Thu, 17 Jan 2019 16:43:48 +0100
Subject: [PATCH] visualisation of all instances

---
 src/wanijo/framework/view.clj       |  2 +-
 src/wanijo/visualisation/domain.clj | 15 +++++++++++++++
 src/wanijo/visualisation/routes.clj | 17 +++++++++++++++++
 src/wanijo/visualisation/viz.clj    | 27 +++++++++++++++++++++++++++
 4 files changed, 60 insertions(+), 1 deletion(-)
 create mode 100644 src/wanijo/visualisation/domain.clj

diff --git a/src/wanijo/framework/view.clj b/src/wanijo/framework/view.clj
index 3f2f887..dff4721 100644
--- a/src/wanijo/framework/view.clj
+++ b/src/wanijo/framework/view.clj
@@ -71,7 +71,7 @@
            [:section
             [:h2 [:span.__icon "▤"] "Visualisation"]
             [:ul
-             [:li [:a {:href ""}
+             [:li [:a {:href (path :vis-all-instances)}
                    "All Instances"]]]]))]
        (into [:main
               (for [msg (:flash request)]
diff --git a/src/wanijo/visualisation/domain.clj b/src/wanijo/visualisation/domain.clj
new file mode 100644
index 0000000..a7a4bbd
--- /dev/null
+++ b/src/wanijo/visualisation/domain.clj
@@ -0,0 +1,15 @@
+(ns wanijo.visualisation.domain
+  (:require [wanijo.framework.neo4j :as neo4j]))
+
+(neo4j/defquery all-instance-connections
+  "MATCH
+     (source:instance)-[:of]->(schema:schema)
+   OPTIONAL MATCH
+     (source)<-[:link_from]-(link:link)-[:link_to]->(target:instance),
+     (target)-[:of]->(target_schema:schema)
+   WHERE
+     target IS NULL OR target <> source
+   RETURN source, link, target, schema, target_schema")
+
+(defn all-instance-connections! []
+  (neo4j/exec-query! all-instance-connections {}))
diff --git a/src/wanijo/visualisation/routes.clj b/src/wanijo/visualisation/routes.clj
index 7cc7e5b..93233e5 100644
--- a/src/wanijo/visualisation/routes.clj
+++ b/src/wanijo/visualisation/routes.clj
@@ -3,12 +3,29 @@
                                     GET POST DELETE]]
             [ring.util.response :as resp]
             [wanijo.framework.routing :refer [register! path]]
+            [wanijo.framework.view :as view]
             [wanijo.instance.domain :as domain-instance]
+            [wanijo.visualisation.domain :as vis-domain]
             [wanijo.visualisation.viz :as viz]))
 
+(defn all-instances [req]
+  (view/layout!
+   :request req
+   :content
+   [[:h1 "All Instances"]
+    [:img {:src (path :vis-all-instances-img)
+           :alt "All Instances"}]]))
+
 (defroutes routes
   (GET (register! :vis-single-instance "/visualisation/instance/:uuid")
        [uuid]
        {:body (viz/single-instance
                (domain-instance/full-instance-by-uuid! uuid))
+        :headers {"Content-Type" "image/svg+xml"}})
+  (GET (register! :vis-all-instances "/visualisation/all-instances")
+       [:as req]
+       (all-instances req))
+  (GET (register! :vis-all-instances-img "/visualisation/all-instances.svg")
+       []
+       {:body (viz/all-instances (vis-domain/all-instance-connections!))
         :headers {"Content-Type" "image/svg+xml"}}))
diff --git a/src/wanijo/visualisation/viz.clj b/src/wanijo/visualisation/viz.clj
index ec8ed3d..ebcd135 100644
--- a/src/wanijo/visualisation/viz.clj
+++ b/src/wanijo/visualisation/viz.clj
@@ -32,3 +32,30 @@
         dot/digraph
         dot/dot
         (doro-jvm/render {:format :svg}))))
+
+(defn all-instances [instances]
+  (let [labelfn #(str (:name %1)
+                      "\n"
+                      (:name %2))
+        sources (map #(vector (-> % :source :uuid)
+                              {:label (labelfn (:source %)
+                                               (:schema %))})
+                     instances)
+        linked (filter :link instances)
+        links (map #(vector (-> % :source :uuid)
+                            :>
+                            (-> % :target :uuid)
+                            {:label (-> % :link :name)})
+                   linked)
+        targets (map #(vector (-> % :target :uuid)
+                              {:label (labelfn (:target %)
+                                               (:target_schema %))})
+                     linked)]
+    (-> [{:forcelabels "true"
+          :rankdir "LR"}]
+        (into sources)
+        (into targets)
+        (into links)
+        dot/digraph
+        dot/dot
+        (doro-jvm/render {:format :svg}))))