Identify which faces need to have distances calculated

Signed-off-by: James Ketrenos <james_gitlab@ketrenos.com>

server/face-recognizer.js

@@ -143,6 +143,27 @@ faceapi.nets.ssdMobilenetv1.loadFromDisk('./models')
         concurrency: maxConcurrency
       });
     });
+  }).then(() => {
+    console.log("Looking for face distances that need to be updated.");
+
+    return photoDB.sequelize.query("SELECT id FROM faces ORDER BY id DESC LIMIT 1", {
+        type: photoDB.sequelize.QueryTypes.SELECT
+      }
+    }).then((results) => {
+      if (!results.length) {
+        console.log("No faces exist yet to generate distances.");
+        return;
+      }
+      const maxId = results[0].id;
+      return photoDB.sequelize.query("SELECT id FROM faces WHERE lastComparedId<:maxId OR lastComparedId IS NULL", {
+        replacements: {
+          maxId: maxId
+        },
+        type: photoDB.sequelize.QueryTypes.SELECT
+      }).then((results) => {
+        console.log(`${results.length} faces need to be updated.`);
+      });
+    });
   }).then(() => {
     console.log("Face detection scanning completed.");
   }).catch((error) => {