Rework comparison components.

More focused on error ellipses.

etc/db/upgrades/upgrade41-v0.6.3-add-comparisons.sql

@@ -0,0 +1,109 @@
+-- Add procedure to decimate old nav data
+--
+-- New schema version: 0.6.3
+--
+-- ATTENTION:
+--
+-- ENSURE YOU HAVE BACKED UP THE DATABASE BEFORE RUNNING THIS SCRIPT.
+--
+--
+-- NOTE: This upgrade creates a new schema called `comparisons`.
+-- NOTE: Each application starts a transaction, which must be committed
+-- or rolled back.
+--
+-- This update adds a `comparisons` table to a `comparisons` schema.
+-- The `comparisons.comparisons` table holds 4D prospect comparison data.
+--
+-- To apply, run as the dougal user:
+--
+-- psql <<EOF
+-- \i $THIS_FILE
+-- COMMIT;
+-- EOF
+--
+-- NOTE: It can be applied multiple times without ill effect.
+--
+
+BEGIN;
+
+CREATE OR REPLACE PROCEDURE pg_temp.show_notice (notice text) AS $$
+BEGIN
+	RAISE NOTICE '%', notice;
+END;
+$$ LANGUAGE plpgsql;
+
+CREATE OR REPLACE PROCEDURE pg_temp.upgrade_database () AS $outer$
+BEGIN
+
+	RAISE NOTICE 'Updating schema %', 'public';
+	SET search_path TO public;
+
+	-- BEGIN
+
+	CREATE SCHEMA IF NOT EXISTS comparisons
+		AUTHORIZATION postgres;
+
+	COMMENT ON SCHEMA comparisons
+		IS 'Holds 4D comparison data and logic';
+
+	CREATE TABLE IF NOT EXISTS comparisons.comparisons
+	(
+		type text COLLATE pg_catalog."default" NOT NULL,
+		baseline_pid text COLLATE pg_catalog."default" NOT NULL,
+		monitor_pid text COLLATE pg_catalog."default" NOT NULL,
+		data bytea,
+		meta jsonb NOT NULL DEFAULT '{}'::jsonb,
+		CONSTRAINT comparisons_pkey PRIMARY KEY (baseline_pid, monitor_pid, type)
+	)
+
+	TABLESPACE pg_default;
+
+	ALTER TABLE IF EXISTS comparisons.comparisons
+		OWNER to postgres;
+
+	-- END
+
+END;
+$outer$ LANGUAGE plpgsql;
+
+CREATE OR REPLACE PROCEDURE pg_temp.upgrade () AS $outer$
+DECLARE
+	row RECORD;
+	current_db_version TEXT;
+BEGIN
+
+	SELECT value->>'db_schema' INTO current_db_version FROM public.info WHERE key = 'version';
+
+	IF current_db_version >= '0.6.3' THEN
+		RAISE EXCEPTION
+			USING MESSAGE='Patch already applied';
+	END IF;
+
+	IF current_db_version != '0.6.2' THEN
+		RAISE EXCEPTION
+			USING MESSAGE='Invalid database version: ' || current_db_version,
+				HINT='Ensure all previous patches have been applied.';
+	END IF;
+
+	CALL pg_temp.upgrade_database();
+END;
+$outer$ LANGUAGE plpgsql;
+
+CALL pg_temp.upgrade();
+
+CALL pg_temp.show_notice('Cleaning up');
+DROP PROCEDURE pg_temp.upgrade_database ();
+DROP PROCEDURE pg_temp.upgrade ();
+
+CALL pg_temp.show_notice('Updating db_schema version');
+INSERT INTO public.info VALUES ('version', '{"db_schema": "0.6.3"}')
+ON CONFLICT (key) DO UPDATE
+	SET value = public.info.value || '{"db_schema": "0.6.3"}' WHERE public.info.key = 'version';
+
+
+CALL pg_temp.show_notice('All done. You may now run "COMMIT;" to persist the changes');
+DROP PROCEDURE pg_temp.show_notice (notice text);
+
+--
+--NOTE Run `COMMIT;` now if all went well
+--

etc/db/upgrades/upgrade42-v0.6.4-notify-exclude-columns.sql

@@ -0,0 +1,169 @@
+-- Add procedure to decimate old nav data
+--
+-- New schema version: 0.6.4
+--
+-- ATTENTION:
+--
+-- ENSURE YOU HAVE BACKED UP THE DATABASE BEFORE RUNNING THIS SCRIPT.
+--
+--
+-- NOTE: This upgrade affects the public schema only.
+-- NOTE: Each application starts a transaction, which must be committed
+-- or rolled back.
+--
+-- This update modifies notify() to accept, as optional arguments, the
+-- names of columns that are to be *excluded* from the notification.
+-- It is intended for tables with large columns which are however of
+-- no particular interest in a notification.
+--
+-- To apply, run as the dougal user:
+--
+-- psql <<EOF
+-- \i $THIS_FILE
+-- COMMIT;
+-- EOF
+--
+-- NOTE: It can be applied multiple times without ill effect.
+--
+
+BEGIN;
+
+CREATE OR REPLACE PROCEDURE pg_temp.show_notice (notice text) AS $$
+BEGIN
+	RAISE NOTICE '%', notice;
+END;
+$$ LANGUAGE plpgsql;
+
+CREATE OR REPLACE PROCEDURE pg_temp.upgrade_database () AS $outer$
+BEGIN
+
+	RAISE NOTICE 'Updating schema %', 'public';
+	SET search_path TO public;
+
+	-- BEGIN
+
+	CREATE OR REPLACE FUNCTION public.notify()
+		RETURNS trigger
+		LANGUAGE 'plpgsql'
+		COST 100
+		VOLATILE NOT LEAKPROOF
+	AS $BODY$
+		DECLARE
+		channel text := TG_ARGV[0];
+		pid text;
+		payload text;
+		notification text;
+		payload_id integer;
+		old_json jsonb;
+		new_json jsonb;
+		excluded_col text;
+		i integer;
+		BEGIN
+
+		-- Fetch pid
+		SELECT projects.pid INTO pid FROM projects WHERE schema = TG_TABLE_SCHEMA;
+
+		-- Build old and new as jsonb, excluding specified columns if provided
+		IF OLD IS NOT NULL THEN
+			old_json := row_to_json(OLD)::jsonb;
+			FOR i IN 1 .. TG_NARGS - 1 LOOP
+				excluded_col := TG_ARGV[i];
+				old_json := old_json - excluded_col;
+			END LOOP;
+		ELSE
+			old_json := NULL;
+		END IF;
+
+		IF NEW IS NOT NULL THEN
+			new_json := row_to_json(NEW)::jsonb;
+			FOR i IN 1 .. TG_NARGS - 1 LOOP
+				excluded_col := TG_ARGV[i];
+				new_json := new_json - excluded_col;
+			END LOOP;
+		ELSE
+			new_json := NULL;
+		END IF;
+
+		-- Build payload
+		payload := json_build_object(
+			'tstamp', CURRENT_TIMESTAMP,
+			'operation', TG_OP,
+			'schema', TG_TABLE_SCHEMA,
+			'table', TG_TABLE_NAME,
+			'old', old_json,
+			'new', new_json,
+			'pid', pid
+		)::text;
+
+		-- Handle large payloads
+		IF octet_length(payload) < 1000 THEN
+			PERFORM pg_notify(channel, payload);
+		ELSE
+			-- Store large payload and notify with ID (as before)
+			INSERT INTO notify_payloads (payload) VALUES (payload) RETURNING id INTO payload_id;
+
+			notification := json_build_object(
+				'tstamp', CURRENT_TIMESTAMP,
+				'operation', TG_OP,
+				'schema', TG_TABLE_SCHEMA,
+				'table', TG_TABLE_NAME,
+				'pid', pid,
+				'payload_id', payload_id
+			)::text;
+
+			PERFORM pg_notify(channel, notification);
+			RAISE INFO 'Payload over limit';
+		END IF;
+		RETURN NULL;
+		END;
+	$BODY$;
+
+	ALTER FUNCTION public.notify()
+		OWNER TO postgres;
+
+	-- END
+
+END;
+$outer$ LANGUAGE plpgsql;
+
+CREATE OR REPLACE PROCEDURE pg_temp.upgrade () AS $outer$
+DECLARE
+	row RECORD;
+	current_db_version TEXT;
+BEGIN
+
+	SELECT value->>'db_schema' INTO current_db_version FROM public.info WHERE key = 'version';
+
+	IF current_db_version >= '0.6.4' THEN
+		RAISE EXCEPTION
+			USING MESSAGE='Patch already applied';
+	END IF;
+
+	IF current_db_version != '0.6.3' THEN
+		RAISE EXCEPTION
+			USING MESSAGE='Invalid database version: ' || current_db_version,
+				HINT='Ensure all previous patches have been applied.';
+	END IF;
+
+	CALL pg_temp.upgrade_database();
+END;
+$outer$ LANGUAGE plpgsql;
+
+CALL pg_temp.upgrade();
+
+CALL pg_temp.show_notice('Cleaning up');
+DROP PROCEDURE pg_temp.upgrade_database ();
+DROP PROCEDURE pg_temp.upgrade ();
+
+CALL pg_temp.show_notice('Updating db_schema version');
+INSERT INTO public.info VALUES ('version', '{"db_schema": "0.6.4"}')
+ON CONFLICT (key) DO UPDATE
+	SET value = public.info.value || '{"db_schema": "0.6.4"}' WHERE public.info.key = 'version';
+
+
+CALL pg_temp.show_notice('All done. You may now run "COMMIT;" to persist the changes');
+DROP PROCEDURE pg_temp.show_notice (notice text);
+
+--
+--NOTE Run `COMMIT;` now if all went well
+--

etc/db/upgrades/upgrade43-v0.6.5-add-comparisons-notification-channel.sql

@@ -0,0 +1,96 @@
+-- Add procedure to decimate old nav data
+--
+-- New schema version: 0.6.5
+--
+-- ATTENTION:
+--
+-- ENSURE YOU HAVE BACKED UP THE DATABASE BEFORE RUNNING THIS SCRIPT.
+--
+--
+-- NOTE: This upgrade affects the public schema only.
+-- NOTE: Each application starts a transaction, which must be committed
+-- or rolled back.
+--
+-- This update modifies notify() to accept, as optional arguments, the
+-- names of columns that are to be *excluded* from the notification.
+-- It is intended for tables with large columns which are however of
+-- no particular interest in a notification.
+--
+-- To apply, run as the dougal user:
+--
+-- psql <<EOF
+-- \i $THIS_FILE
+-- COMMIT;
+-- EOF
+--
+-- NOTE: It can be applied multiple times without ill effect.
+--
+
+BEGIN;
+
+CREATE OR REPLACE PROCEDURE pg_temp.show_notice (notice text) AS $$
+BEGIN
+	RAISE NOTICE '%', notice;
+END;
+$$ LANGUAGE plpgsql;
+
+CREATE OR REPLACE PROCEDURE pg_temp.upgrade_database () AS $outer$
+BEGIN
+
+	RAISE NOTICE 'Updating schema %', 'public';
+	SET search_path TO public;
+
+	-- BEGIN
+
+	CREATE OR REPLACE TRIGGER comparisons_tg
+		AFTER INSERT OR DELETE OR UPDATE
+		ON comparisons.comparisons
+		FOR EACH ROW
+		EXECUTE FUNCTION public.notify('comparisons', 'data');
+
+	-- END
+
+END;
+$outer$ LANGUAGE plpgsql;
+
+CREATE OR REPLACE PROCEDURE pg_temp.upgrade () AS $outer$
+DECLARE
+	row RECORD;
+	current_db_version TEXT;
+BEGIN
+
+	SELECT value->>'db_schema' INTO current_db_version FROM public.info WHERE key = 'version';
+
+	IF current_db_version >= '0.6.5' THEN
+		RAISE EXCEPTION
+			USING MESSAGE='Patch already applied';
+	END IF;
+
+	IF current_db_version != '0.6.4' THEN
+		RAISE EXCEPTION
+			USING MESSAGE='Invalid database version: ' || current_db_version,
+				HINT='Ensure all previous patches have been applied.';
+	END IF;
+
+	CALL pg_temp.upgrade_database();
+END;
+$outer$ LANGUAGE plpgsql;
+
+CALL pg_temp.upgrade();
+
+CALL pg_temp.show_notice('Cleaning up');
+DROP PROCEDURE pg_temp.upgrade_database ();
+DROP PROCEDURE pg_temp.upgrade ();
+
+CALL pg_temp.show_notice('Updating db_schema version');
+INSERT INTO public.info VALUES ('version', '{"db_schema": "0.6.5"}')
+ON CONFLICT (key) DO UPDATE
+	SET value = public.info.value || '{"db_schema": "0.6.5"}' WHERE public.info.key = 'version';
+
+
+CALL pg_temp.show_notice('All done. You may now run "COMMIT;" to persist the changes');
+DROP PROCEDURE pg_temp.show_notice (notice text);
+
+--
+--NOTE Run `COMMIT;` now if all went well
+--

lib/www/client/source/src/components/group-comparison-summary.vue

@@ -10,8 +10,8 @@
               <thead>
                 <tr>
                   <th>Metric</th>
-                  <th>X (m)</th>
-                  <th>Y (m)</th>
+                  <th>I (m)</th>
+                  <th>J (m)</th>
                 </tr>
               </thead>
               <tbody>
@@ -34,21 +34,24 @@
             </template>
           </v-simple-table>
 
-          <h3 class="mt-4">Counts</h3>
+          <h3 class="mt-4">Error distribution</h3>
           <ul>
-            <li>Common Points: {{ comparison.common }}</li>
-            <li>Comparison Length: {{ comparison.length }}</li>
-            <li>Baseline Length: {{ comparison.baselineLength }} (Unique: {{ comparison.baselineUniqueLength }})</li>
-            <li>Monitor Length: {{ comparison.monitorLength }} (Unique: {{ comparison.monitorUniqueLength }})</li>
-            <li>Compared Points: {{ comparison.compared }}</li>
+            <li title="Relative to I-axis positive direction">Primary Direction: {{ (comparison.primaryDirection * 180 / Math.PI).toFixed(2) }}°</li>
+            <li>Anisotropy: {{ comparison.anisotropy.toFixed(2) }}</li>
+            <li title="Length of the semi-major axis of the error ellipse">Semi-Major Axis: {{ semiMajorAxis.toFixed(2) }} m</li>
+            <li title="Length of the semi-minor axis of the error ellipse">Semi-Minor Axis: {{ semiMinorAxis.toFixed(2) }} m</li>
+            <li title="Area of the error ellipse">Error Ellipse Area: {{ ellipseArea.toFixed(2) }} m²</li>
           </ul>
 
-          <h3 class="mt-4">Other Metrics</h3>
+          <h3 class="mt-4">Counts</h3>
           <ul>
-            <li>Anisotropy: {{ comparison.anisotropy.toFixed(2) }}</li>
-            <li title="Relative to I-axis positive direction">Primary Direction: {{ (comparison.primaryDirection * 180 / Math.PI).toFixed(2) }}°</li>
-            <li>Timestamp: {{ new Date(comparison.tstamp).toLocaleString() }}</li>
+            <li title="Unique line / point pairs found in both projects">Common Points: {{ comparison.common }}</li>
+            <li title="Total number of points compared, including reshoots, infills, etc.">Comparison Length: {{ comparison.length }}</li>
+            <li title="Number of points in the baseline project">Baseline Points: {{ comparison.baselineLength }} (Unique: {{ comparison.baselineUniqueLength }})</li>
+            <li title="Number of points in the monitor project">Monitor Points: {{ comparison.monitorLength }} (Unique: {{ comparison.monitorUniqueLength }})</li>
           </ul>
+
+          <p class="mt-3" title="Date and time when the comparison was last performed">Computation timestamp: {{ new Date(comparison.tstamp).toLocaleString() }}</p>
         </v-col>
 
         <v-col cols="12" md="6">
@@ -139,10 +142,34 @@ export default {
         Math.abs(this.comparison['μ'][0]),
         Math.abs(this.comparison['μ'][1])
       );
-      const maxExtent = maxMu + 3 * maxSigma;
+      //const maxExtent = maxMu + 3 * maxSigma;
+      const maxExtent = 20;
       return 100 / maxExtent; // Adjust scale to fit within ~200 pixels diameter
     },
 
+    ellipseArea () {
+      if (!this.comparison) return 0;
+      const a = Math.sqrt(this.comparison.eigenvalues[0]);
+      const b = Math.sqrt(this.comparison.eigenvalues[1]);
+      return Math.PI * a * b;
+    },
+
+    semiMajorAxis () {
+      if (!this.comparison) return 0;
+      return Math.max(
+        Math.sqrt(this.comparison.eigenvalues[0]),
+        Math.sqrt(this.comparison.eigenvalues[1])
+      );
+    },
+
+    semiMinorAxis () {
+      if (!this.comparison) return 0;
+      return Math.min(
+        Math.sqrt(this.comparison.eigenvalues[0]),
+        Math.sqrt(this.comparison.eigenvalues[1])
+      );
+    },
+
     meanX () {
       return this.comparison ? this.comparison['μ'][0] : 0;
     },

lib/www/client/source/src/components/group-repeatability-summary.vue

@@ -2,7 +2,7 @@
   <v-card class="ma-1">
     <v-card-title>Group Repeatability Summary</v-card-title>
     <v-card-text>
-      <p>Inline standard deviation (σ_x) for each baseline-monitor pair. Lower values indicate better repeatability. Colors range from green (best) to red (worst).</p>
+      <p>Error ellipse area for each baseline-monitor pair. Lower values indicate better repeatability. Colors range from green (best) to red (worst).</p>
       <v-simple-table dense>
         <thead>
           <tr>
@@ -17,18 +17,19 @@
               <v-tooltip v-if="colIndex > rowIndex" top>
                 <template v-slot:activator="{ on, attrs }">
                   <div
-                    :style="{ backgroundColor: getSigmaXColor(baselineProject.pid, monitorProject.pid), color: 'white', textAlign: 'center', padding: '4px' }"
+                    :style="{ backgroundColor: getEllipseAreaColor(baselineProject.pid, monitorProject.pid), color: 'white', textAlign: 'center', padding: '4px' }"
                     v-bind="attrs"
                     v-on="on"
                     @click="emitInput(baselineProject, monitorProject)"
                   >
-                    {{ formatSigmaX(baselineProject.pid, monitorProject.pid) }}
+                    {{ formatEllipseArea(baselineProject.pid, monitorProject.pid) }}
                   </div>
                 </template>
                 <span v-if="getComp(baselineProject.pid, monitorProject.pid)">
-                  <div>σ_x: {{ getComp(baselineProject.pid, monitorProject.pid).meta['σ'][0].toFixed(2) }} m</div>
-                  <div>σ_y: {{ getComp(baselineProject.pid, monitorProject.pid).meta['σ'][1].toFixed(2) }} m</div>
+                  <div>σ_i: {{ getComp(baselineProject.pid, monitorProject.pid).meta['σ'][0].toFixed(2) }} m</div>
+                  <div>σ_j: {{ getComp(baselineProject.pid, monitorProject.pid).meta['σ'][1].toFixed(2) }} m</div>
                   <div>Anisotropy: {{ getComp(baselineProject.pid, monitorProject.pid).meta.anisotropy.toFixed(0) }}</div>
+                  <div>Ellipse Area: {{ getEllipseArea(baselineProject.pid, monitorProject.pid).toFixed(2) }} m²</div>
                   <div>Primary Direction: {{ formatPrimaryDirection(getComp(baselineProject.pid, monitorProject.pid)) }}°</div>
                 </span>
               </v-tooltip>
@@ -64,30 +65,42 @@ export default {
     compMap () {
       return new Map(this.comparisons.map(c => [`${c.baseline_pid}-${c.monitor_pid}`, c]));
     },
-    minSigmaX () {
+    minEllipseArea () {
       if (!this.comparisons.length) return 0;
-      return Math.min(...this.comparisons.map(c => c.meta['σ'][0]));
+      return Math.min(...this.comparisons.map(c => {
+        const a = Math.sqrt(c.meta.eigenvalues[0]);
+        const b = Math.sqrt(c.meta.eigenvalues[1]);
+        return Math.PI * a * b;
+      }));
     },
-    maxSigmaX () {
+    maxEllipseArea () {
       if (!this.comparisons.length) return 0;
-      return Math.max(...this.comparisons.map(c => c.meta['σ'][0]));
+      return Math.max(...this.comparisons.map(c => {
+        const a = Math.sqrt(c.meta.eigenvalues[0]);
+        const b = Math.sqrt(c.meta.eigenvalues[1]);
+        return Math.PI * a * b;
+      }));
     }
   },
   methods: {
     getComp (basePid, monPid) {
       return this.compMap.get(`${basePid}-${monPid}`);
     },
-    getSigmaX (basePid, monPid) {
-      return this.getComp(basePid, monPid)?.meta?.['σ']?.[0] ?? null;
+    getEllipseArea (basePid, monPid) {
+      const comp = this.getComp(basePid, monPid);
+      if (!comp) return null;
+      const a = Math.sqrt(comp.meta.eigenvalues[0]);
+      const b = Math.sqrt(comp.meta.eigenvalues[1]);
+      return Math.PI * a * b;
     },
-    formatSigmaX (basePid, monPid) {
-      const val = this.getSigmaX(basePid, monPid);
+    formatEllipseArea (basePid, monPid) {
+      const val = this.getEllipseArea(basePid, monPid);
       return val !== null ? val.toFixed(1) : '';
     },
-    getSigmaXColor (basePid, monPid) {
-      const val = this.getSigmaX(basePid, monPid);
+    getEllipseAreaColor (basePid, monPid) {
+      const val = this.getEllipseArea(basePid, monPid);
       if (val === null) return '';
-      const ratio = (val - this.minSigmaX) / (this.maxSigmaX - this.minSigmaX);
+      const ratio = (val - this.minEllipseArea) / (this.maxEllipseArea - this.minEllipseArea);
       const hue = (1 - ratio) * 120;
       return `hsl(${hue}, 70%, 70%)`;
     },

lib/www/client/source/src/views/Group.vue

@@ -1,5 +1,27 @@
 <template>
   <v-container fluid fill-height class="ma-0 pa-0">
+
+    <v-overlay :value="loading && !comparisons.length" absolute>
+      <v-progress-circular
+        indeterminate
+        size="64"
+      ></v-progress-circular>
+    </v-overlay>
+
+    <v-overlay :value="!loading && !groupFound" absolute opacity="0.8">
+      <v-row justify="center">
+        <v-alert
+          type="error"
+        >
+          Group not found
+        </v-alert>
+      </v-row>
+      <v-row justify="center">
+        <v-btn color="primary" @click="refreshProjects">Retry</v-btn>
+      </v-row>
+    </v-overlay>
+
+
     <v-row no-gutters align="stretch" class="fill-height">
       <v-col cols="12" v-if="groupFound">
 
@@ -7,7 +29,6 @@
           :headers="projectHeaders"
           :items="projects"
           dense
-          hide-default-footer
         >
 
           <template v-slot:item.baseline="{item, value, index}">
@@ -51,6 +72,15 @@
             {{ (value/1000).toFixed(1) }} km
           </template>
 
+          <template v-slot:footer.prepend>
+            <v-btn v-if="comparison"
+              text
+              color="primary"
+              title="Back to summary"
+              @click="clearComparison"
+            >Back</v-btn>
+          </template>
+
         </v-data-table>
 
 <!-- BEGIN TEST -->
@@ -206,7 +236,13 @@ export default {
       }
     },
 
+    clearComparison () {
+      this.baseline = null;
+      this.monitor = null;
+    },
+
     setComparison (baseline, monitor) {
+      this.clearComparison();
       this.setBaseline(baseline);
       this.setMonitor(monitor);
     },
@@ -216,6 +252,14 @@ export default {
       this.comparisons = await this.api([url]);
     },
 
+    // TODO Should this go in a Vuex action rather?
+    async refreshComparisons () {
+      await this.getGroups();
+      if (this.groupFound) {
+        await this.getComparisons();
+      }
+    },
+
     /*
     async getComparison () {
       if (this.baseline && this.monitor) {
@@ -228,27 +272,34 @@ export default {
     },
     */
 
-    ...mapActions(["api", "getGroups"])
+    handleComparisons (context, {payload}) {
+      this.refreshComparisons();
+    },
+
+    registerNotificationHandlers (action = "registerHandler") {
+
+      this.$store.dispatch(action, {
+        table: 'comparisons',
+        handler: this.handleComparisons
+      });
+
+    },
+
+    unregisterNotificationHandlers () {
+      return this.registerNotificationHandlers("unregisterHandler");
+    },
+
+
+    ...mapActions(["api", "getGroups", "refreshProjects"])
   },
 
   async mounted () {
-    await this.getGroups();
-    if (this.groupFound) {
-      this.getComparisons();
-      /*
-      this.registerNotificationHandlers();
-
-      this.refreshLines();
-      this.refreshSequences();
-      this.refreshEvents();
-      this.refreshLabels();
-      this.refreshPlan();
-    */
-    }
+    this.registerNotificationHandlers();
+    this.refreshComparisons()
   },
 
   beforeDestroy () {
-    //this.unregisterNotificationHandlers();
+    this.unregisterNotificationHandlers();
   }
 
 

lib/www/server/api/index.js

@@ -365,9 +365,9 @@ app.map({
 	// FIXME no authentication yet!
 
 	'/comparison/group': {
-		get: [ mw.comparisons.groups.list ],
+		get: [ mw.etag.noSave, mw.comparisons.groups.list ],
 		'/:group': {
-			get: [ mw.comparisons.groups.get ],
+			get: [ mw.etag.noSave, mw.comparisons.groups.get ],
 		},
 	},
 

lib/www/server/lib/comparisons/geometric-differences.js

@@ -159,6 +159,12 @@ async function save (baselineProjectID, monitorProjectID, bundle, meta) {
 	}
 }
 
+
+async function saveSample (baselineProjectID, monitorProjectID, opts = {}) {
+	DEBUG("Not bothering to save samples. This feature will be removed.");
+}
+
+/*
 async function saveSample (baselineProjectID, monitorProjectID, opts = {}) {
 	let sample = opts.sample;
 	let populationStats = opts.populationStats;
@@ -213,6 +219,7 @@ async function saveSample (baselineProjectID, monitorProjectID, opts = {}) {
 		client.release();
 	}
 }
+*/
 
 async function get (baselineProjectID, monitorProjectID, type = 'geometric_difference') {
 
@@ -439,6 +446,14 @@ async function saveGroup (group, opts = {}) {
 
 		for (const [ baselineProjectID, monitorProjectID ] of combinations(pids, 2)) {
 			try {
+				if (!opts.overwrite) {
+					const exists = await get(baselineProjectID, monitorProjectID);
+					if (exists) {
+						DEBUG("Not overwriting existing comparison between %s and %s. Skipping", baselineProjectID, monitorProjectID);
+						continue;
+					}
+				}
+
 				const isSaved = await save(baselineProjectID, monitorProjectID);
 				if (isSaved) {
 					await saveSample(baselineProjectID, monitorProjectID, opts.sampleOpts);

lib/www/server/lib/comparisons/pca.js

@@ -15,9 +15,12 @@ function computePCA(deviations) {
 	// Compute mean for centering (1 x 2 matrix)
 	const mean = math.mean(D, 0);
 
-	// Explicitly repeat mean to match D's shape (n x 2)
+	// Manually repeat-mean to match D's shape (n x 2)
 	const n = deviationMatrix.length;
-	const meanRepeated = math.repmat(mean, n, 1);
+	const meanArr = mean.toArray();
+	const meanRepeated = math.matrix(
+		Array(n).fill().map(() => [meanArr[0], meanArr[1]])
+	);
 
 	// Center the data
 	const centered = math.subtract(D, meanRepeated);

lib/www/server/lib/db/channels.js

@@ -10,5 +10,6 @@ module.exports = [
 	"planned_lines",
 	"raw_lines", "raw_shots",
 	"final_lines", "final_shots", "info",
-	"queue_items"
+	"queue_items",
+	"comparisons",
 ];