Process comment markers server-side.

Replace @POS@, @POSITION@ and @DMS@ in the remarks
with the event's position (sexagesimal degrees for
the last one).

lib/www/server/lib/db/event/list.js

@@ -1,5 +1,22 @@
 const { setSurvey } = require('../connection');
 
+const { geometryAsString } = require('../../utils');
+
+
+function replaceMarkers (item, opts={}) {
+	const textkey = opts.text || "remarks";
+	
+	const text = item[textkey];
+	
+	if (text && typeof text === "string") {
+		item[textkey] = text
+		.replace(/@POS(ITION)?@/g, geometryAsString(item, opts) || "(position unknown)")
+		.replace(/@DMS@/g, geometryAsString(item, {...opts, dms:true}) || "(position unknown)")
+	}
+	
+	return item;
+}
+
 async function list (projectId, opts = {}) {
 	const client = await setSurvey(projectId);
 
@@ -29,7 +46,7 @@ async function list (projectId, opts = {}) {
 
 	const res = await client.query(text, filter[1]);
 	client.release();
-	return res.rows;
+	return res.rows.map(i => replaceMarkers(i));
 }
 
 module.exports = list;

lib/www/server/lib/utils/dms.js

@@ -0,0 +1,36 @@
+ 
+function dms (lat, lon) {
+  const λh = lat < 0 ? "S" : "N";
+  const φh = lon < 0 ? "W" : "E";
+  
+  const λn = Math.abs(lat);
+  const φn = Math.abs(lon);
+  
+  const λi = Math.trunc(λn);
+  const φi = Math.trunc(φn);
+  
+  const λf = λn - λi;
+  const φf = φn - φi;
+  
+  const λs = ((λf*3600)%60).toFixed(1);
+  const φs = ((φf*3600)%60).toFixed(1);
+  
+  const λm = Math.trunc(λf*60);
+  const φm = Math.trunc(φf*60);
+  
+  const λ =
+    String(λi).padStart(2, "0") + "°" +
+    String(λm).padStart(2, "0") + "'" +
+    String(λs).padStart(4, "0") + '" ' +
+    λh;
+  
+  const φ =
+    String(φi).padStart(3, "0") + "°" +
+    String(φm).padStart(2, "0") + "'" +
+    String(φs).padStart(4, "0") + '" ' +
+    φh;
+  
+  return λ+" "+φ;
+}
+
+module.exports = dms;

lib/www/server/lib/utils/geometryAsString.js

@@ -0,0 +1,36 @@
+
+const dms = require('./dms');
+
+function geometryAsString (item, opts = {}) {
+  const key = "key" in opts ? opts.key : "geometry";
+  const formatDMS = opts.dms;
+  
+  let str = "";
+  
+  if (key in item) {
+    const geometry = item[key];
+    if (geometry && "coordinates" in geometry) {
+      if (geometry.type == "Point") {
+        if (formatDMS) {
+          str = dms(geometry.coordinates[1], geometry.coordinates[0]);
+        } else {
+          str = `${geometry.coordinates[1].toFixed(6)}, ${geometry.coordinates[0].toFixed(6)}`;
+        }
+      }
+      
+      if (str) {
+        if (opts.url) {
+          if (typeof opts.url === 'string') {
+            str = `[${str}](${opts.url.replace("$x", geometry.coordinates[0]).replace("$y", geometry.coordinates[1])})`;
+          } else {
+             str = `[${str}](geo:${geometry.coordinates[0]},${geometry.coordinates[1]})`;
+          }
+        }
+      }
+    }
+  }
+  
+  return str;
+}
+
+module.exports = geometryAsString;

lib/www/server/lib/utils/index.js

@@ -0,0 +1,5 @@
+ 
+module.exports = {
+	geometryAsString: require('./geometryAsString'),
+	dms: require('./dms')
+};