Backend: Add metrics & text index

Signed-off-by: Fred Boniface <fred@fjla.uk>

UpNext.md

@@ -5,6 +5,7 @@
 * Alerts box should not be clickable, bar should be.
 * Enable text search for `locationName` on find-code page.
 * Responsive text sizes for boards.
+* Build metrics page
 
 ### In Progress:
 
@@ -20,11 +21,13 @@
 * Add Gitea Issue API
 * Issue page: Check for success and then redirect to /.
 * Add success test for Gitea Issue API and send the result onto the client.
+* DB Indexes:
+    - "stations": 3ALPHA, STANOX, TIPLOC
+    - "corpus": 3ALPHA, NLC
 
 ## Backend:
 
-* DB Indexes:
-    - "stations": 3ALPHA, STANOX, TIPLOC
-    - "corpus": 3ALPHA, NLC, NLCDESC(TEXT)
+* DB Indexes:.
+    - "corpus": NLCDESC(TEXT)
 * Rewrite sanitizing functions to remove external dependancy.
 * Undo changed to make everything an array - frontend code to handle this.

src/controllers/list.controllers.js

@@ -18,7 +18,17 @@ async function getCorpus(req, res, next){
     }
 }
 
+async function hits(req, res, next) {
+    try {
+        res.json(await list.hits())
+    } catch (err) {
+        console.error(`Controller Error`, err);
+        next(err);
+    }
+}
+
 module.exports = {
     getStations,
-    getCorpus
+    getCorpus,
+    hits
 }

src/routes/list.routes.js

@@ -16,5 +16,6 @@ const listController = require('../controllers/list.controllers');
 
 router.get('/stations', listController.getStations);
 router.get('/corpus', listController.getCorpus);
+router.get('/hits', listController.hits)
 
 module.exports = router;

src/services/dbAccess.services.js

@@ -78,19 +78,53 @@ async function query(collection, query){
     return (await qcursor.toArray());
 }
 
-async function ensureIndex(col, field) {
+async function ensureIndex(col, field, text) {
     await client.connect();
+    if (!text) {
         log.out(`dbAccess.ensureIndex: Creating index in collection ${col} for field ${field}`)
-    let res = await db.createIndex(col, field);
+        db.createIndex(col, field);
+    } else {
+        log.out(`dbAccess.ensureIndex: Creating text index in collection ${col} for field ${field}`)
+        let idx = {}
+        idx[field] = "text";
+        db.createIndex(col, idx);
+    }
     log.out(`dbAccess.ensureIndex: Index created`);
     return;
 }
 
+async function increment(target) {
+    await client.connect();
+    let col = db.collection("meta");
+    let update = {}
+    update[target] = 1
+    col.updateOne({target: "ext_api"}, {$inc:update})
+    return;
+}
+
+async function createCount() {
+    await client.connect();
+    let col = db.collection("meta");
+    var filter = {type: "count", target: "ext_api"};
+    var update = {$set:{since: new Date, type: "count", target: "ext_api"}};
+    var options = {upsert: true};  // If document isn't present will insert.
+    try {
+        var result = await col.updateOne(filter,update,options)
+        log.out(`dbAccessServices.updateMeta: ${JSON.stringify(result)}`)
+        log.out(`dbAccessServices.updateMeta: count meta added updated`)
+    } catch (err) {
+        log.out(`dbAccessServices.updateMeta: Unable to add count`)
+        log.out(err)
+    }
+}
+
 module.exports = {
     putCorpus,
     putStations,
     dropCollection,
     updateMeta,
     query,
-    ensureIndex
+    ensureIndex,
+    increment,
+    createCount
 }

src/services/ldb.services.js

@@ -11,6 +11,7 @@ const log  = require('../utils/log.utils');          // Log Helper
 const ldb  = require('ldbs-json')
 const util = require('../utils/ldb.utils')
 const san  = require('../utils/sanitizer.utils')
+const db   = require('../services/dbAccess.services')
 
 const ldbKey   = process.env.OWL_LDB_KEY
 const ldbsvKey = process.env.OWL_LDB_SVKEY
@@ -22,6 +23,7 @@ async function get(body, id){
         var crs = obj[0]['3ALPHA'];
         log.out(`ldbService.get: Determined CRS for lookup to be: ${crs}`);
         var data = await arrDepBoard(crs);
+        db.increment("ldbws") // Need to add creation of this document to the database. >> {type:"count",counting:"api_hit",target:"ldbws",since:"DATE"}
     } catch (err) {
         log.out(`ldbService.get: Error, Unable to find CRS: ${err}`)
         var data = {ERROR:'NOT_FOUND',description:'The entered station was not found.  Please check and try again.'};

src/services/list.services.js

@@ -14,7 +14,14 @@ async function getCorpus(){
     return out;
 }
 
+async function hits(){
+    var out = await db.query("meta");
+    log.out(`listServices.meta: fetched server meta`)
+    return out;
+}
+
 module.exports = {
     getStations,
-    getCorpus
+    getCorpus,
+    hits
 }

src/utils/dbinit.utils.js

@@ -29,6 +29,7 @@ async function init(){
         }
     }
     indexes();
+    dbAccess.createCount();
 }
 
 async function check(coll){
@@ -81,6 +82,7 @@ async function indexes() {
     dbAccess.ensureIndex("stations", "3ALPHA");
     dbAccess.ensureIndex("stations", "STANOX");
     dbAccess.ensureIndex("stations", "TIPLOC");
+    dbAccess.ensureIndex("corpus", "NLCDESC", "text")
 }
 
 module.exports = {