presentation_timer: interpolating non-defined numeric slides

apps/presentation_timer/ChangeLog

@@ -1,2 +1,3 @@
 0.01: first release
 0.02: added interface for configuration from app loader
+0.03: merged save state and interpolating non-defined numeric slides

apps/presentation_timer/README.md

@@ -26,8 +26,12 @@ The only requirement is that timings are increasing,
 so slides number don't have to be consecutive,
 some can be skipped and they can even be short texts.
 
-At the moment the app is just quick and dirty
+In case the series of slide numbers/names is strictly increasing and doesn't
-but it should do its job.
+contain strings, but numbers are not consecutive integers, the app will
+interpolate intermediate slides (i.e. the first slide in the csv is 5 at minute
+5, the app will add slide 1 at minute 1, slide 2 at minute 2, etc.)
+
+At the moment the app is just quick and dirty but it should do its job.
 
 ## Screenshots
 

apps/presentation_timer/metadata.json

@@ -1,7 +1,7 @@
 {
   "id": "presentation_timer",
   "name": "Presentation Timer",
-  "version": "0.02",
+  "version": "0.03",
   "description": "A touch based presentation timer for Bangle JS 2",
   "icon": "presentation_timer.png",
   "screenshots": [{"url":"screenshot1.png"},{"url":"screenshot2.png"},{"url":"screenshot3.png"},{"url":"screenshot4.png"}],
@@ -14,7 +14,7 @@
     {"name":"presentation_timer.img","url":"presentation_timer.icon.js","evaluate":true}
   ],
   "data": [
-    {"name":"presentation_timer.json"}
+    {"name":"presentation_timer.json"},
     { "name": "presentation_timer.csv" }
   ]
 }

apps/presentation_timer/presentation_timer.app.js

@@ -49,6 +49,25 @@ function log_debug(o) {
   //console.log(o);
 }
 
+function fillBlanks(slides) {
+  start = 1;
+  time = 0;
+  let arr = [];
+  for(let idx in slides) {
+    s = slides[idx];
+    if(s[1] != start) {
+      step = (s[0] - time) / (s[1] - start + 1);
+      for(let i=0; i<s[1]-start; ++i) {
+        arr.push([+(step*(i+1)+time).toFixed(2), start+i]);
+      }
+    }
+    arr.push([s[0],+s[1]]);
+    start = (+s[1]) + 1;
+    time = s[0];
+  }
+  return arr;
+}
+
 //first must be a number
 function readSlides() {
   let csv = require("Storage").read("presentation_timer.csv");
@@ -56,6 +75,11 @@ function readSlides() {
   let lines = csv.split("\n").filter(e=>e);
   log_debug("Loading "+lines.length+" slides");
   slides = lines.map(line=>{let s=line.split(";");return [+s[0],s[1]];});
+  //all numbers and always strictly increasing
+  if(slides.filter(s=>isNaN(+s[1])).length == 0 &&
+    slides.map((p,i,a)=>p[1]-(a[i-1]?a[i-1][1]:undefined)).filter(p=>p<=0).length == 0) {
+    slides = fillBlanks(slides);
+  }
 }