From 462e9cca1d021652972067de39ff0118ce5faa2b Mon Sep 17 00:00:00 2001
From: Jesse Morgan <jesse@jesterpm.net>
Date: Fri, 24 Dec 2021 08:48:19 -0800
Subject: Christmas eve checkpoint

Well, it's not pretty, but it's Christmas eve and it's time to ship.
---
 .../2021-12-19-033646_add-battery-status/down.sql  |   1 +
 .../2021-12-19-033646_add-battery-status/up.sql    |   1 +
 src/main.rs                                        | 139 ++++++++++++++++++--
 src/maxmin.rs                                      | 145 +++++++++++++++++++++
 src/models.rs                                      |   1 +
 src/schema.rs                                      |   1 +
 www/backbone-min.js                                |   2 +
 www/favicon.ico                                    | Bin 0 -> 16958 bytes
 www/icon.png                                       | Bin 0 -> 1284 bytes
 www/index.html                                     |  79 +++++++++++
 www/jquery-3.6.0.min.js                            |   2 +
 www/main.js                                        | 104 +++++++++++++++
 www/manifest.webmanifest                           |  16 +++
 www/sadplant.png                                   | Bin 0 -> 740 bytes
 www/settings.svg                                   |  21 +++
 www/style.css                                      |  80 ++++++++++++
 www/underscore-umd-min.js                          |   6 +
 17 files changed, 587 insertions(+), 11 deletions(-)
 create mode 100644 migrations/2021-12-19-033646_add-battery-status/down.sql
 create mode 100644 migrations/2021-12-19-033646_add-battery-status/up.sql
 create mode 100644 src/maxmin.rs
 create mode 100644 www/backbone-min.js
 create mode 100644 www/favicon.ico
 create mode 100644 www/icon.png
 create mode 100644 www/index.html
 create mode 100644 www/jquery-3.6.0.min.js
 create mode 100644 www/main.js
 create mode 100644 www/manifest.webmanifest
 create mode 100644 www/sadplant.png
 create mode 100644 www/settings.svg
 create mode 100644 www/style.css
 create mode 100644 www/underscore-umd-min.js

diff --git a/migrations/2021-12-19-033646_add-battery-status/down.sql b/migrations/2021-12-19-033646_add-battery-status/down.sql
new file mode 100644
index 0000000..fdfa9c0
--- /dev/null
+++ b/migrations/2021-12-19-033646_add-battery-status/down.sql
@@ -0,0 +1 @@
+ALTER TABLE data DROP COLUMN batter_status;
diff --git a/migrations/2021-12-19-033646_add-battery-status/up.sql b/migrations/2021-12-19-033646_add-battery-status/up.sql
new file mode 100644
index 0000000..968bc66
--- /dev/null
+++ b/migrations/2021-12-19-033646_add-battery-status/up.sql
@@ -0,0 +1 @@
+ALTER TABLE data ADD COLUMN battery_status NUMERIC NOT NULL DEFAULT 1;
diff --git a/src/main.rs b/src/main.rs
index ad27759..d7dda15 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,11 +1,13 @@
 #[macro_use]
 extern crate diesel;
 
+use actix_files::Files;
+use actix_web::http::header;
 use actix_web::{middleware, web, HttpResponse, HttpServer, Responder};
-use chrono::{Duration, Utc};
-use diesel::Connection;
+use chrono::{DateTime, Duration, Utc};
 use diesel::prelude::*;
 use diesel::sqlite::SqliteConnection;
+use diesel::Connection;
 use hmac::{Hmac, Mac};
 use serde::{Deserialize, Serialize};
 use sha2::Sha256;
@@ -13,9 +15,11 @@ use std::collections::BTreeMap;
 use std::io;
 use std::sync::Mutex;
 
+mod maxmin;
 mod models;
 mod schema;
 
+use self::maxmin::*;
 use self::models::*;
 
 /// Application context to be available on every request.
@@ -24,10 +28,23 @@ struct Context {
     secret_key: Vec<u8>,
 }
 
+/// Status of a device.
+#[derive(Serialize)]
+struct DeviceResponse {
+    device_id: String,
+    name: String,
+    battery_level: Option<f64>,
+    current_value: Option<f64>,
+    water_level: Option<f64>,
+    last_watered: Option<DateTime<Utc>>,
+    last_updated: Option<DateTime<Utc>>,
+}
+
 /// Time series of datapoints for a device.
 #[derive(Serialize)]
 struct DeviceData {
-    device: Device,
+    device_id: String,
+    device: DeviceResponse,
     data: Vec<Datapoint>,
 }
 
@@ -46,10 +63,92 @@ struct PutDataRequest {
     signature: String,
 }
 
+impl DeviceResponse {
+    pub fn calculate_status(&mut self, data: &[Datapoint]) {
+        self.last_updated = data
+            .last()
+            .map(|v| DateTime::<Utc>::from_utc(v.timestamp, Utc));
+        self.battery_level = data.last().map(|v| v.battery_status);
+
+        // Find the local extrema
+        let mut values = data.iter().map(|v| v.value).collect();
+        normalize(&mut values);
+        smooth(&mut values, 3.0);
+        derive(&mut values);
+        let extrema = find_extrema(&values);
+
+        // Look for a sharp drop in the value to indicate watering.
+        let last_watered_index = extrema
+            .iter()
+            .filter_map(|x| match x {
+                Extremum::Minimum(i) => {
+                    if values[*i] < -0.1 {
+                        Some(i)
+                    } else {
+                        None
+                    }
+                }
+                _ => None,
+            })
+            .last();
+
+        self.last_watered =
+            last_watered_index.map(|i| DateTime::<Utc>::from_utc(data[*i].timestamp, Utc));
+
+        // How much water is left?
+        let low_watermark = last_watered_index.map(|i| data[*i].value);
+        let high_watermark = last_watered_index
+            .and_then(|i| {
+                extrema
+                    .iter()
+                    .rev()
+                    .filter_map(|x| match x {
+                        Extremum::Maximum(j) => {
+                            if j < i {
+                                Some(j)
+                            } else {
+                                None
+                            }
+                        }
+                        _ => None,
+                    })
+                    .next()
+            })
+            .map(|i| data[*i].value);
+
+        self.current_value = data.last().map(|v| v.value);
+        self.water_level = if let (Some(high), Some(low), Some(current)) =
+            (high_watermark, low_watermark, self.current_value)
+        {
+            Some(
+                1.0 - (current - f64::min(low, current))
+                    / (f64::max(high, current) - f64::max(low, current)),
+            )
+        } else {
+            None
+        };
+    }
+}
+
+impl From<Device> for DeviceResponse {
+    fn from(device: Device) -> DeviceResponse {
+        DeviceResponse {
+            device_id: device.device_id,
+            name: device.name,
+            battery_level: None,
+            water_level: None,
+            current_value: None,
+            last_watered: None,
+            last_updated: None,
+        }
+    }
+}
+
 impl DeviceData {
     pub fn new(device: Device) -> Self {
         DeviceData {
-            device,
+            device_id: device.device_id.to_string(),
+            device: device.into(),
             data: Vec::new(),
         }
     }
@@ -57,6 +156,10 @@ impl DeviceData {
     pub fn add_datapoint(&mut self, datapoint: Datapoint) {
         self.data.push(datapoint);
     }
+
+    pub fn calculate_status(&mut self) {
+        self.device.calculate_status(&self.data);
+    }
 }
 
 impl DataResponse {
@@ -74,7 +177,7 @@ impl DataResponse {
 impl PutDataRequest {
     pub fn validate_signature(&self, secret_key: &[u8]) -> bool {
         let data = format!(
-            "battery_value={}&device_id={}&value={}",
+            "battery_value={:0.2}&device_id={}&value={:0.2}",
             self.battery_value,
             urlencoding::encode(&self.device_id),
             self.value
@@ -99,6 +202,11 @@ impl PutDataRequest {
             }
         };
 
+        log::debug!(
+            "Verifying data '{}' matches signature '{}'",
+            &data,
+            &self.signature
+        );
         mac.update(data.as_bytes());
         mac.verify_slice(&signature).is_ok()
     }
@@ -132,11 +240,15 @@ async fn get_data(ctx: web::Data<Context>) -> impl Responder {
     }
 
     let mut response = DataResponse::new();
-    devicemap
-        .into_iter()
-        .for_each(|(_k, v)| response.add_device(v));
+    devicemap.into_iter().for_each(|(_k, mut v)| {
+        v.calculate_status();
+        response.add_device(v);
+    });
 
-    HttpResponse::Ok().json(response)
+    HttpResponse::Ok()
+        .header(header::CACHE_CONTROL, "no-store")
+        .header(header::PRAGMA, "no-cache")
+        .json(response)
 }
 
 async fn put_data(req: web::Form<PutDataRequest>, ctx: web::Data<Context>) -> impl Responder {
@@ -165,13 +277,17 @@ async fn put_data(req: web::Form<PutDataRequest>, ctx: web::Data<Context>) -> im
         device_id: req.device_id.to_string(),
         timestamp: Utc::now().naive_utc(),
         value: req.value,
+        battery_status: req.battery_value,
     };
     diesel::insert_into(data::table)
         .values(&datapoint)
         .execute(&mut *db)
         .expect("Insert datapoint record");
 
-    HttpResponse::Created().finish()
+    HttpResponse::Created()
+        .header(header::CACHE_CONTROL, "no-store")
+        .header(header::PRAGMA, "no-cache")
+        .finish()
 }
 
 fn open_database(db_filename: &str) -> io::Result<SqliteConnection> {
@@ -183,7 +299,7 @@ async fn main() -> io::Result<()> {
     dotenv::dotenv().ok();
     env_logger::init();
 
-    let bind = std::env::var("BIND").unwrap_or_else(|_| "127.0.0.1:8180".to_string());
+    let bind = std::env::var("BIND").unwrap_or_else(|_| ":::8180".to_string());
     let db_path = std::env::var("DATABASE_URL").expect("Missing DATABASE env variable");
     let secret_key = std::env::var("SECRET_KEY").expect("Missing SECRET_KEY env variable");
 
@@ -198,6 +314,7 @@ async fn main() -> io::Result<()> {
             .app_data(ctx.clone())
             .route("/data", web::get().to(get_data))
             .route("/data", web::put().to(put_data))
+            .service(Files::new("/", "www/").index_file("index.html"))
     })
     .bind(bind)
     .unwrap()
diff --git a/src/maxmin.rs b/src/maxmin.rs
new file mode 100644
index 0000000..6bea2d7
--- /dev/null
+++ b/src/maxmin.rs
@@ -0,0 +1,145 @@
+use std::cmp::Ordering;
+
+pub fn normalize(data: &mut Vec<f64>) {
+    if data.is_empty() {
+        return;
+    }
+
+    let max = *data
+        .iter()
+        .max_by(|a, b| a.partial_cmp(b).unwrap_or(Ordering::Equal))
+        .unwrap();
+    let min = *data
+        .iter()
+        .min_by(|a, b| a.partial_cmp(b).unwrap_or(Ordering::Equal))
+        .unwrap();
+    for x in data.iter_mut() {
+        *x = (*x - min) / (max - min);
+    }
+}
+
+pub fn smooth(data: &mut Vec<f64>, sigma: f64) {
+    const WINDOW_SIZE: usize = 7;
+
+    if data.is_empty() {
+        return;
+    }
+
+    // Build Gaussian filter
+    let sigsig = 2.0 * sigma.powi(2);
+    let mut g: Vec<f64> = (0..WINDOW_SIZE)
+        .map(|i| {
+            let x2 = (i as f64).powi(2);
+            std::f64::consts::E.powf(-x2 / sigsig)
+        })
+        .collect();
+
+    // Normalize Gaussian filter
+    let filter_sum: f64 = g.iter().sum();
+    g.iter_mut().for_each(|x| *x /= filter_sum);
+
+    // Smooth data
+    let first = data.first().unwrap();
+    let mut buffer = [*first; WINDOW_SIZE];
+    let mut bi = 0;
+    for (_loc, x) in data.iter_mut().enumerate() {
+        buffer[bi] = *x;
+        *x = 0.0;
+        for (i, b) in g.iter().enumerate() {
+            *x += b * buffer[(bi + i) % WINDOW_SIZE];
+        }
+        bi = (bi + 1) % WINDOW_SIZE;
+    }
+}
+
+pub fn derive(data: &mut Vec<f64>) {
+    const WINDOW_SIZE: usize = 3;
+
+    if data.is_empty() {
+        return;
+    }
+
+    // Calculate the derivative.
+    let first = data.first().unwrap();
+    let mut buffer = [*first; WINDOW_SIZE];
+    let mut bi = 0;
+    for (_loc, x) in data.iter_mut().enumerate() {
+        buffer[bi] = *x;
+        *x = (buffer[bi] - buffer[(bi + WINDOW_SIZE - 1) % (WINDOW_SIZE)])
+            / (WINDOW_SIZE as f64 - 1.0);
+        bi = (bi + 1) % WINDOW_SIZE;
+    }
+}
+
+enum State {
+    Start,
+    NoClue(usize, f64),
+    SeekingMinimum(usize, f64),
+    SeekingMaximum(usize, f64),
+}
+
+#[derive(Debug)]
+pub enum Extremum {
+    Maximum(usize),
+    Minimum(usize),
+}
+
+pub fn find_extrema(data: &[f64]) -> Vec<Extremum> {
+    let mut result = Vec::new();
+    let mut state = State::Start;
+    for (i, v) in data.iter().enumerate() {
+        let datum = *v;
+        state = match state {
+            State::Start => State::NoClue(i, datum),
+            State::NoClue(pi, prior) => {
+                if datum > prior {
+                    result.push(Extremum::Minimum(pi));
+                    State::SeekingMaximum(i, datum)
+                } else {
+                    result.push(Extremum::Maximum(pi));
+                    State::SeekingMinimum(i, datum)
+                }
+            }
+            State::SeekingMinimum(pi, prior) => {
+                if datum <= prior {
+                    State::SeekingMinimum(i, datum)
+                } else {
+                    result.push(Extremum::Minimum(pi));
+                    State::SeekingMaximum(i, datum)
+                }
+            }
+            State::SeekingMaximum(pi, prior) => {
+                if datum >= prior {
+                    State::SeekingMaximum(i, datum)
+                } else {
+                    result.push(Extremum::Maximum(pi));
+                    State::SeekingMinimum(i, datum)
+                }
+            }
+        };
+    }
+
+    match state {
+        State::Start => (),
+        State::NoClue(..) => (),
+        State::SeekingMinimum(i, _) => result.push(Extremum::Minimum(i)),
+        State::SeekingMaximum(i, _) => result.push(Extremum::Maximum(i)),
+    }
+
+    result
+}
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn normalize_normalizes() {
+        let mut x = vec![1.0, 2.0, 3.0, 4.0];
+
+        super::normalize(&mut x);
+
+        assert!((0.0 - x[0]).abs() < 0.001);
+        assert!((0.333 - x[1]).abs() < 0.001);
+        assert!((0.667 - x[2]).abs() < 0.001);
+        assert!((1.0 - x[3]).abs() < 0.001);
+    }
+}
diff --git a/src/models.rs b/src/models.rs
index d8796d0..ba57a9a 100644
--- a/src/models.rs
+++ b/src/models.rs
@@ -15,4 +15,5 @@ pub struct Datapoint {
     pub device_id: String,
     pub timestamp: NaiveDateTime,
     pub value: f64,
+    pub battery_status: f64,
 }
diff --git a/src/schema.rs b/src/schema.rs
index 04e88dc..40a3a97 100644
--- a/src/schema.rs
+++ b/src/schema.rs
@@ -3,6 +3,7 @@ table! {
         device_id -> Text,
         timestamp -> Timestamp,
         value -> Double,
+        battery_status -> Double,
     }
 }
 
diff --git a/www/backbone-min.js b/www/backbone-min.js
new file mode 100644
index 0000000..c8c33e0
--- /dev/null
+++ b/www/backbone-min.js
@@ -0,0 +1,2 @@
+(function(t){var e=typeof self=="object"&&self.self===self&&self||typeof global=="object"&&global.global===global&&global;if(typeof define==="function"&&define.amd){define(["underscore","jquery","exports"],function(i,n,r){e.Backbone=t(e,r,i,n)})}else if(typeof exports!=="undefined"){var i=require("underscore"),n;try{n=require("jquery")}catch(r){}t(e,exports,i,n)}else{e.Backbone=t(e,{},e._,e.jQuery||e.Zepto||e.ender||e.$)}})(function(t,e,i,n){var r=t.Backbone;var s=Array.prototype.slice;e.VERSION="1.4.0";e.$=n;e.noConflict=function(){t.Backbone=r;return this};e.emulateHTTP=false;e.emulateJSON=false;var a=e.Events={};var o=/\s+/;var h;var u=function(t,e,n,r,s){var a=0,h;if(n&&typeof n==="object"){if(r!==void 0&&"context"in s&&s.context===void 0)s.context=r;for(h=i.keys(n);a<h.length;a++){e=u(t,e,h[a],n[h[a]],s)}}else if(n&&o.test(n)){for(h=n.split(o);a<h.length;a++){e=t(e,h[a],r,s)}}else{e=t(e,n,r,s)}return 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this.set(e,i.extend({},t,{unset:true}))},hasChanged:function(t){if(t==null)return!i.isEmpty(this.changed);return i.has(this.changed,t)},changedAttributes:function(t){if(!t)return this.hasChanged()?i.clone(this.changed):false;var e=this._changing?this._previousAttributes:this.attributes;var n={};var r;for(var s in t){var a=t[s];if(i.isEqual(e[s],a))continue;n[s]=a;r=true}return r?n:false},previous:function(t){if(t==null||!this._previousAttributes)return null;return this._previousAttributes[t]},previousAttributes:function(){return i.clone(this._previousAttributes)},fetch:function(t){t=i.extend({parse:true},t);var e=this;var n=t.success;t.success=function(i){var r=t.parse?e.parse(i,t):i;if(!e.set(r,t))return false;if(n)n.call(t.context,e,i,t);e.trigger("sync",e,i,t)};G(this,t);return this.sync("read",this,t)},save:function(t,e,n){var r;if(t==null||typeof t==="object"){r=t;n=e}else{(r={})[t]=e}n=i.extend({validate:true,parse:true},n);var s=n.wait;if(r&&!s){if(!this.set(r,n))return false}else if(!this._validate(r,n)){return false}var a=this;var o=n.success;var h=this.attributes;n.success=function(t){a.attributes=h;var e=n.parse?a.parse(t,n):t;if(s)e=i.extend({},r,e);if(e&&!a.set(e,n))return false;if(o)o.call(n.context,a,t,n);a.trigger("sync",a,t,n)};G(this,n);if(r&&s)this.attributes=i.extend({},h,r);var u=this.isNew()?"create":n.patch?"patch":"update";if(u==="patch"&&!n.attrs)n.attrs=r;var l=this.sync(u,this,n);this.attributes=h;return l},destroy:function(t){t=t?i.clone(t):{};var e=this;var n=t.success;var r=t.wait;var s=function(){e.stopListening();e.trigger("destroy",e,e.collection,t)};t.success=function(i){if(r)s();if(n)n.call(t.context,e,i,t);if(!e.isNew())e.trigger("sync",e,i,t)};var a=false;if(this.isNew()){i.defer(t.success)}else{G(this,t);a=this.sync("delete",this,t)}if(!r)s();return a},url:function(){var t=i.result(this,"urlRoot")||i.result(this.collection,"url")||V();if(this.isNew())return t;var e=this.get(this.idAttribute);return t.replace(/[^\/]$/,"$&/")+encodeURIComponent(e)},parse:function(t,e){return t},clone:function(){return new this.constructor(this.attributes)},isNew:function(){return!this.has(this.idAttribute)},isValid:function(t){return this._validate({},i.extend({},t,{validate:true}))},_validate:function(t,e){if(!e.validate||!this.validate)return true;t=i.extend({},this.attributes,t);var n=this.validationError=this.validate(t,e)||null;if(!n)return true;this.trigger("invalid",this,n,i.extend(e,{validationError:n}));return false}});var _=e.Collection=function(t,e){e||(e={});this.preinitialize.apply(this,arguments);if(e.model)this.model=e.model;if(e.comparator!==void 0)this.comparator=e.comparator;this._reset();this.initialize.apply(this,arguments);if(t)this.reset(t,i.extend({silent:true},e))};var y={add:true,remove:true,merge:true};var b={add:true,remove:false};var x=function(t,e,i){i=Math.min(Math.max(i,0),t.length);var n=Array(t.length-i);var r=e.length;var s;for(s=0;s<n.length;s++)n[s]=t[s+i];for(s=0;s<r;s++)t[s+i]=e[s];for(s=0;s<n.length;s++)t[s+r+i]=n[s]};i.extend(_.prototype,a,{model:m,preinitialize:function(){},initialize:function(){},toJSON:function(t){return this.map(function(e){return e.toJSON(t)})},sync:function(){return e.sync.apply(this,arguments)},add:function(t,e){return this.set(t,i.extend({merge:false},e,b))},remove:function(t,e){e=i.extend({},e);var n=!i.isArray(t);t=n?[t]:t.slice();var r=this._removeModels(t,e);if(!e.silent&&r.length){e.changes={added:[],merged:[],removed:r};this.trigger("update",this,e)}return n?r[0]:r},set:function(t,e){if(t==null)return;e=i.extend({},y,e);if(e.parse&&!this._isModel(t)){t=this.parse(t,e)||[]}var n=!i.isArray(t);t=n?[t]:t.slice();var r=e.at;if(r!=null)r=+r;if(r>this.length)r=this.length;if(r<0)r+=this.length+1;var s=[];var a=[];var o=[];var h=[];var u={};var l=e.add;var c=e.merge;var f=e.remove;var d=false;var v=this.comparator&&r==null&&e.sort!==false;var p=i.isString(this.comparator)?this.comparator:null;var g,m;for(m=0;m<t.length;m++){g=t[m];var _=this.get(g);if(_){if(c&&g!==_){var b=this._isModel(g)?g.attributes:g;if(e.parse)b=_.parse(b,e);_.set(b,e);o.push(_);if(v&&!d)d=_.hasChanged(p)}if(!u[_.cid]){u[_.cid]=true;s.push(_)}t[m]=_}else if(l){g=t[m]=this._prepareModel(g,e);if(g){a.push(g);this._addReference(g,e);u[g.cid]=true;s.push(g)}}}if(f){for(m=0;m<this.length;m++){g=this.models[m];if(!u[g.cid])h.push(g)}if(h.length)this._removeModels(h,e)}var w=false;var E=!v&&l&&f;if(s.length&&E){w=this.length!==s.length||i.some(this.models,function(t,e){return t!==s[e]});this.models.length=0;x(this.models,s,0);this.length=this.models.length}else if(a.length){if(v)d=true;x(this.models,a,r==null?this.length:r);this.length=this.models.length}if(d)this.sort({silent:true});if(!e.silent){for(m=0;m<a.length;m++){if(r!=null)e.index=r+m;g=a[m];g.trigger("add",g,this,e)}if(d||w)this.trigger("sort",this,e);if(a.length||h.length||o.length){e.changes={added:a,removed:h,merged:o};this.trigger("update",this,e)}}return n?t[0]:t},reset:function(t,e){e=e?i.clone(e):{};for(var n=0;n<this.models.length;n++){this._removeReference(this.models[n],e)}e.previousModels=this.models;this._reset();t=this.add(t,i.extend({silent:true},e));if(!e.silent)this.trigger("reset",this,e);return t},push:function(t,e){return this.add(t,i.extend({at:this.length},e))},pop:function(t){var e=this.at(this.length-1);return this.remove(e,t)},unshift:function(t,e){return this.add(t,i.extend({at:0},e))},shift:function(t){var e=this.at(0);return this.remove(e,t)},slice:function(){return s.apply(this.models,arguments)},get:function(t){if(t==null)return void 0;return this._byId[t]||this._byId[this.modelId(this._isModel(t)?t.attributes:t)]||t.cid&&this._byId[t.cid]},has:function(t){return this.get(t)!=null},at:function(t){if(t<0)t+=this.length;return this.models[t]},where:function(t,e){return this[e?"find":"filter"](t)},findWhere:function(t){return this.where(t,true)},sort:function(t){var e=this.comparator;if(!e)throw new Error("Cannot sort a set without a comparator");t||(t={});var n=e.length;if(i.isFunction(e))e=e.bind(this);if(n===1||i.isString(e)){this.models=this.sortBy(e)}else{this.models.sort(e)}if(!t.silent)this.trigger("sort",this,t);return this},pluck:function(t){return this.map(t+"")},fetch:function(t){t=i.extend({parse:true},t);var e=t.success;var n=this;t.success=function(i){var r=t.reset?"reset":"set";n[r](i,t);if(e)e.call(t.context,n,i,t);n.trigger("sync",n,i,t)};G(this,t);return this.sync("read",this,t)},create:function(t,e){e=e?i.clone(e):{};var n=e.wait;t=this._prepareModel(t,e);if(!t)return false;if(!n)this.add(t,e);var r=this;var s=e.success;e.success=function(t,e,i){if(n)r.add(t,i);if(s)s.call(i.context,t,e,i)};t.save(null,e);return t},parse:function(t,e){return t},clone:function(){return new this.constructor(this.models,{model:this.model,comparator:this.comparator})},modelId:function(t){return t[this.model.prototype.idAttribute||"id"]},values:function(){return new E(this,k)},keys:function(){return new E(this,I)},entries:function(){return new E(this,S)},_reset:function(){this.length=0;this.models=[];this._byId={}},_prepareModel:function(t,e){if(this._isModel(t)){if(!t.collection)t.collection=this;return t}e=e?i.clone(e):{};e.collection=this;var n=new this.model(t,e);if(!n.validationError)return n;this.trigger("invalid",this,n.validationError,e);return false},_removeModels:function(t,e){var i=[];for(var n=0;n<t.length;n++){var r=this.get(t[n]);if(!r)continue;var s=this.indexOf(r);this.models.splice(s,1);this.length--;delete this._byId[r.cid];var a=this.modelId(r.attributes);if(a!=null)delete this._byId[a];if(!e.silent){e.index=s;r.trigger("remove",r,this,e)}i.push(r);this._removeReference(r,e)}return i},_isModel:function(t){return t instanceof m},_addReference:function(t,e){this._byId[t.cid]=t;var i=this.modelId(t.attributes);if(i!=null)this._byId[i]=t;t.on("all",this._onModelEvent,this)},_removeReference:function(t,e){delete this._byId[t.cid];var i=this.modelId(t.attributes);if(i!=null)delete this._byId[i];if(this===t.collection)delete t.collection;t.off("all",this._onModelEvent,this)},_onModelEvent:function(t,e,i,n){if(e){if((t==="add"||t==="remove")&&i!==this)return;if(t==="destroy")this.remove(e,n);if(t==="change"){var r=this.modelId(e.previousAttributes());var s=this.modelId(e.attributes);if(r!==s){if(r!=null)delete this._byId[r];if(s!=null)this._byId[s]=e}}}this.trigger.apply(this,arguments)}});var w=typeof Symbol==="function"&&Symbol.iterator;if(w){_.prototype[w]=_.prototype.values}var E=function(t,e){this._collection=t;this._kind=e;this._index=0};var k=1;var I=2;var S=3;if(w){E.prototype[w]=function(){return this}}E.prototype.next=function(){if(this._collection){if(this._index<this._collection.length){var t=this._collection.at(this._index);this._index++;var e;if(this._kind===k){e=t}else{var i=this._collection.modelId(t.attributes);if(this._kind===I){e=i}else{e=[i,t]}}return{value:e,done:false}}this._collection=void 0}return{value:void 0,done:true}};var T=e.View=function(t){this.cid=i.uniqueId("view");this.preinitialize.apply(this,arguments);i.extend(this,i.pick(t,H));this._ensureElement();this.initialize.apply(this,arguments)};var P=/^(\S+)\s*(.*)$/;var H=["model","collection","el","id","attributes","className","tagName","events"];i.extend(T.prototype,a,{tagName:"div",$:function(t){return this.$el.find(t)},preinitialize:function(){},initialize:function(){},render:function(){return this},remove:function(){this._removeElement();this.stopListening();return this},_removeElement:function(){this.$el.remove()},setElement:function(t){this.undelegateEvents();this._setElement(t);this.delegateEvents();return this},_setElement:function(t){this.$el=t instanceof e.$?t:e.$(t);this.el=this.$el[0]},delegateEvents:function(t){t||(t=i.result(this,"events"));if(!t)return this;this.undelegateEvents();for(var e in t){var n=t[e];if(!i.isFunction(n))n=this[n];if(!n)continue;var r=e.match(P);this.delegate(r[1],r[2],n.bind(this))}return this},delegate:function(t,e,i){this.$el.on(t+".delegateEvents"+this.cid,e,i);return this},undelegateEvents:function(){if(this.$el)this.$el.off(".delegateEvents"+this.cid);return this},undelegate:function(t,e,i){this.$el.off(t+".delegateEvents"+this.cid,e,i);return this},_createElement:function(t){return document.createElement(t)},_ensureElement:function(){if(!this.el){var t=i.extend({},i.result(this,"attributes"));if(this.id)t.id=i.result(this,"id");if(this.className)t["class"]=i.result(this,"className");this.setElement(this._createElement(i.result(this,"tagName")));this._setAttributes(t)}else{this.setElement(i.result(this,"el"))}},_setAttributes:function(t){this.$el.attr(t)}});var $=function(t,e,i,n){switch(e){case 1:return function(){return t[i](this[n])};case 2:return function(e){return t[i](this[n],e)};case 3:return function(e,r){return t[i](this[n],C(e,this),r)};case 4:return function(e,r,s){return t[i](this[n],C(e,this),r,s)};default:return function(){var e=s.call(arguments);e.unshift(this[n]);return t[i].apply(t,e)}}};var A=function(t,e,n,r){i.each(n,function(i,n){if(e[n])t.prototype[n]=$(e,i,n,r)})};var C=function(t,e){if(i.isFunction(t))return t;if(i.isObject(t)&&!e._isModel(t))return R(t);if(i.isString(t))return function(e){return e.get(t)};return t};var R=function(t){var e=i.matches(t);return function(t){return e(t.attributes)}};var M={forEach:3,each:3,map:3,collect:3,reduce:0,foldl:0,inject:0,reduceRight:0,foldr:0,find:3,detect:3,filter:3,select:3,reject:3,every:3,all:3,some:3,any:3,include:3,includes:3,contains:3,invoke:0,max:3,min:3,toArray:1,size:1,first:3,head:3,take:3,initial:3,rest:3,tail:3,drop:3,last:3,without:0,difference:0,indexOf:3,shuffle:1,lastIndexOf:3,isEmpty:1,chain:1,sample:3,partition:3,groupBy:3,countBy:3,sortBy:3,indexBy:3,findIndex:3,findLastIndex:3};var N={keys:1,values:1,pairs:1,invert:1,pick:0,omit:0,chain:1,isEmpty:1};i.each([[_,M,"models"],[m,N,"attributes"]],function(t){var e=t[0],n=t[1],r=t[2];e.mixin=function(t){var n=i.reduce(i.functions(t),function(t,e){t[e]=0;return t},{});A(e,t,n,r)};A(e,i,n,r)});e.sync=function(t,n,r){var s=j[t];i.defaults(r||(r={}),{emulateHTTP:e.emulateHTTP,emulateJSON:e.emulateJSON});var a={type:s,dataType:"json"};if(!r.url){a.url=i.result(n,"url")||V()}if(r.data==null&&n&&(t==="create"||t==="update"||t==="patch")){a.contentType="application/json";a.data=JSON.stringify(r.attrs||n.toJSON(r))}if(r.emulateJSON){a.contentType="application/x-www-form-urlencoded";a.data=a.data?{model:a.data}:{}}if(r.emulateHTTP&&(s==="PUT"||s==="DELETE"||s==="PATCH")){a.type="POST";if(r.emulateJSON)a.data._method=s;var o=r.beforeSend;r.beforeSend=function(t){t.setRequestHeader("X-HTTP-Method-Override",s);if(o)return o.apply(this,arguments)}}if(a.type!=="GET"&&!r.emulateJSON){a.processData=false}var h=r.error;r.error=function(t,e,i){r.textStatus=e;r.errorThrown=i;if(h)h.call(r.context,t,e,i)};var u=r.xhr=e.ajax(i.extend(a,r));n.trigger("request",n,u,r);return u};var j={create:"POST",update:"PUT",patch:"PATCH","delete":"DELETE",read:"GET"};e.ajax=function(){return e.$.ajax.apply(e.$,arguments)};var O=e.Router=function(t){t||(t={});this.preinitialize.apply(this,arguments);if(t.routes)this.routes=t.routes;this._bindRoutes();this.initialize.apply(this,arguments)};var U=/\((.*?)\)/g;var z=/(\(\?)?:\w+/g;var q=/\*\w+/g;var F=/[\-{}\[\]+?.,\\\^$|#\s]/g;i.extend(O.prototype,a,{preinitialize:function(){},initialize:function(){},route:function(t,n,r){if(!i.isRegExp(t))t=this._routeToRegExp(t);if(i.isFunction(n)){r=n;n=""}if(!r)r=this[n];var s=this;e.history.route(t,function(i){var a=s._extractParameters(t,i);if(s.execute(r,a,n)!==false){s.trigger.apply(s,["route:"+n].concat(a));s.trigger("route",n,a);e.history.trigger("route",s,n,a)}});return this},execute:function(t,e,i){if(t)t.apply(this,e)},navigate:function(t,i){e.history.navigate(t,i);return this},_bindRoutes:function(){if(!this.routes)return;this.routes=i.result(this,"routes");var t,e=i.keys(this.routes);while((t=e.pop())!=null){this.route(t,this.routes[t])}},_routeToRegExp:function(t){t=t.replace(F,"\\$&").replace(U,"(?:$1)?").replace(z,function(t,e){return e?t:"([^/?]+)"}).replace(q,"([^?]*?)");return new RegExp("^"+t+"(?:\\?([\\s\\S]*))?$")},_extractParameters:function(t,e){var n=t.exec(e).slice(1);return i.map(n,function(t,e){if(e===n.length-1)return t||null;return t?decodeURIComponent(t):null})}});var B=e.History=function(){this.handlers=[];this.checkUrl=this.checkUrl.bind(this);if(typeof window!=="undefined"){this.location=window.location;this.history=window.history}};var J=/^[#\/]|\s+$/g;var L=/^\/+|\/+$/g;var W=/#.*$/;B.started=false;i.extend(B.prototype,a,{interval:50,atRoot:function(){var t=this.location.pathname.replace(/[^\/]$/,"$&/");return t===this.root&&!this.getSearch()},matchRoot:function(){var t=this.decodeFragment(this.location.pathname);var e=t.slice(0,this.root.length-1)+"/";return e===this.root},decodeFragment:function(t){return decodeURI(t.replace(/%25/g,"%2525"))},getSearch:function(){var t=this.location.href.replace(/#.*/,"").match(/\?.+/);return t?t[0]:""},getHash:function(t){var e=(t||this).location.href.match(/#(.*)$/);return e?e[1]:""},getPath:function(){var t=this.decodeFragment(this.location.pathname+this.getSearch()).slice(this.root.length-1);return t.charAt(0)==="/"?t.slice(1):t},getFragment:function(t){if(t==null){if(this._usePushState||!this._wantsHashChange){t=this.getPath()}else{t=this.getHash()}}return t.replace(J,"")},start:function(t){if(B.started)throw new Error("Backbone.history has already been started");B.started=true;this.options=i.extend({root:"/"},this.options,t);this.root=this.options.root;this._wantsHashChange=this.options.hashChange!==false;this._hasHashChange="onhashchange"in window&&(document.documentMode===void 0||document.documentMode>7);this._useHashChange=this._wantsHashChange&&this._hasHashChange;this._wantsPushState=!!this.options.pushState;this._hasPushState=!!(this.history&&this.history.pushState);this._usePushState=this._wantsPushState&&this._hasPushState;this.fragment=this.getFragment();this.root=("/"+this.root+"/").replace(L,"/");if(this._wantsHashChange&&this._wantsPushState){if(!this._hasPushState&&!this.atRoot()){var e=this.root.slice(0,-1)||"/";this.location.replace(e+"#"+this.getPath());return true}else if(this._hasPushState&&this.atRoot()){this.navigate(this.getHash(),{replace:true})}}if(!this._hasHashChange&&this._wantsHashChange&&!this._usePushState){this.iframe=document.createElement("iframe");this.iframe.src="javascript:0";this.iframe.style.display="none";this.iframe.tabIndex=-1;var n=document.body;var r=n.insertBefore(this.iframe,n.firstChild).contentWindow;r.document.open();r.document.close();r.location.hash="#"+this.fragment}var s=window.addEventListener||function(t,e){return attachEvent("on"+t,e)};if(this._usePushState){s("popstate",this.checkUrl,false)}else if(this._useHashChange&&!this.iframe){s("hashchange",this.checkUrl,false)}else if(this._wantsHashChange){this._checkUrlInterval=setInterval(this.checkUrl,this.interval)}if(!this.options.silent)return this.loadUrl()},stop:function(){var t=window.removeEventListener||function(t,e){return detachEvent("on"+t,e)};if(this._usePushState){t("popstate",this.checkUrl,false)}else if(this._useHashChange&&!this.iframe){t("hashchange",this.checkUrl,false)}if(this.iframe){document.body.removeChild(this.iframe);this.iframe=null}if(this._checkUrlInterval)clearInterval(this._checkUrlInterval);B.started=false},route:function(t,e){this.handlers.unshift({route:t,callback:e})},checkUrl:function(t){var e=this.getFragment();if(e===this.fragment&&this.iframe){e=this.getHash(this.iframe.contentWindow)}if(e===this.fragment)return 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diff --git a/www/favicon.ico b/www/favicon.ico
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index 0000000..2884e0a
Binary files /dev/null and b/www/favicon.ico differ
diff --git a/www/icon.png b/www/icon.png
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diff --git a/www/index.html b/www/index.html
new file mode 100644
index 0000000..44592c0
--- /dev/null
+++ b/www/index.html
@@ -0,0 +1,79 @@
+<!doctype html>
+<html lang="en">
+    <head>
+        <meta charset="utf-8">
+        <title>Flowerpot</title>
+        <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
+        <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
+        <meta name="description" content="An app to track when houseplants were last watered">
+        <meta name="author" content="https://jesterpm.net">
+        <meta property="og:image" content="icons.png">
+        <link rel="icon" href="favicon.ico">
+        <link rel="manifest" href="manifest.webmanifest">
+        <link rel="stylesheet" href="style.css">
+
+        <script type="text/template" id="device-template">
+            <div class="card">
+              <h2><%- name %></h2>
+              <p>
+                <img src="icon.png">
+                <span class="level"><%- water_level %></span>
+              </p>
+              <p class="detail">
+                Last watered <%- last_watered %>
+              </p>
+              <div class="edit"><img src="settings.svg" width="24" height="24" alt="Edit" title="Edit"></div>
+            </div>
+        </script>
+
+        <script type="text/template" id="edit-device-template">
+            <div class="card">
+              <form>
+              <p>
+                <input type="text" name="name" value="<%- name %>">
+              </p>
+              <p>
+                <label><input type="checkbox" name="notify"> Notify me</label>
+              </p>
+              <p class="detail">
+                Last updated <%- last_updated %><br>
+                Resistence <%- Math.round(current_value) / 1000 %> k&ohm;<br>
+              </p>
+              <p class="actions">
+                <button class="btn cancel">Cancel</button>
+                <input type="submit" class="btn primary save" value="Save">
+              </p>
+              </form>
+            </div>
+        </script>
+
+
+        <script type="text/javascript" src="jquery-3.6.0.min.js" defer></script>
+        <script type="text/javascript" src="underscore-umd-min.js" defer></script>
+        <script type="text/javascript" src="backbone-min.js" defer></script>
+        <script type="text/javascript" src="main.js" defer></script>
+    </head>
+    <body>
+      <header>
+          <img src="icon.png" alt="Flowerpot Logo"> Flowerpot
+      </header>
+      <main>
+        <section id="content">
+          <div class="sadflower">
+            <p><img src="sadplant.png" alt="Sad flowerpot"></p>
+            <p>You don't have any plants :(</p>
+          </div>
+          <div class="card">
+            <h2>A beautiful flower</h2>
+            <p>
+              <img src="icon.png">
+              <span class="level">75%</span>
+            </p>
+            <p class="detail">
+              Last watered Sunday, December 20th at 20:00
+            </p>
+          </div>
+        </section>
+      </main>
+    </body>
+</html>
diff --git a/www/jquery-3.6.0.min.js b/www/jquery-3.6.0.min.js
new file mode 100644
index 0000000..c4c6022
--- /dev/null
+++ b/www/jquery-3.6.0.min.js
@@ -0,0 +1,2 @@
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diff --git a/www/main.js b/www/main.js
new file mode 100644
index 0000000..4be3528
--- /dev/null
+++ b/www/main.js
@@ -0,0 +1,104 @@
+var app = {}
+
+// Device model
+app.Device = Backbone.Model.extend({
+    idAttribute: 'device_id'
+});
+
+// Devices Collection
+app.Devices = Backbone.Collection.extend({
+    idAttribute: 'device_id',
+    url: 'data',
+    model: app.Device,
+    parse: function(resp) {
+        return resp.devices;
+    }
+});
+
+// Device view
+app.DeviceView = Backbone.View.extend({
+    className: 'device',
+    viewTemplate: _.template($('#device-template').html()),
+    editTemplate: _.template($('#edit-device-template').html()),
+    events: {
+      'click .edit': 'onEdit',
+      'submit form': 'onSave',
+      'click .cancel': 'onCancel'
+    },
+    initialize: function() {
+        this.listenTo(this.model, 'change', this.render);
+        this.template = this.viewTemplate;
+    },
+    compute: function() {
+        const device_id = this.model.attributes.device.device_id;
+        let name = localStorage.getItem("device_id=" + device_id + ".name");
+        if (name == null) {
+          name = "A beautiful flower";
+        }
+        const template_vars = {
+          name: name,
+          water_level: Math.round(this.model.attributes.device.water_level * 100) + "%",
+          current_value: this.model.attributes.device.current_value,
+          last_updated: new Date(this.model.attributes.device.last_updated).toLocaleString(),
+          last_watered: new Date(this.model.attributes.device.last_watered).toLocaleString()
+        };
+        return template_vars;
+    },
+    render: function() {
+        this.$el.html(this.template(this.compute()));
+        return this;
+    },
+    onEdit: function(e) {
+        this.template = this.editTemplate;
+        this.render();
+        this.$el.html(this.editTemplate(this.compute()));
+    },
+    onSave: function(e) {
+        e.preventDefault();
+        const new_name = e.target.name.value;
+        const device_id = this.model.attributes.device.device_id;
+        let name = localStorage.setItem("device_id=" + device_id + ".name", new_name);
+        this.$el.html(this.template(this.compute()));
+        this.template = this.viewTemplate;
+        this.render();
+    },
+    onCancel: function(e) {
+        this.template = this.viewTemplate;
+        this.render();
+    }
+});
+
+// The main app
+app.AppView = Backbone.View.extend({
+    el: "#content",
+    initialize: function() {
+        app.devices = new app.Devices();
+        app.devices.on('add', this.addOneDevice, this);
+        app.devices.on('reset', this.addAllDevices, this);
+        this.refresh();
+    },
+    refresh: function() {
+        app.devices.fetch({
+          success: function() {
+          }
+        });
+
+        let self = this;
+        setTimeout(function() {
+            self.refresh();
+        }, 300000);
+    },
+    addOneDevice: function(device) {
+        var view = new app.DeviceView({model: device});
+        this.$el.append(view.render().el);
+    },
+    addAllDevices: function() {
+        this.$el.html('');
+        app.devices.each(this.addOneDevice, this);
+    }
+});
+
+
+$(document).ready(function() {
+    $("#content").html(new app.AppView())
+});
diff --git a/www/manifest.webmanifest b/www/manifest.webmanifest
new file mode 100644
index 0000000..3e3778f
--- /dev/null
+++ b/www/manifest.webmanifest
@@ -0,0 +1,16 @@
+{
+  "background_color": "#DDD",
+  "description": "An app to track when houseplants were last watered",
+  "display": "fullscreen",
+  "icons": [
+    {
+      "src": "icon.png",
+      "sizes": "64x64",
+      "type": "image/png"
+    }
+  ],
+  "name": "Flowerpot",
+  "short_name": "Flowerpot",
+  "start_url": "/index.html"
+}
+
diff --git a/www/sadplant.png b/www/sadplant.png
new file mode 100644
index 0000000..2845e3b
Binary files /dev/null and b/www/sadplant.png differ
diff --git a/www/settings.svg b/www/settings.svg
new file mode 100644
index 0000000..ffceb3b
--- /dev/null
+++ b/www/settings.svg
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 viewBox="0 0 458.317 458.317" style="enable-background:new 0 0 458.317 458.317;" xml:space="preserve">
+<g>
+	<g>
+		<path d="M446.185,179.159h-64.768c-2.536-7.702-5.636-15.15-9.26-22.29l45.818-45.818c4.737-4.737,4.737-12.416,0-17.152
+			L364.416,40.34c-4.737-4.737-12.416-4.737-17.152,0l-45.818,45.818c-7.14-3.624-14.587-6.724-22.289-9.26V12.131
+			c0.001-6.699-5.429-12.129-12.128-12.129h-75.743c-6.698,0-12.129,5.43-12.129,12.128v64.768
+			c-7.702,2.535-15.149,5.636-22.29,9.26L111.05,40.341c-4.737-4.737-12.416-4.737-17.152,0L40.339,93.9
+			c-4.737,4.736-4.737,12.416,0,17.152l45.817,45.817c-3.624,7.14-6.725,14.588-9.26,22.29H12.129C5.43,179.159,0,184.59,0,191.288
+			v75.743c0,6.698,5.43,12.128,12.129,12.128h64.768c2.536,7.702,5.636,15.149,9.26,22.29L40.34,347.266
+			c-4.737,4.736-4.737,12.416,0,17.152l53.559,53.559c4.737,4.736,12.416,4.736,17.152,0l45.817-45.817
+			c7.14,3.624,14.587,6.725,22.29,9.26v64.768c0,6.698,5.43,12.128,12.129,12.128h75.743c6.698,0,12.129-5.43,12.129-12.128v-64.768
+			c7.702-2.535,15.149-5.636,22.289-9.26l45.818,45.817c4.737,4.736,12.416,4.736,17.152,0l53.559-53.559
+			c4.737-4.737,4.737-12.416,0-17.152l-45.817-45.817c3.624-7.14,6.724-14.587,9.26-22.289h64.768
+			c6.698,0,12.129-5.43,12.129-12.128v-75.743C458.314,184.59,452.884,179.159,446.185,179.159z M229.157,289.542
+			c-33.349,0-60.384-27.035-60.384-60.384s27.035-60.384,60.384-60.384s60.384,27.035,60.384,60.384
+			S262.506,289.542,229.157,289.542z"/>
+	</g>
+</g>
+</svg>
diff --git a/www/style.css b/www/style.css
new file mode 100644
index 0000000..80c25c5
--- /dev/null
+++ b/www/style.css
@@ -0,0 +1,80 @@
+html {
+    box-sizing: border-box;
+}
+
+body {
+    font-family: sans-serif;
+    padding: 0;
+    margin: 0;
+    background: #EEE;
+}
+
+header {
+    font-size: 200%;
+    background: #ddd;
+    padding: 10px;
+}
+
+header img {
+    vertical-align: middle;
+}
+
+.btn {
+    padding: 10px;
+    background: white;
+    border: solid 1px #999;
+    border-radius: 7px;
+}
+
+.btn:hover {
+    background: #EEE;
+}
+
+.btn.primary {
+    background: #6ACC62;
+}
+
+.btn.primary:hover {
+    background: #6FD166;
+}
+
+.card {
+    margin: 25px;
+    padding: 0px 10px;
+    border: solid 1px white;
+    border-radius: 7px;
+    background: white;
+    position: relative;
+}
+
+.card .actions {
+    text-align: right;
+}
+
+.card img {
+    vertical-align: middle;
+}
+
+.sadflower {
+    text-align: center;
+    font-style: italic;
+}
+
+.level {
+    margin-left: 20px;
+    font-weight: bold;
+    font-size: 200%;
+}
+
+.edit {
+    cursor: pointer;
+    position: absolute;
+    top: 10px;
+    right: 10px;
+}
+
+.detail {
+    font-size: small;
+    font-style: italic;
+    color: #555;
+}
diff --git a/www/underscore-umd-min.js b/www/underscore-umd-min.js
new file mode 100644
index 0000000..cf177d4
--- /dev/null
+++ b/www/underscore-umd-min.js
@@ -0,0 +1,6 @@
+!function(n,r){"object"==typeof exports&&"undefined"!=typeof module?module.exports=r():"function"==typeof define&&define.amd?define("underscore",r):(n="undefined"!=typeof globalThis?globalThis:n||self,function(){var t=n._,e=n._=r();e.noConflict=function(){return n._=t,e}}())}(this,(function(){
+//     Underscore.js 1.13.1
+//     https://underscorejs.org
+//     (c) 2009-2021 Jeremy Ashkenas, Julian Gonggrijp, and DocumentCloud and Investigative Reporters & Editors
+//     Underscore may be freely distributed under the MIT license.
+var n="1.13.1",r="object"==typeof self&&self.self===self&&self||"object"==typeof global&&global.global===global&&global||Function("return this")()||{},t=Array.prototype,e=Object.prototype,u="undefined"!=typeof Symbol?Symbol.prototype:null,o=t.push,i=t.slice,a=e.toString,f=e.hasOwnProperty,c="undefined"!=typeof ArrayBuffer,l="undefined"!=typeof DataView,s=Array.isArray,p=Object.keys,v=Object.create,h=c&&ArrayBuffer.isView,y=isNaN,d=isFinite,g=!{toString:null}.propertyIsEnumerable("toString"),b=["valueOf","isPrototypeOf","toString","propertyIsEnumerable","hasOwnProperty","toLocaleString"],m=Math.pow(2,53)-1;function j(n,r){return r=null==r?n.length-1:+r,function(){for(var t=Math.max(arguments.length-r,0),e=Array(t),u=0;u<t;u++)e[u]=arguments[u+r];switch(r){case 0:return n.call(this,e);case 1:return n.call(this,arguments[0],e);case 2:return n.call(this,arguments[0],arguments[1],e)}var o=Array(r+1);for(u=0;u<r;u++)o[u]=arguments[u];return o[r]=e,n.apply(this,o)}}function _(n){var r=typeof 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