completed iLMeteo

README.md

@@ -1,14 +1,19 @@
 # Weather Web-Scraper
 
+> **CAUTION**  
+> The following utility is in EARLY developement. Many promises made in this
+> readme might not actually be true. Hopefully one day we'll be out of beta ~and
+> be releasing on time~
+
 An utility to scrape italian weather websites to collect and compare weather
 information
 
 ## Usage
 
-> **CAUTION**  
-> The following utility is in EARLY developement. Many promises made in this
-> readme might not actually be true. Hopefully one day we'll be out of beta ~and
-> be releasing on time~
+> **WARNING**  
+> The script is configured to run on Nix, and because of this is more
+> complicated than it needs to be. You can remove unnecessary stuff if you're
+> not running this on nix
 
 The scraper collects data and arranges in the following scheme
 
@@ -16,12 +21,12 @@ The scraper collects data and arranges in the following scheme
 {
     "today": {
         "[0..23]": {
-            "temperature": {
+            "temp": {
                 "type": "number",
                 "unitOfMeasurement": "degrees",
                 "description": "expected temperature at the given hour"
             },
-            "precipitation": {
+            "prec": {
                 "type": "number",
                 "unitOfMeasurement": "mm",
                 "description": "expected precipitation at the given hour"
@@ -29,21 +34,59 @@ The scraper collects data and arranges in the following scheme
         }
     },
     "tomorrow": {
-        "[0..23]": {}
+        "[0..23]": {
+            "temp": {
+                "type": "number",
+                "unitOfMeasurement": "degrees",
+                "description": "expected temperature at the given hour"
+            },
+            "prec": {
+                "type": "number",
+                "unitOfMeasurement": "mm",
+                "description": "expected precipitation at the given hour"
+            }
+        }
     },
     "dayAfterTomorrow": {
-        "[0..23]": {}
+        "[0..23]": {
+            "temp": {
+                "type": "number",
+                "unitOfMeasurement": "degrees",
+                "description": "expected temperature at the given hour"
+            },
+            "prec": {
+                "type": "number",
+                "unitOfMeasurement": "mm",
+                "description": "expected precipitation at the given hour"
+            }
+        }
     },
     "week": {
-        "[0..6]": {}
+        "[0..6]": {
+            "minTemp": {
+                "type": "number",
+                "unitOfMeasurement": "degrees",
+                "description": "minimum expected temperature for the day"
+            },
+            "maxTemp": {
+                "type": "number",
+                "unitOfMeasurement": "degrees",
+                "description": "maximum expected temperature for the day"
+            },
+            "totPrec": {
+                "type": "number",
+                "unitOfMeasurement": "mm",
+                "description": "total expected precipitation for the day"
+            }
+        }
     }
 }
 ```
 
-> **WARNING**  
-> The script is configured to run on Nix, and because of this is more
-> complicated than it needs to be. You can remove unnecessary stuff if you're
-> not running this on nix
+The keys for the `week` entry are intended as an offset from today. That is, the
+object at `0` will be the results for today, the object at `1` will be the
+results for tomorrow, and the object at `6` will be the results for 6 days from
+now
 
 ### Sources
 
@@ -57,7 +100,7 @@ eventually, together with the current level of implementation
 ```
 
 | Source                                               | Status | Comments |
-| ---------------------------------------------------- | ------ | ------------------------------------------------------------------------------------------------------------------------------- |
-| [iLMeteo](https://www.ilmeteo.it)                    | 🚧     | precipitations are not yet interpolated and are given as the scraped string. Furthermore, there is not yet weather for the week |
+| ---------------------------------------------------- | ------ | -------- |
+| [iLMeteo](https://www.ilmeteo.it)                    | ✅     |          |
 | [3BMeteo](https://www.3bmeteo.com/)                  | ⛔️    |          |
 | [Meteo Aeronautica Militare](http://www.meteoam.it/) | ⛔️    |          |

index.js

@@ -19,3 +19,4 @@ const run = async () => {
 }
 
 console.dir(await run(), { depth: null })
+// await run()

scrapers/iLMeteo.js

@@ -1,3 +1,12 @@
+const parseTemp = el => {
+    return parseFloat(el.textContent)
+}
+const parsePrec = el => {
+    const text = el.textContent
+    if (text === '- assenti -') return 0
+    return parseFloat(text)
+}
+
 const scrapePage = async (browser, url, isToday) => {
     let result = {}
 
@@ -6,51 +15,89 @@ const scrapePage = async (browser, url, isToday) => {
 
     const weatherTable = await page.locator('.weather_table').waitHandle()
 
-    const startTime = isToday ? new Date().getHours() + 2 : 0
+    const startTime = isToday ? new Date().getHours() + 1 : 1
     const endTime = 24
-    for (let i = startTime; i < endTime; i++) {
+
+    if (isToday) {
+        try {
+            const row = await weatherTable.$$('.latest_detection')
+            const fields = await row[1]?.$$('td')
+            const temp = await fields[2].evaluate(parseTemp)
+            const prec = await fields[3].evaluate(parsePrec)
+            result[startTime - 1] = { temp, prec }
+        } catch (error) {
+            retult[startTime - 1] = null
+            // console.log(error)
+        }
+    }
+    for (let i = startTime; i <= endTime; i++) {
+        try {
             const selector = isToday
                 ? `.forecast_1h[data-dialogid="${i}"] td`
-            : `.forecast_1h[data-dialogid="${1000 + i}"] td`
+                : `.forecast_1h[data-dialogid="${1000 + i - 1}"] td`
 
             const fields = await weatherTable.$$(selector)
 
-        const temp = await fields[2].evaluate(el => parseFloat(el.textContent))
-        const prec = await fields[3].evaluate(el => el.textContent)
+            const temp = await fields[2].evaluate(parseTemp)
+            const prec = await fields[3].evaluate(parsePrec)
             result[i] = { temp, prec }
+        } catch (error) {
+            retult[i] = null
+            // console.log(error)
+        }
     }
 
     await page.close()
 
     return result
 }
-const fetchILMeteoToday = async browser => {
-    return await scrapePage(browser, 'https://www.ilmeteo.it/meteo/Pisa', true)
-}
-const fetchILMeteoTomorrow = async browser => {
-    return await scrapePage(
-        browser,
-        'https://www.ilmeteo.it/meteo/Pisa/domani',
-        false,
-    )
+
+const rearrangeResults = results => {
+    for (let i = 0; i < 6; i++) {
+        const midnight = results[i][24]
+        delete results[i][24]
+        results[i + 1][0] = midnight
+    }
+    delete results[6][24]
+
+    return results
 }
-const fetchILMeteoDayAfterTomorrow = async browser => {
-    return await scrapePage(
-        browser,
-        'https://www.ilmeteo.it/meteo/Pisa/dopodomani',
-        false,
-    )
+
+const getDaySummary = day => {
+    let minTemp = Number.MAX_VALUE
+    let maxTemp = Number.MIN_VALUE
+    let totPrec = 0
+    for (const h in day) {
+        minTemp = Math.min(minTemp, day[h].temp)
+        maxTemp = Math.max(maxTemp, day[h].temp)
+        totPrec += day[h].prec
+    }
+    return {
+        minTemp,
+        maxTemp,
+        totPrec,
+    }
 }
+
 export default async browser => {
-    const [today, tomorrow, dayAfterTomorrow] = await Promise.all([
-        fetchILMeteoToday(browser),
-        fetchILMeteoTomorrow(browser),
-        fetchILMeteoDayAfterTomorrow(browser),
-    ])
+    const url = text => `https://www.ilmeteo.it/meteo/Pisa/${text}`
+
+    const results = rearrangeResults(
+        await Promise.all([
+            scrapePage(browser, url(''), true),
+            scrapePage(browser, url('domani'), false),
+            scrapePage(browser, url('dopodomani'), false),
+            scrapePage(browser, url('3'), false),
+            scrapePage(browser, url('4'), false),
+            scrapePage(browser, url('5'), false),
+            scrapePage(browser, url('6'), false),
+        ]),
+    )
 
     return {
-        today,
-        tomorrow,
-        dayAfterTomorrow,
+        today: results[0],
+        tomorrow: results[1],
+        dayAfterTomorrow: results[2],
+        week: results.map(getDaySummary),
     }
 }