doc: update or create for EGL

.markdownlint.json

@@ -51,5 +51,6 @@
     "style": "dash"
   },
   "no-bare-urls": false,
-  "line_length": false
-}
+  "line_length": false,
+  "MD054": false
+}
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docs/konnectors/egl.md

@@ -11,6 +11,12 @@ You should also check Cozy's official documentations for konnectors :
 - API Url for Development : [https://agence-rec.eaudugrandlyon.com](https://agence-rec.eaudugrandlyon.com/)
 - API Url for Production : [https://agence.eaudugrandlyon.com/ws](https://agence.eaudugrandlyon.com/ws)
 
+## Update or create data
+
+This konnector updates data if it has changed since the last execution or creates a new entry if the data is new. It also updates month and year aggregates except for start month and start year to prevent overriding data if user has more than 3 years of data.
+
+For this we use a combinaison of the hydrateAndFilter function and the updateOrCreate function.
+
 ## Authentication
 
 In order to authenticate to the EGL API we have to request the following route
@@ -56,7 +62,7 @@ Once you've sent this request the API should answer with a code 100 if everythin
 
 ## Fetch Data
 
-:::warning 
+:::warning
 The earliest data that can be fetched is November 2022 (not 3 years) due to migration from EGL to EPGL
 :::
 
@@ -118,12 +124,9 @@ If you're looking for more information about the API, checkout the [complete API
 
 ### Konnector Methods
 
-| Method                        | Description                                                                                                                                                                                                                                                                         |
-| ----------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| start                         | Init Function                                                                                                                                                                                                                                                                       |
-| getData                       | Retrieve data from API                                                                                                                                                                                                                                                              |
-| processData                   | Parse data. Remove existing data from DB using hydrateAndFilter, store filtered data and return the list of filtered data                                                                                                                                                           |
-| authenticate                  | Authentication method. Requires login, password, baseUrl and ApiAuthKey.                                                                                                                                                                                                            |
-| storeData                     | Save data in the right doctype db and prevent duplicated keys                                                                                                                                                                                                                       |
-| format                        | Format data for DB storage and remove bad data (former "T" typeagregats remain in response even if the data was added later, leading to duplicated data)                                                                                                                                                                                                                                      |
-| resetInProgressAggregatedData | Function handling special case.The temporary aggregated data need to be remove in order for the most recent one to be saved. Ex for com.grandlyon.egl.year : `{ load: 76.712, year: 2020, ... }` need to be replace by `{ load: 82.212, year: 2020, ... }` after egl data reprocess |
+| Method                        | Description   |
+| ----------------------------- | ------------- |
+| start                         | Init Function |
+| getData                       | Retrieve data from API |
+| authenticate                  | Authentication method. Requires login, password, baseUrl and ApiAuthKey. |
+| format                        | Format data for DB storage and remove bad data (former "T" typeagregats remain in response even if the data was added later, leading to duplicated data)|