forecasts.aug diagrams

Weather API

Project overview · Compiled explanation

Sequences

Call arrows identify checked targets; loop and branch frames determine when they run. Open that target’s module to follow its implementation. Branches describe alternatives; loops describe repeated work. Native calls and interface dispatch stop at their declared contracts. Exit notes end that path; enclosing recovery and cleanup remain visible.

WeatherForecast constructor

Source

The JSON shape returned by the forecast endpoint. Temperatures use whole degrees.

It takes date as a string, kept read-only, temperatureC and temperatureF as integers, kept read-only, and summary as a string, kept read-only.

Receive fields: date, temperatureC, temperatureF, summary. Explanation.

weatherForecast

Source

weatherForecast handles GET /weatherforecast.

Return five simulated forecasts. Fixed data keeps the example and its tests reproducible.

100%

Mermaid source

sequenceDiagram
    participant p0 as weatherForecast

    Note over p0: GET /weatherforecast
    p0->>p0: WeatherForecast(date=”2026-01-01”, temperatureC=0,<br/>temperatureF=32, summary=”Freezing”) · construct value
    p0-->>p0: WeatherForecast result: WeatherForecast
    p0->>p0: WeatherForecast(date=”2026-01-02”, temperatureC=10,<br/>temperatureF=50, summary=”Cool”) · construct value
    p0-->>p0: WeatherForecast result 2: WeatherForecast
    p0->>p0: WeatherForecast(date=”2026-01-03”, temperatureC=20,<br/>temperatureF=68, summary=”Mild”) · construct value
    p0-->>p0: WeatherForecast result 3: WeatherForecast
    p0->>p0: WeatherForecast(date=”2026-01-04”, temperatureC=30,<br/>temperatureF=86, summary=”Warm”) · construct value
    p0-->>p0: WeatherForecast result 4: WeatherForecast
    p0->>p0: WeatherForecast(date=”2026-01-05”, temperatureC=35,<br/>temperatureF=95, summary=”Hot”) · construct value
    p0-->>p0: WeatherForecast result 5: WeatherForecast
    Note over p0: Return ［ WeatherForecast( date=”2026-01-01”,<br/>temperatureC=0, temperatureF=32, summary=”Freezing” ),<br/>WeatherForecast( date=”2026-01-02”, temperatureC=10,<br/>temperatureF=50, summary=”Cool” ), WeatherForecast(<br/>date=”2026-01-03”, temperatureC=20, temperatureF=68,<br/>summary=”Mild” ), WeatherForecast( date=”2026-01-04”,<br/>temperatureC=30, temperatureF=86, summary=”Warm” ),<br/>WeatherForecast( date=”2026-01-05”, temperatureC=35,<br/>temperatureF=95, summary=”Hot” ) ］； required cleanup<br/>runs before exit
    Note over p0: HTTP result follows declared response and error mapping；<br/>unhandled request failure returns 500

Called contracts

• WeatherForecast — forecasts.aug