[DISCO-4151] Merino: add client for wcs (#7345)

* [DISCO-4151] Merino: add client for wcs

* add accept language header

Author: tiftran

components/merino/src/lib.rs

@@ -20,4 +20,5 @@
 
 pub mod curated_recommendations;
 pub mod suggest;
+pub mod worldcup;
 uniffi::setup_scaffolding!("merino");

components/merino/src/worldcup/error.rs

@@ -0,0 +1,77 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+pub use error_support::error;
+use error_support::{ErrorHandling, GetErrorHandling};
+
+pub type Result<T> = std::result::Result<T, Error>;
+pub type ApiResult<T> = std::result::Result<T, MerinoWorldCupApiError>;
+
+#[derive(Debug, thiserror::Error, uniffi::Error)]
+pub enum MerinoWorldCupApiError {
+    /// A network-level failure.
+    #[error("WorldCup network error: {reason}")]
+    Network { reason: String },
+
+    /// Any other error, e.g. HTTP errors, validation errors.
+    #[error("WorldCup error: code {code:?}, reason: {reason}")]
+    Other { code: Option<u16>, reason: String },
+}
+
+#[derive(Debug, thiserror::Error)]
+pub enum Error {
+    /// Failed to parse a URL.
+    #[error("URL parse error: {0}")]
+    UrlParse(#[from] url::ParseError),
+
+    /// Failed to send the HTTP request.
+    #[error("Error sending request: {0}")]
+    Request(#[from] viaduct::ViaductError),
+
+    /// The server rejected the request due to malformed syntax (HTTP 400).
+    #[error("Bad request ({code}): {message}")]
+    BadRequest { code: u16, message: String },
+
+    /// The server rejected the request due to invalid input (HTTP 422).
+    #[error("Validation error ({code}): {message}")]
+    Validation { code: u16, message: String },
+
+    /// The server encountered an internal error (HTTP 5xx).
+    #[error("Server error ({code}): {message}")]
+    Server { code: u16, message: String },
+
+    /// An unexpected HTTP status code was received.
+    #[error("Unexpected error ({code}): {message}")]
+    Unexpected { code: u16, message: String },
+}
+
+impl GetErrorHandling for Error {
+    type ExternalError = MerinoWorldCupApiError;
+
+    fn get_error_handling(&self) -> ErrorHandling<Self::ExternalError> {
+        match self {
+            Self::Request { .. } => ErrorHandling::convert(MerinoWorldCupApiError::Network {
+                reason: self.to_string(),
+            })
+            .log_warning(),
+
+            Self::Validation { code, .. }
+            | Self::Server { code, .. }
+            | Self::Unexpected { code, .. }
+            | Self::BadRequest { code, .. } => {
+                ErrorHandling::convert(MerinoWorldCupApiError::Other {
+                    code: Some(*code),
+                    reason: self.to_string(),
+                })
+                .report_error("merino-http-error")
+            }
+
+            Self::UrlParse(_) => ErrorHandling::convert(MerinoWorldCupApiError::Other {
+                code: None,
+                reason: self.to_string(),
+            })
+            .report_error("merino-unexpected"),
+        }
+    }
+}

components/merino/src/worldcup/fixtures/live.json

@@ -0,0 +1,60 @@
+{
+  "current": [
+    {
+      "date": "2026-04-30T14:00:00+00:00",
+      "global_event_id": 1002,
+      "home_team": {
+        "key": "ENG",
+        "global_team_id": 90000005,
+        "name": "England",
+        "region": "ENG",
+        "colors": [
+          "White",
+          "Red"
+        ],
+        "icon_url": "https://storage.googleapis.com/merino-images-prod/logos/nations/nations_gb-eng.png",
+        "group": "Group C",
+        "eliminated": false,
+        "standing": {
+          "wins": 0,
+          "losses": 0,
+          "draws": 0,
+          "points": 0
+        }
+      },
+      "away_team": {
+        "key": "USA",
+        "global_team_id": 90000006,
+        "name": "United States",
+        "region": "USA",
+        "colors": [
+          "Navy",
+          "White",
+          "Red"
+        ],
+        "icon_url": "https://storage.googleapis.com/merino-images-prod/logos/nations/nations_us.png",
+        "group": "Group C",
+        "eliminated": false,
+        "standing": {
+          "wins": 0,
+          "losses": 0,
+          "draws": 0,
+          "points": 0
+        }
+      },
+      "period": "2",
+      "home_score": 1,
+      "away_score": 0,
+      "home_extra": null,
+      "away_extra": null,
+      "home_penalty": null,
+      "away_penalty": null,
+      "clock": "67",
+      "updated": 1777554000,
+      "status": "In Progress",
+      "status_type": "live",
+      "query": null,
+      "sport": "soccer"
+    }
+  ]
+}