[taler-taler-ios] 24/32: static func <

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marc-stibane pushed a commit to branch master
in repository taler-ios.

commit 17e0e92b012c3fe08c6bb58b3f3044fe0df93d58
Author: Marc Stibane <marc@taler.net>
AuthorDate: Thu Feb 8 17:46:38 2024 +0100

    static func <
---
 TalerWallet1/Backend/WalletBackendRequest.swift | 24 ++++++++++++++++++++++++
 TalerWallet1/Model/Model+Exchange.swift         |  9 +++++++++
 2 files changed, 33 insertions(+)

diff --git a/TalerWallet1/Backend/WalletBackendRequest.swift 
b/TalerWallet1/Backend/WalletBackendRequest.swift
index 6a5ef20..19bee0b 100644
--- a/TalerWallet1/Backend/WalletBackendRequest.swift
+++ b/TalerWallet1/Backend/WalletBackendRequest.swift
@@ -34,6 +34,30 @@ struct ScopeInfo: Codable, Hashable {
     var url: String?            // only for "exchange"
     var currency: String        // 3-char ISO 4217 code for global currency. 
Regional MUST be >= 4 letters
 
+    public static func < (lhs: ScopeInfo, rhs: ScopeInfo) -> Bool {
+        if lhs.type == .global {
+            if rhs.type == .global {        // both global ==> alphabetic 
currency
+                return lhs.currency < rhs.currency
+            }
+            return true                     // global comes first
+        }
+        if rhs.type == .global {
+            return false                    // global comes first
+        }
+        if lhs.currency == rhs.currency {
+            if let lhsBaseURL = lhs.url {
+                if let rhsBaseURL = rhs.url {
+                    return lhsBaseURL < rhsBaseURL
+                }
+                return true
+            }
+            if let rhsBaseURL = rhs.url {
+                return false
+            }
+            // fall thru
+        }
+        return lhs.currency < rhs.currency
+    }
     public static func == (lhs: ScopeInfo, rhs: ScopeInfo) -> Bool {
         if let lhsBaseURL = lhs.url {
             if let rhsBaseURL = rhs.url {
diff --git a/TalerWallet1/Model/Model+Exchange.swift 
b/TalerWallet1/Model/Model+Exchange.swift
index 5b362f0..6de9b6a 100644
--- a/TalerWallet1/Model/Model+Exchange.swift
+++ b/TalerWallet1/Model/Model+Exchange.swift
@@ -29,6 +29,15 @@ enum ExchangeUpdateStatus: String, Codable {
 // MARK: -
 /// The result from wallet-core's ListExchanges
 struct Exchange: Codable, Hashable, Identifiable {
+    static func < (lhs: Exchange, rhs: Exchange) -> Bool {
+        if let leftScope = lhs.scopeInfo {
+            if let rightScope = rhs.scopeInfo {
+                return leftScope < rightScope
+            }
+            return true             // scopeInfo comes first
+        }
+        return false
+    }
     static func == (lhs: Exchange, rhs: Exchange) -> Bool {
         return lhs.exchangeBaseUrl == rhs.exchangeBaseUrl
         &&     lhs.tosStatus == rhs.tosStatus

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