3 files changed, 140 insertions, 0 deletions
diff --git a/src/SMAPI.Web/Framework/LogParser/GetPasteResponse.cs b/src/SMAPI.Web/Framework/LogParser/GetPasteResponse.cs
new file mode 100644
index 00000000..4f8794db
--- /dev/null
+++ b/src/SMAPI.Web/Framework/LogParser/GetPasteResponse.cs
@@ -0,0 +1,15 @@
+namespace StardewModdingAPI.Web.Framework.LogParser
+{
+    /// <summary>The response for a get-paste request.</summary>
+    internal class GetPasteResponse
+    {
+        /// <summary>Whether the log was successfully fetched.</summary>
+        public bool Success { get; set; }
+
+        /// <summary>The fetched paste content (if <see cref="Success"/> is <c>true</c>).</summary>
+        public string Content { get; set; }
+
+        /// <summary>The error message (if saving failed).</summary>
+        public string Error { get; set; }
+    }
+}
diff --git a/src/SMAPI.Web/Framework/LogParser/PastebinClient.cs b/src/SMAPI.Web/Framework/LogParser/PastebinClient.cs
new file mode 100644
index 00000000..8536f249
--- /dev/null
+++ b/src/SMAPI.Web/Framework/LogParser/PastebinClient.cs
@@ -0,0 +1,110 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Net.Http;
+using System.Threading.Tasks;
+using Pathoschild.Http.Client;
+
+namespace StardewModdingAPI.Web.Framework.LogParser
+{
+    /// <summary>An API client for Pastebin.</summary>
+    internal class PastebinClient : IDisposable
+    {
+        /*********
+        ** Properties
+        *********/
+        /// <summary>The underlying HTTP client.</summary>
+        private readonly IClient Client;
+
+        /// <summary>The developer key used to authenticate with the Pastebin API.</summary>
+        private readonly string DevKey;
+
+
+        /*********
+        ** Public methods
+        *********/
+        /// <summary>Construct an instance.</summary>
+        /// <param name="baseUrl">The base URL for the Pastebin API.</param>
+        /// <param name="userAgent">The user agent for the API client.</param>
+        /// <param name="devKey">The developer key used to authenticate with the Pastebin API.</param>
+        public PastebinClient(string baseUrl, string userAgent, string devKey)
+        {
+            this.Client = new FluentClient(baseUrl).SetUserAgent(userAgent);
+            this.DevKey = devKey;
+        }
+
+        /// <summary>Fetch a saved paste.</summary>
+        /// <param name="id">The paste ID.</param>
+        public async Task<GetPasteResponse> GetAsync(string id)
+        {
+            try
+            {
+                // get from API
+                string content = await this.Client
+                    .GetAsync($"raw/{id}")
+                    .AsString();
+
+                // handle Pastebin errors
+                if (string.IsNullOrWhiteSpace(content))
+                    return new GetPasteResponse { Error = "Received an empty response from Pastebin." };
+                if (content.StartsWith("<!DOCTYPE"))
+                    return new GetPasteResponse { Error = $"Received a captcha challenge from Pastebin. Please visit https://pastebin.com/{id} in a new window to solve it." };
+                return new GetPasteResponse { Success = true, Content = content };
+            }
+            catch (ApiException ex) when (ex.Status == HttpStatusCode.NotFound)
+            {
+                return new GetPasteResponse { Error = "There's no log with that ID." };
+            }
+            catch (Exception ex)
+            {
+                return new GetPasteResponse { Error = ex.ToString() };
+            }
+        }
+
+        public async Task<SavePasteResponse> PostAsync(string content)
+        {
+            try
+            {
+                // validate
+                if (string.IsNullOrWhiteSpace(content))
+                    return new SavePasteResponse { Error = "The log content can't be empty." };
+
+                // post to API
+                string response = await this.Client
+                        .PostAsync("api/api_post.php")
+                        .WithBodyContent(new FormUrlEncodedContent(new Dictionary<string, string>
+                        {
+                            ["api_dev_key"] = "b8219d942109d1e60ebb14fbb45f06f9",
+                            ["api_option"] = "paste",
+                            ["api_paste_private"] = "1",
+                            ["api_paste_code"] = content,
+                            ["api_paste_expire_date"] = "1W"
+                        }))
+                        .AsString();
+
+                // handle Pastebin errors
+                if (string.IsNullOrWhiteSpace(response))
+                    return new SavePasteResponse { Error = "Received an empty response from Pastebin." };
+                if (response.StartsWith("Bad API request"))
+                    return new SavePasteResponse { Error = response };
+                if (!response.Contains("/"))
+                    return new SavePasteResponse { Error = $"Received an unknown response: {response}" };
+
+                // return paste ID
+                string pastebinID = response.Split("/").Last();
+                return new SavePasteResponse { Success = true, ID = pastebinID };
+            }
+            catch (Exception ex)
+            {
+                return new SavePasteResponse { Success = false, Error = ex.ToString() };
+            }
+        }
+
+        /// <summary>Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.</summary>
+        public void Dispose()
+        {
+            this.Client.Dispose();
+        }
+    }
+}
diff --git a/src/SMAPI.Web/Framework/LogParser/SavePasteResponse.cs b/src/SMAPI.Web/Framework/LogParser/SavePasteResponse.cs
new file mode 100644
index 00000000..1c0960a4
--- /dev/null
+++ b/src/SMAPI.Web/Framework/LogParser/SavePasteResponse.cs
@@ -0,0 +1,15 @@
+namespace StardewModdingAPI.Web.Framework.LogParser
+{
+    /// <summary>The response for a save-log request.</summary>
+    internal class SavePasteResponse
+    {
+        /// <summary>Whether the log was successfully saved.</summary>
+        public bool Success { get; set; }
+
+        /// <summary>The saved paste ID (if <see cref="Success"/> is <c>true</c>).</summary>
+        public string ID { get; set; }
+
+        /// <summary>The error message (if saving failed).</summary>
+        public string Error { get; set; }
+    }
+}