Merge branch 'develop' into stable

36 files changed, 1085 insertions, 531 deletions

diff --git a/src/SMAPI.Mods.ConsoleCommands/Framework/ItemRepository.cs b/src/SMAPI.Mods.ConsoleCommands/Framework/ItemRepository.cs
index 08dd8eed..6a17213c 100644
--- a/src/SMAPI.Mods.ConsoleCommands/Framework/ItemRepository.cs
+++ b/src/SMAPI.Mods.ConsoleCommands/Framework/ItemRepository.cs
@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Content;
 using StardewModdingAPI.Mods.ConsoleCommands.Framework.ItemData;
 using StardewValley;
 using StardewValley.Menus;
@@ -59,13 +60,13 @@ namespace StardewModdingAPI.Mods.ConsoleCommands.Framework
                     yield return this.TryCreate(ItemType.Flooring, id, () => new Wallpaper(id, isFloor: true) { Category = SObject.furnitureCategory });
 
                 // equipment
-                foreach (int id in Game1.content.Load<Dictionary<int, string>>("Data\\Boots").Keys)
+                foreach (int id in this.TryLoad<int, string>("Data\\Boots").Keys)
                     yield return this.TryCreate(ItemType.Boots, id, () => new Boots(id));
-                foreach (int id in Game1.content.Load<Dictionary<int, string>>("Data\\hats").Keys)
+                foreach (int id in this.TryLoad<int, string>("Data\\hats").Keys)
                     yield return this.TryCreate(ItemType.Hat, id, () => new Hat(id));
 
                 // weapons
-                foreach (int id in Game1.content.Load<Dictionary<int, string>>("Data\\weapons").Keys)
+                foreach (int id in this.TryLoad<int, string>("Data\\weapons").Keys)
                 {
                     yield return this.TryCreate(ItemType.Weapon, id, () => (id >= 32 && id <= 34)
                         ? (Item)new Slingshot(id)
@@ -74,7 +75,7 @@ namespace StardewModdingAPI.Mods.ConsoleCommands.Framework
                 }
 
                 // furniture
-                foreach (int id in Game1.content.Load<Dictionary<int, string>>("Data\\Furniture").Keys)
+                foreach (int id in this.TryLoad<int, string>("Data\\Furniture").Keys)
                 {
                     if (id == 1466 || id == 1468)
                         yield return this.TryCreate(ItemType.Furniture, id, () => new TV(id, Vector2.Zero));
@@ -94,7 +95,7 @@ namespace StardewModdingAPI.Mods.ConsoleCommands.Framework
                     // secret notes
                     if (id == 79)
                     {
-                        foreach (int secretNoteId in Game1.content.Load<Dictionary<int, string>>("Data\\SecretNotes").Keys)
+                        foreach (int secretNoteId in this.TryLoad<int, string>("Data\\SecretNotes").Keys)
                         {
                             yield return this.TryCreate(ItemType.Object, this.CustomIDOffset + secretNoteId, () =>
                             {
@@ -233,6 +234,23 @@ namespace StardewModdingAPI.Mods.ConsoleCommands.Framework
         /*********
         ** Private methods
         *********/
+        /// <summary>Try to load a data file, and return empty data if it's invalid.</summary>
+        /// <typeparam name="TKey">The asset key type.</typeparam>
+        /// <typeparam name="TValue">The asset value type.</typeparam>
+        /// <param name="assetName">The data asset name.</param>
+        private Dictionary<TKey, TValue> TryLoad<TKey, TValue>(string assetName)
+        {
+            try
+            {
+                return Game1.content.Load<Dictionary<TKey, TValue>>(assetName);
+            }
+            catch (ContentLoadException)
+            {
+                // generally due to a player incorrectly replacing a data file with an XNB mod
+                return new Dictionary<TKey, TValue>();
+            }
+        }
+
         /// <summary>Create a searchable item if valid.</summary>
         /// <param name="type">The item type.</param>
         /// <param name="id">The unique ID (if different from the item's parent sheet index).</param>
diff --git a/src/SMAPI.Mods.ConsoleCommands/manifest.json b/src/SMAPI.Mods.ConsoleCommands/manifest.json
index 0e6805dc..dbed84eb 100644
--- a/src/SMAPI.Mods.ConsoleCommands/manifest.json
+++ b/src/SMAPI.Mods.ConsoleCommands/manifest.json
@@ -1,9 +1,9 @@
 {
     "Name": "Console Commands",
     "Author": "SMAPI",
-    "Version": "3.3.2",
+    "Version": "3.4.0",
     "Description": "Adds SMAPI console commands that let you manipulate the game.",
     "UniqueID": "SMAPI.ConsoleCommands",
     "EntryDll": "ConsoleCommands.dll",
-    "MinimumApiVersion": "3.3.2"
+    "MinimumApiVersion": "3.4.0"
 }
diff --git a/src/SMAPI.Mods.SaveBackup/manifest.json b/src/SMAPI.Mods.SaveBackup/manifest.json
index 5165d2b2..dc8bc8d4 100644
--- a/src/SMAPI.Mods.SaveBackup/manifest.json
+++ b/src/SMAPI.Mods.SaveBackup/manifest.json
@@ -1,9 +1,9 @@
 {
     "Name": "Save Backup",
     "Author": "SMAPI",
-    "Version": "3.3.2",
+    "Version": "3.4.0",
     "Description": "Automatically backs up all your saves once per day into its folder.",
     "UniqueID": "SMAPI.SaveBackup",
     "EntryDll": "SaveBackup.dll",
-    "MinimumApiVersion": "3.3.2"
+    "MinimumApiVersion": "3.4.0"
 }
diff --git a/src/SMAPI.Toolkit/SMAPI.Toolkit.csproj b/src/SMAPI.Toolkit/SMAPI.Toolkit.csproj
index a7de7166..edb1d612 100644
--- a/src/SMAPI.Toolkit/SMAPI.Toolkit.csproj
+++ b/src/SMAPI.Toolkit/SMAPI.Toolkit.csproj
@@ -12,7 +12,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="HtmlAgilityPack" Version="1.11.20" />
+    <PackageReference Include="HtmlAgilityPack" Version="1.11.23" />
     <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
     <PackageReference Include="Pathoschild.Http.FluentClient" Version="3.3.1" />
     <PackageReference Include="System.Management" Version="4.5.0" Condition="'$(OS)' == 'Windows_NT'" />
diff --git a/src/SMAPI.Web/Framework/LogParsing/LogMessageBuilder.cs b/src/SMAPI.Web/Framework/LogParsing/LogMessageBuilder.cs
new file mode 100644
index 00000000..42e283a9
--- /dev/null
+++ b/src/SMAPI.Web/Framework/LogParsing/LogMessageBuilder.cs
@@ -0,0 +1,89 @@
+using System;
+using System.Text;
+using StardewModdingAPI.Web.Framework.LogParsing.Models;
+
+namespace StardewModdingAPI.Web.Framework.LogParsing
+{
+    /// <summary>Handles constructing log message instances with minimal memory allocation.</summary>
+    internal class LogMessageBuilder
+    {
+        /*********
+        ** Fields
+        *********/
+        /// <summary>The local time when the next log was posted.</summary>
+        public string Time { get; set; }
+
+        /// <summary>The log level for the next log message.</summary>
+        public LogLevel Level { get; set; }
+
+        /// <summary>The mod name for the next log message.</summary>
+        public string Mod { get; set; }
+
+        /// <summary>The text for the next log message.</summary>
+        private readonly StringBuilder Text = new StringBuilder();
+
+
+        /*********
+        ** Accessors
+        *********/
+        /// <summary>Whether the next log message has been started.</summary>
+        public bool Started { get; private set; }
+
+
+        /*********
+        ** Public methods
+        *********/
+        /// <summary>Start accumulating values for a new log message.</summary>
+        /// <param name="time">The local time when the log was posted.</param>
+        /// <param name="level">The log level.</param>
+        /// <param name="mod">The mod name.</param>
+        /// <param name="text">The initial log text.</param>
+        /// <exception cref="InvalidOperationException">A log message is already started; call <see cref="Clear"/> before starting a new message.</exception>
+        public void Start(string time, LogLevel level, string mod, string text)
+        {
+            if (this.Started)
+                throw new InvalidOperationException("Can't start new message, previous log message isn't done yet.");
+
+            this.Started = true;
+
+            this.Time = time;
+            this.Level = level;
+            this.Mod = mod;
+            this.Text.Append(text);
+        }
+
+        /// <summary>Add a new line to the next log message being built.</summary>
+        /// <param name="text">The line to add.</param>
+        /// <exception cref="InvalidOperationException">A log message hasn't been started yet.</exception>
+        public void AddLine(string text)
+        {
+            if (!this.Started)
+                throw new InvalidOperationException("Can't add text, no log message started yet.");
+
+            this.Text.Append("\n");
+            this.Text.Append(text);
+        }
+
+        /// <summary>Get a log message for the accumulated values.</summary>
+        public LogMessage Build()
+        {
+            if (!this.Started)
+                return null;
+
+            return new LogMessage
+            {
+                Time = this.Time,
+                Level = this.Level,
+                Mod = this.Mod,
+                Text = this.Text.ToString()
+            };
+        }
+
+        /// <summary>Reset to start a new log message.</summary>
+        public void Clear()
+        {
+            this.Started = false;
+            this.Text.Clear();
+        }
+    }
+}
diff --git a/src/SMAPI.Web/Framework/LogParsing/LogParser.cs b/src/SMAPI.Web/Framework/LogParsing/LogParser.cs
index cc91ec51..cce80816 100644
--- a/src/SMAPI.Web/Framework/LogParsing/LogParser.cs
+++ b/src/SMAPI.Web/Framework/LogParsing/LogParser.cs
@@ -201,7 +201,7 @@ namespace StardewModdingAPI.Web.Framework.LogParsing
                         }
 
                         // mod path line
-                        else if (message.Level == LogLevel.Debug && this.ModPathPattern.IsMatch(message.Text))
+                        else if (message.Level == LogLevel.Info && this.ModPathPattern.IsMatch(message.Text))
                         {
                             Match match = this.ModPathPattern.Match(message.Text);
                             log.ModPath = match.Groups["path"].Value;
@@ -282,43 +282,47 @@ namespace StardewModdingAPI.Web.Framework.LogParsing
         /// <exception cref="LogParseException">The log text can't be parsed successfully.</exception>
         private IEnumerable<LogMessage> GetMessages(string logText)
         {
-            LogMessage message = new LogMessage();
-            using (StringReader reader = new StringReader(logText))
+            LogMessageBuilder builder = new LogMessageBuilder();
+            using StringReader reader = new StringReader(logText);
+            while (true)
             {
-                while (true)
-                {
-                    // read data
-                    string line = reader.ReadLine();
-                    if (line == null)
-                        break;
-                    Match header = this.MessageHeaderPattern.Match(line);
-
-                    // validate
-                    if (message.Text == null && !header.Success)
-                        throw new LogParseException("Found a log message with no SMAPI metadata. Is this a SMAPI log file?");
+                // read line
+                string line = reader.ReadLine();
+                if (line == null)
+                    break;
 
-                    // start or continue message
-                    if (header.Success)
-                    {
-                        if (message.Text != null)
-                            yield return message;
+                // match header
+                Match header = this.MessageHeaderPattern.Match(line);
+                bool isNewMessage = header.Success;
 
-                        message = new LogMessage
-                        {
-                            Time = header.Groups["time"].Value,
-                            Level = Enum.Parse<LogLevel>(header.Groups["level"].Value, ignoreCase: true),
-                            Mod = header.Groups["modName"].Value,
-                            Text = line.Substring(header.Length)
-                        };
+                // start/continue message
+                if (isNewMessage)
+                {
+                    if (builder.Started)
+                    {
+                        yield return builder.Build();
+                        builder.Clear();
                     }
-                    else
-                        message.Text += "\n" + line;
+
+                    builder.Start(
+                        time: header.Groups["time"].Value,
+                        level: Enum.Parse<LogLevel>(header.Groups["level"].Value, ignoreCase: true),
+                        mod: header.Groups["modName"].Value,
+                        text: line.Substring(header.Length)
+                    );
                 }
+                else
+                {
+                    if (!builder.Started)
+                        throw new LogParseException("Found a log message with no SMAPI metadata. Is this a SMAPI log file?");
 
-                // end last message
-                if (message.Text != null)
-                    yield return message;
+                    builder.AddLine(line);
+                }
             }
+
+            // end last message
+            if (builder.Started)
+                yield return builder.Build();
         }
     }
 }
diff --git a/src/SMAPI.Web/Program.cs b/src/SMAPI.Web/Program.cs
index 5856fc98..5d13cdf3 100644
--- a/src/SMAPI.Web/Program.cs
+++ b/src/SMAPI.Web/Program.cs
@@ -16,6 +16,8 @@ namespace StardewModdingAPI.Web
             // configure web server
             WebHost
                 .CreateDefaultBuilder(args)
+                .CaptureStartupErrors(true)
+                .UseSetting("detailedErrors", "true")
                 .UseStartup<Startup>()
                 .Build()
                 .Run();
diff --git a/src/SMAPI.Web/SMAPI.Web.csproj b/src/SMAPI.Web/SMAPI.Web.csproj
index 97bea0fb..0a978b30 100644
--- a/src/SMAPI.Web/SMAPI.Web.csproj
+++ b/src/SMAPI.Web/SMAPI.Web.csproj
@@ -12,14 +12,14 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Azure.Storage.Blobs" Version="12.3.0" />
+    <PackageReference Include="Azure.Storage.Blobs" Version="12.4.0" />
     <PackageReference Include="Hangfire.AspNetCore" Version="1.7.9" />
-    <PackageReference Include="Hangfire.MemoryStorage" Version="1.6.3" />
-    <PackageReference Include="Hangfire.Mongo" Version="0.6.6" />
-    <PackageReference Include="HtmlAgilityPack" Version="1.11.20" />
+    <PackageReference Include="Hangfire.MemoryStorage" Version="1.7.0" />
+    <PackageReference Include="Hangfire.Mongo" Version="0.6.7" />
+    <PackageReference Include="HtmlAgilityPack" Version="1.11.23" />
     <PackageReference Include="Humanizer.Core" Version="2.7.9" />
     <PackageReference Include="JetBrains.Annotations" Version="2019.1.3" />
-    <PackageReference Include="Markdig" Version="0.18.1" />
+    <PackageReference Include="Markdig" Version="0.18.3" />
     <PackageReference Include="Microsoft.AspNetCore" Version="2.2.0" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc" Version="2.2.0" />
     <PackageReference Include="Microsoft.AspNetCore.Rewrite" Version="2.2.0" />
@@ -27,7 +27,7 @@
     <PackageReference Include="Mongo2Go" Version="2.2.12" />
     <PackageReference Include="MongoDB.Driver" Version="2.10.2" />
     <PackageReference Include="Newtonsoft.Json.Schema" Version="3.0.13" />
-    <PackageReference Include="Pathoschild.FluentNexus" Version="0.8.0" />
+    <PackageReference Include="Pathoschild.FluentNexus" Version="1.0.0" />
     <PackageReference Include="Pathoschild.Http.FluentClient" Version="3.3.1" />
   </ItemGroup>
   <ItemGroup>
diff --git a/src/SMAPI.Web/Startup.cs b/src/SMAPI.Web/Startup.cs
index 29086472..56ef9a79 100644
--- a/src/SMAPI.Web/Startup.cs
+++ b/src/SMAPI.Web/Startup.cs
@@ -192,8 +192,7 @@ namespace StardewModdingAPI.Web
         public void Configure(IApplicationBuilder app, IHostingEnvironment env)
         {
             // basic config
-            if (env.IsDevelopment())
-                app.UseDeveloperExceptionPage();
+            app.UseDeveloperExceptionPage();
             app
                 .UseCors(policy => policy
                     .AllowAnyHeader()
diff --git a/src/SMAPI.Web/Views/JsonValidator/Index.cshtml b/src/SMAPI.Web/Views/JsonValidator/Index.cshtml
index a00c8387..7287e00b 100644
--- a/src/SMAPI.Web/Views/JsonValidator/Index.cshtml
+++ b/src/SMAPI.Web/Views/JsonValidator/Index.cshtml
@@ -28,14 +28,16 @@
     {
         <meta name="robots" content="noindex" />
     }
-    <link rel="stylesheet" href="~/Content/css/json-validator.css?r=20191204" />
+    <link rel="stylesheet" href="~/Content/css/file-upload.css?r=202002" />
+    <link rel="stylesheet" href="~/Content/css/json-validator.css?r=202002" />
     <link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/tmont/sunlight@1.22.0/src/themes/sunlight.default.min.css" />
 
     <script src="https://cdn.jsdelivr.net/npm/jquery@3.3.1/dist/jquery.min.js" crossorigin="anonymous"></script>
     <script src="https://cdn.jsdelivr.net/gh/tmont/sunlight@1.22.0/src/sunlight.min.js" crossorigin="anonymous"></script>
     <script src="https://cdn.jsdelivr.net/gh/tmont/sunlight@1.22.0/src/plugins/sunlight-plugin.linenumbers.min.js" crossorigin="anonymous"></script>
     <script src="https://cdn.jsdelivr.net/gh/tmont/sunlight@1.22.0/src/lang/sunlight.javascript.min.js" crossorigin="anonymous"></script>
-    <script src="~/Content/js/json-validator.js?r=20191204"></script>
+    <script src="~/Content/js/file-upload.js?r=202002"></script>
+    <script src="~/Content/js/json-validator.js?r=202002"></script>
     <script>
         $(function() {
             smapi.jsonValidator(@Json.Serialize(this.Url.PlainAction("Index", "JsonValidator", new { schemaName = "$schemaName", id = "$id" })), @Json.Serialize(Model.PasteID));
@@ -86,6 +88,7 @@ else if (!isEditView && Model.PasteID != null)
 {
     <h2>Upload a JSON file</h2>
     <form action="@this.Url.PlainAction("PostAsync", "JsonValidator")" method="post">
+        <input id="inputFile" type="file" />
         <ol>
             <li>
                 Choose the JSON format:<br />
@@ -97,7 +100,7 @@ else if (!isEditView && Model.PasteID != null)
                 </select>
             </li>
             <li>
-                Drag the file onto this textbox (or paste the text in):<br />
+                Drag the file onto this textbox <small>(or <a href="#" id="choose-file-link">choose a file</a>)</small>:<br />
                 <textarea id="input" name="Content" placeholder="paste file here">@Model.Content</textarea>
             </li>
             <li>
diff --git a/src/SMAPI.Web/Views/LogParser/Index.cshtml b/src/SMAPI.Web/Views/LogParser/Index.cshtml
index 87c7f918..2183992b 100644
--- a/src/SMAPI.Web/Views/LogParser/Index.cshtml
+++ b/src/SMAPI.Web/Views/LogParser/Index.cshtml
@@ -22,10 +22,13 @@
     {
         <meta name="robots" content="noindex" />
     }
-    <link rel="stylesheet" href="~/Content/css/log-parser.css?r=20191127" />
+    <link rel="stylesheet" href="~/Content/css/file-upload.css?r=202002" />
+    <link rel="stylesheet" href="~/Content/css/log-parser.css?r=202002" />
+
     <script src="https://cdn.jsdelivr.net/npm/vue@2.5.17/dist/vue.min.js" crossorigin="anonymous"></script>
     <script src="https://cdn.jsdelivr.net/npm/jquery@3.3.1/dist/jquery.min.js" crossorigin="anonymous"></script>
-    <script src="~/Content/js/log-parser.js?r=20190515"></script>
+    <script src="~/Content/js/file-upload.js?r=202002"></script>
+    <script src="~/Content/js/log-parser.js?r=202002"></script>
     <script>
         $(function() {
             smapi.logParser({
@@ -135,9 +138,10 @@ else if (Model.ParsedLog?.IsValid == true)
 
     <h2>How do I share my log?</h2>
     <form action="@this.Url.PlainAction("PostAsync", "LogParser")" method="post">
+        <input id="inputFile" type="file" />
         <ol>
             <li>
-                Drag the file onto this textbox (or paste the text in):<br />
+                Drag the file onto this textbox <small>(or <a href="#" id="choose-file-link">choose a file</a>)</small>:<br />
                 <textarea id="input" name="input" placeholder="paste log here"></textarea>
             </li>
             <li>
@@ -300,7 +304,7 @@ else if (Model.ParsedLog?.IsValid == true)
                     string sectionFilter = message.Section != null && !message.IsStartOfSection ? $"&& sectionsAllow('{message.Section}')" : null; // filter the message by section if applicable
 
                     <tr class="mod @levelStr @sectionStartClass"
-                        @if (message.IsStartOfSection) { <text> v-on:click="toggleSection('@message.Section')" </text>  }
+                        @if (message.IsStartOfSection) { <text> v-on:click="toggleSection('@message.Section')" </text> }
                         v-show="filtersAllow('@Model.GetSlug(message.Mod)', '@levelStr') @sectionFilter">
                         <td v-pre>@message.Time</td>
                         <td v-pre>@message.Level.ToString().ToUpper()</td>
diff --git a/src/SMAPI.Web/wwwroot/Content/css/file-upload.css b/src/SMAPI.Web/wwwroot/Content/css/file-upload.css
new file mode 100644
index 00000000..ff170691
--- /dev/null
+++ b/src/SMAPI.Web/wwwroot/Content/css/file-upload.css
@@ -0,0 +1,25 @@
+#inputFile {
+    display: none;
+}
+
+#input {
+    width: 100%;
+    height: 20em;
+    max-height: 70%;
+    margin: auto;
+    box-sizing: border-box;
+    border-radius: 5px;
+    border: 1px solid #000088;
+    outline: none;
+    box-shadow: inset 0px 0px 1px 1px rgba(0, 0, 192, .2);
+}
+
+#submit {
+    font-size: 1.5em;
+    border-radius: 5px;
+    outline: none;
+    box-shadow: inset 0 0 1px 1px rgba(0, 0, 0, .2);
+    cursor: pointer;
+    border: 1px solid #008800;
+    background-color: #cfc;
+}
diff --git a/src/SMAPI.Web/wwwroot/Content/css/json-validator.css b/src/SMAPI.Web/wwwroot/Content/css/json-validator.css
index 18195098..de0f8fed 100644
--- a/src/SMAPI.Web/wwwroot/Content/css/json-validator.css
+++ b/src/SMAPI.Web/wwwroot/Content/css/json-validator.css
@@ -90,28 +90,3 @@
 .footer-tip a {
     color: gray;
 }
-
-/*********
-** Upload form
-*********/
-#input {
-    width: 100%;
-    height: 20em;
-    max-height: 70%;
-    margin: auto;
-    box-sizing: border-box;
-    border-radius: 5px;
-    border: 1px solid #000088;
-    outline: none;
-    box-shadow: inset 0px 0px 1px 1px rgba(0, 0, 192, .2);
-}
-
-#submit {
-    font-size: 1.5em;
-    border-radius: 5px;
-    outline: none;
-    box-shadow: inset 0 0 1px 1px rgba(0, 0, 0, .2);
-    cursor: pointer;
-    border: 1px solid #008800;
-    background-color: #cfc;
-}
diff --git a/src/SMAPI.Web/wwwroot/Content/css/log-parser.css b/src/SMAPI.Web/wwwroot/Content/css/log-parser.css
index 4d4ab326..bfbc8982 100644
--- a/src/SMAPI.Web/wwwroot/Content/css/log-parser.css
+++ b/src/SMAPI.Web/wwwroot/Content/css/log-parser.css
@@ -301,24 +301,3 @@ div[data-os] {
     display: none;
 }
 
-#input {
-    width: 100%;
-    height: 20em;
-    max-height: 70%;
-    margin: auto;
-    box-sizing: border-box;
-    border-radius: 5px;
-    border: 1px solid #000088;
-    outline: none;
-    box-shadow: inset 0px 0px 1px 1px rgba(0, 0, 192, .2);
-}
-
-#submit {
-    font-size: 1.5em;
-    border-radius: 5px;
-    outline: none;
-    box-shadow: inset 0 0 1px 1px rgba(0, 0, 0, .2);
-    cursor: pointer;
-    border: 1px solid #008800;
-    background-color: #cfc;
-}
diff --git a/src/SMAPI.Web/wwwroot/Content/js/file-upload.js b/src/SMAPI.Web/wwwroot/Content/js/file-upload.js
new file mode 100644
index 00000000..411efad3
--- /dev/null
+++ b/src/SMAPI.Web/wwwroot/Content/js/file-upload.js
@@ -0,0 +1,71 @@
+/* globals $ */
+var smapi = smapi || {};
+
+/**
+ * Implements the logic for a log/JSON file upload form.
+ *
+ * @param {object} opts The file upload form options.
+ * @param {jQuery} opts.chooseFileLink The clickable link which shows the file chooser.
+ * @param {jQuery} opts.chooseFileInput The file input element.
+ * @param {jQuery} opts.contentArea The file content area.
+ * @param {jQuery} opts.submitButton The submit button.
+ */
+smapi.fileUpload = function (opts) {
+    /**
+     * Toggle the submit button if the form has content.
+     */
+    var toggleSubmit = function () {
+        var hasText = !!opts.contentArea.val().trim();
+        opts.submitButton.prop("disabled", !hasText);
+    };
+
+    /**
+     * Paste the content of a file into the content area.
+     * @param {File} file The file whose content to paste.
+     */
+    var pasteFile = function (file) {
+        var reader = new FileReader();
+        reader.onload = $.proxy(function (file, $input, event) {
+            $input.val(event.target.result);
+            toggleSubmit();
+        }, this, file, $("#input"));
+        reader.readAsText(file);
+    };
+
+    // initialize
+    if (opts.contentArea.length) {
+        // disable submit button if it's empty
+        opts.contentArea.on("input", toggleSubmit);
+        toggleSubmit();
+
+        // drag & drop file
+        opts.contentArea.on({
+            "dragover dragenter": function (e) {
+                e.preventDefault();
+            },
+            "drop": function (e) {
+                e.preventDefault();
+
+                var transfer = e.originalEvent.dataTransfer;
+                if (transfer && transfer.files.length)
+                    pasteFile(transfer.files[0]);
+            }
+        });
+
+        // choose file
+        opts.chooseFileLink.on({
+            "click": function (e) {
+                e.preventDefault();
+                opts.chooseFileInput.click();
+            }
+        });
+        o