(#146) Remove hard-coded values in create template

Within the scriban templates used for creating release notes, there is a
hard-coded query string portion, which is used when linking to
milestones from the generated release notes.  When there was a single
VCS provider, i.e. GitHub, this was fine.  Now that we are introducing
another provider, we need to make this configurable.

This commit introduces a new method, GetMilestoneUrlQueryString(), which
each VCS provider will need to implement, to return the correct value.
In addition, the scriban template has been updated to make use of this,
as well as the model that is passed into the generation of the template.

src/GitReleaseManager.Core/Provider/GitHubProvider.cs

@@ -345,6 +345,11 @@ public RateLimit GetRateLimit()
             }
         }
 
+        public string GetMilestoneQueryString()
+        {
+            return "closed=1";
+        }
+
         private async Task ExecuteAsync(Func<Task> action)
         {
             try

src/GitReleaseManager.Core/Provider/IVcsProvider.cs

@@ -45,5 +45,7 @@ public interface IVcsProvider
         Task UpdateReleaseAsync(string owner, string repository, Release release);
 
         RateLimit GetRateLimit();
+
+        string GetMilestoneQueryString();
     }
 }

src/GitReleaseManager.Core/ReleaseNotes/ReleaseNotesBuilder.cs

@@ -68,6 +68,8 @@ public async Task<string> BuildReleaseNotesAsync(string user, string repository,
 
             var issuesDict = GetIssuesDict(issues);
 
+            var milestoneQueryString = _vcsProvider.GetMilestoneQueryString();
+
             var templateModel = new
             {
                 Issues = new
@@ -84,6 +86,7 @@ public async Task<string> BuildReleaseNotesAsync(string user, string repository,
                 {
                     Target = _targetMilestone,
                     Previous = previousMilestone,
+                    QueryString = milestoneQueryString,
                 },
                 IssueLabels = issuesDict.Keys.ToList(),
             };

src/GitReleaseManager.Core/Templates/default/release-info.sbn

@@ -1,9 +1,9 @@
 {{
     if issues.count > 0
         if commits.count > 0
-}}As part of this release we had [{{ commits.count }} {{ commits.count | string.pluralize "commit" "commits" }}]({{ commits.html_url }}) which resulted in [{{ issues.count }} {{ issues.count | string.pluralize "issue" "issues" }}]({{ milestone.target.html_url }}?closed=1) being closed.
+}}As part of this release we had [{{ commits.count }} {{ commits.count | string.pluralize "commit" "commits" }}]({{ commits.html_url }}) which resulted in [{{ issues.count }} {{ issues.count | string.pluralize "issue" "issues" }}]({{ milestone.target.html_url }}?{{ milestone.url_query_string }}) being closed.
 {{      else
-}}As part of this release we had [{{ issues.count }} {{ issues.count | string.pluralize "issue" "issues" }}]({{ milestone.target.html_url }}?closed=1) closed.
+}}As part of this release we had [{{ issues.count }} {{ issues.count | string.pluralize "issue" "issues" }}]({{ milestone.target.html_url }}?{{ milestone.query_string }}) closed.
 {{      end
     else if commits.count > 0
 }}As part of this release we had [{{ commits.count }} {{ commits.count | string.pluralize "commit" "commits" }}]({{ commits.html_url }}).

src/GitReleaseManager.Tests/ReleaseNotesBuilderTests.cs

@@ -237,6 +237,9 @@ private static void AcceptTest(int commits, Config config, Milestone milestone,
             vcsProvider.GetMilestonesAsync(owner, repository, Arg.Any<ItemStateFilter>())
                 .Returns(Task.FromResult((IEnumerable<Milestone>)vcsService.Milestones));
 
+            vcsProvider.GetMilestoneQueryString()
+                .Returns("closed=1");
+
             var builder = new ReleaseNotesBuilder(vcsProvider, logger, fileSystem, configuration, new TemplateFactory(fileSystem, configuration, TemplateKind.Create));
             var notes = builder.BuildReleaseNotesAsync(owner, repository, milestone.Title, ReleaseTemplates.DEFAULT_NAME).Result;