[recipes] Add a function to format a recipe as plain text

[Matthias Clasen <matthiasc src gnome org>]

commit 0de20edcc58e1aa02ea425495498837c32a9d5f2
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Feb 9 17:00:33 2017 -0500

    Add a function to format a recipe as plain text
    
    This will be useful for sharing recipes by email.

 src/Makefile.am           |    2 +
 src/gr-recipe-formatter.c |  182 +++++++++++++++++++++++++++++++++++++++++++++
 src/gr-recipe-formatter.h |   38 +++++++++
 3 files changed, 222 insertions(+), 0 deletions(-)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index 760c63b..c4225ff 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -86,6 +86,8 @@ recipes_SOURCES = \
        gr-recipe.c             \
        gr-recipe-exporter.h    \
        gr-recipe-exporter.c    \
+       gr-recipe-formatter.h   \
+       gr-recipe-formatter.c   \
        gr-recipe-importer.h    \
        gr-recipe-importer.c    \
        gr-recipe-printer.h     \
diff --git a/src/gr-recipe-formatter.c b/src/gr-recipe-formatter.c
new file mode 100644
index 0000000..db5bfc8
--- /dev/null
+++ b/src/gr-recipe-formatter.c
@@ -0,0 +1,182 @@
+/* gr-recipe-formatter.c:
+ *
+ * Copyright (C) 2017 Matthias Clasen <mclasen redhat com>
+ *
+ * Licensed under the GNU General Public License Version 3
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <glib/gi18n.h>
+
+#include "gr-recipe-formatter.h"
+#include "gr-ingredients-list.h"
+#include "gr-images.h"
+#include "gr-chef.h"
+#include "gr-recipe-store.h"
+#include "gr-app.h"
+#include "gr-utils.h"
+
+char *
+gr_recipe_format (GrRecipe *recipe)
+{
+        GString *s;
+        g_autoptr(GrChef) chef = NULL;
+        GrRecipeStore *store;
+        g_autoptr(GrIngredientsList) ingredients = NULL;
+        g_autofree char **segs = NULL;
+        g_auto(GStrv) ings = NULL;
+        int i, j;
+        int length;
+        g_autoptr(GPtrArray) steps = NULL;
+
+        store = gr_app_get_recipe_store (GR_APP (g_application_get_default ()));
+        chef = gr_recipe_store_get_chef (store, gr_recipe_get_author (recipe));
+
+        s = g_string_new ("");
+
+        g_string_append_printf (s, "*** %s ***\n", gr_recipe_get_translated_name (recipe));
+        g_string_append (s, "\n");
+        g_string_append_printf (s, "%s %s\n", _("Author:"), gr_chef_get_fullname (chef));
+        g_string_append_printf (s, "%s %s\n", _("Preparation:"), gr_recipe_get_prep_time (recipe));
+        g_string_append_printf (s, "%s %s\n", _("Cooking:"), gr_recipe_get_cook_time (recipe));
+        g_string_append_printf (s, "%s %d\n", _("Serves:"), gr_recipe_get_serves (recipe));
+        g_string_append (s, "\n");
+        g_string_append_printf (s, "%s\n", gr_recipe_get_translated_description (recipe));
+
+        ingredients = gr_ingredients_list_new (gr_recipe_get_ingredients (recipe));
+        segs = gr_ingredients_list_get_segments (ingredients);
+        for (j = 0; segs[j]; j++) {
+                g_string_append (s, "\n");
+                if (segs[j][0] != 0)
+                        g_string_append_printf (s, "* %s *\n", segs[j]);
+                else
+                        g_string_append_printf (s, "* %s *\n", _("Ingredients"));
+
+                ings = gr_ingredients_list_get_ingredients (ingredients, segs[j]);
+                length = g_strv_length (ings);
+                for (i = 0; i < length; i++) {
+                        char *unit;
+
+                        g_string_append (s, "\n");
+                        unit = gr_ingredients_list_scale_unit (ingredients, segs[j], ings[i], 1, 1);
+                        g_string_append (s, unit);
+                        g_free (unit);
+                        g_string_append (s, " ");
+                        g_string_append (s, ings[i]);
+                }
+
+                g_string_append (s, "\n");
+        }
+
+        g_string_append (s, "\n");
+        g_string_append_printf (s, "* %s *\n", _("Directions"));
+        g_string_append (s, "\n");
+
+        steps = gr_recipe_parse_instructions (gr_recipe_get_translated_instructions (recipe));
+        for (i = 0; i < steps->len; i++) {
+                GrRecipeStep *step = g_ptr_array_index (steps, i);
+                g_string_append (s, step->text);
+                g_string_append (s, "\n\n");
+        }
+
+        return g_string_free (s, FALSE);
+}
+
+static GrRecipeStep *
+recipe_step_new (const char *text,
+                 int         image,
+                 guint64     timer)
+{
+        GrRecipeStep *step;
+
+        step = g_new (GrRecipeStep, 1);
+        step->text = g_strdup (text);
+        step->image = image;
+        step->timer = timer;
+
+        return step;
+}
+
+static void
+recipe_step_free (gpointer data)
+{
+        GrRecipeStep *d = data;
+        g_free (d->text);
+        g_free (d);
+}
+
+GPtrArray *
+gr_recipe_parse_instructions (const char *instructions)
+{
+        GPtrArray *step_array;
+        g_auto(GStrv) steps = NULL;
+        int i;
+
+        step_array = g_ptr_array_new_with_free_func (recipe_step_free);
+
+        steps = g_strsplit (instructions, "\n\n", -1);
+
+        for (i = 0; steps[i]; i++) {
+                const char *p, *q;
+                int image = -1;
+                guint64 timer = 0;
+                g_autofree char *step = NULL;
+
+                p = strstr (steps[i], "[image:");
+                if (p) {
+                        g_autofree char *prefix = NULL;
+
+                        image = atoi (p + strlen ("[image:"));
+
+                        prefix = g_strndup (steps[i], p - steps[i]);
+                        q = strstr (p, "]");
+                        step = g_strconcat (prefix, q + 1, NULL);
+                }
+
+                p = strstr (steps[i], "[timer:");
+                if (p) {
+                        g_autofree char *s = NULL;
+                        g_auto(GStrv) strv = NULL;
+                        g_autofree char *prefix = NULL;
+
+                        q = strstr (p, "]");
+                        s = strndup (p + strlen ("[timer:"), q - (p + strlen ("[timer:")) - 1);
+                        strv = g_strsplit (s, ":", -1);
+                        if (g_strv_length (strv) == 2) {
+                                timer = G_TIME_SPAN_MINUTE * atoi (strv[0]) +
+                                        G_TIME_SPAN_SECOND * atoi (strv[1]);
+                        }
+                        else if (g_strv_length (strv) == 3) {
+                                timer = G_TIME_SPAN_HOUR * atoi (strv[0]) +
+                                        G_TIME_SPAN_MINUTE * atoi (strv[1]) +
+                                        G_TIME_SPAN_SECOND * atoi (strv[2]);
+                        }
+                        else {
+                                g_message ("Could not parse timer field %s; ignoring", s);
+                        }
+
+                        prefix = g_strndup (steps[i], p - steps[i]);
+                        q = strstr (p, "]");
+                        step = g_strconcat (prefix, q + 1, NULL);
+                }
+
+                g_ptr_array_add (step_array, recipe_step_new (step ? step : steps[i], image, timer));
+        }
+
+        return step_array;
+}
diff --git a/src/gr-recipe-formatter.h b/src/gr-recipe-formatter.h
new file mode 100644
index 0000000..5633b23
--- /dev/null
+++ b/src/gr-recipe-formatter.h
@@ -0,0 +1,38 @@
+/* gr-recipe-formatter.h:
+ *
+ * Copyright (C) 2017 Matthias Clasen <mclasen redhat com>
+ *
+ * Licensed under the GNU General Public License Version 3
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <gtk/gtk.h>
+#include "gr-recipe.h"
+
+G_BEGIN_DECLS
+
+char *gr_recipe_format (GrRecipe *recipe);
+
+typedef struct {
+        char *text;
+        int image;
+        guint64 timer;
+} GrRecipeStep;
+
+GPtrArray *gr_recipe_parse_instructions (const char *instructions);
+
+G_END_DECLS